Transformers for Switching Power Supplies

Transcription

1 Transformers for Switching Power Supplies Pin terminal type (For multiple outputs) series Type: Issue date: 0(Vertical/Horizontal types) (Vertical/Horizontal types) (Vertical/Horizontal types) April 00 Conformity to RoHS Directive: This means that, in conformity with EU Directive 00//EC, lead, cadmium, mercury, heavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, ecept for eempted applications.

2 Switching Power Supply Transformers Series Contents Page Development Concept... Replacement Parts List... 0 Series for Multiple Outputs (Vertical/Horizontal Type)... Series for Multiple Outputs (Vertical/Horizontal Type)... Series for Multiple Outputs (Vertical/Horizontal Type)... List of Plans for Standard Windings and Connections...0 Standard GAP... Specifications... Design Reference for Switching Power Transformers... Specification Request Forms For Flyback Converter... For Home Appliances...0

3 (/0) Switching Power Supply Transformers Series Conformity to RoHS Directive Development Concept The series is compliant with worldwide safety standards. It is a pin-compatible, newly developed transformer that can be downsized and thinned. Applicable as of April 00: UL/IEC/J 00 Ver. (TV, DVD, STB), UL/IEC/00 Ver. (printer), UL/IEC 0- Ver. (home appliance) MATERIAL Optimum materials and core shape have been developed. No insulation-supporting material is used, and this secures the insulating distance. While optimizing materials, TDK has further improved its proprietary core shape to develop a new-type core. TDK has downsized the product considerably in order to securing the necessary creepage distance. MANUFACTURING METHOD Since the Series supports automatic winding, the product is of a high quality and can be manufactured stably. It is designed to support automatic winding, which enables a remarkable reduction in the loss generated to achieve a proficient in manual winding until stable production. In addition, the characteristic variations of the winding wire and creepage tape have largely been removed, stabilizing the transformer's characteristics. OPTIMIZATION DESIGN Using design tools developed with TDK's comprehensive know-how, high-precision design has been achieved in a short period of time. ) For optimization design and high-quality stable production, customers can use a specification request form. If you provide the necessary information in the form, you will receive the optimization design in a short time. ) We have prepared an individual specifications request document for the home appliance market. ) TDK recommends design with a standard core gap (AL-value) for optimization and shorter trial and mass production lead time. ) Plans for standard winding connection (patterns of recommended pin arrangement and winding structure) are available. These help to speed up the design process, support automatic winding, and prevent deterioration in quality. ENVIRONMENT The series is RoHS directive-compliant and halogen-free product. Ferrite cores, bobbins, cases, etc. are not sold individually. Conformity to RoHS Directive: This means that, in conformity with EU Directive 00//EC, lead, cadmium, mercury, heavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, ecept for eempted ópìr / 0000 / e_eco.fm

4 H H (/0) Replacement Parts List We have made a new lineup of replacement parts for products with different shapes that meet our customers needs for smaller products. We can also provide different transformer shapes not shown in the catalog, so feel free to contact us. W D D W REPLACEMENT PARTS LIST General-purpose shaped core Vertical type EI EE/ EED0 EER EERL EER EER Eisting EGG New Bobbin type Maimum eternal size D W H (mm)ma. Reference output power (W) Switching frequency fsw(khz) Cross-sectional center leg area Ae (mm ) Bobbin terminal Pin Lead pitch space F (mm) (mm) EGG0 0 V V EGG0 0 V V V EGG0 V V V V EGG V V EGG 0 V V EGG0 V V V V Under V EGG development V Under V development V EGG Under V development V Horizontal type 0 H EE/ NEW 00 H H EER0 NEW H H H H EER EGG 0 H H H H EERL EGG0 0 H H EER EGG Under development H Number of pins Ferrite cores, bobbin are not sold separately. The bobbin is made from phenol with a flame resistance grade of V- or higher. The reference output was obtained under conditions where the frequency was 0kHz and creepage distance was mm. (See the relevant page for details of each shape.) The reference output differs depending on the switching device, switching frequency, transformer temperature, conditions, etc. Use this output for reference. Scheduled to be supported from April 00 onwards (prior to that date, it is supported by the EGG type) / 0000 / e_eco.fm

5 (/0) Lineup of Series 0 (0) () 0 0 Height from substrate(mm) () : Vertical type Handling power(w) : Horizontal type : Vertical type (Under development) : Horizontal type (Under development) 00-0 / 0000 / e_eco.fm

6 (/0) 0 Series For Multiple Outputs (Vertical/Horizontal Type) TDK provides a remarkably small multiple output power transformer. This product uses the performance of High B and Low loss ferrite material PC, to achieve optimization of the balance between its core volume and winding occupation rate. FEATURES Downsized yet compliant with worldwide safety standards. Supports automatic winding. Considerably reduced characteristic variations. Compliant with the RoHS Directive and halogen-free. APPLICATIONS Set-top bo, air-conditioners, DVD players/recorders Multiple-output power supplies SPECIFICATIONS : Recommended range Transformer part No Transformer handling power(w) [Vertical/Horizontal type] Frequency Creepage distance 0.0mm.0mm.mm.mm.0mm.0mm.mm.0mm 0kHz / / /0 / / khz / / / / 0/ / 00kHz / / / / / / 0kHz / / / 0/ / 0/ / khz / / / 0/ / / / 00kHz /0 / / / / / / 0kHz / / / /0 / / / khz 0/ / / / / / / 00kHz / / / / / / / The Vertical type places its described creepage distance and its half distance on the terminal side and guard side, respectively. The Horizontal type places its described creepage distance on both sides. Transformer-handling power may differ depending on switching devices, switching frequency, transformer temperature, conditions during usage, etc. Therefore, use the handling power for reference only. Transformer part No Generalpurpose core EE/ (EI) Core material PC family Crosssectional area Ae(mm ). Bobbin type Spool width (mm) min. Spool height (mm) min. Number of pins (pins) Dimensions(mm) D W H Depth Width Height V H V H V H Applications Air STB conditioner DVD BD Others 00-0 / 0000 / e_eco.fm

7 (/0) 0 Series For Multiple Outputs (Vertical Type) Conformity to RoHS Directive SHAPES AND DIMENSIONS BOBBIN TYPE: V.ma..ma. 0 H ma..±0. -ø0. Part No. Bobbin type H ma. 0 V.0 00 V.0 0 V 0.0 RMMENDED BASE MATERIAL OPENING SIZE.±0. -ø..0±0. RMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits -connection -connection A B NP NP NS NP NSb NP NSb st side -output NSa 0 NSa 0 Please refer to P.0 for more details about the list of recommended plans for windings and connections. Compatible ferrite materials for this product are the PC family. Conformity to RoHS Directive: This means that, in conformity with EU Directive 00//EC, lead, cadmium, mercury, heavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, ecept for eempted ópìr / 0000 / e_eco.fm

8 (/0) 0 Series For Multiple Outputs (Horizontal Type) Conformity to RoHS Directive SHAPES AND DIMENSIONS BOBBIN TYPE: H D ma..ma. 0.0ma..±0. 0 -ø0. Part No. Bobbin type D ma. F 0 H H.0. 0 H..0 RMMENDED BASE MATERIAL OPENING SIZE.±0. -ø. F±0. RMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item st side -output Number of secondary circuits -connection -connection C D NP NP NP NSb NP NSa 0 NS NSb NSa 0 Please refer to P.0 for more details about the list of recommended plans for windings and connections. Compatible ferrite materials for this product are the PC family. Conformity to RoHS Directive: This means that, in conformity with EU Directive 00//EC, lead, cadmium, mercury, heavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, ecept for eempted ópìr / 0000 / e_eco.fm

9 (/0) Series For Multiple Outputs (Vertical/Horizontal Type) TDK provides a remarkably small multiple-output power transformer. This product uses the performance of High B and Low loss ferrite material PC, to achieve optimization of the balance between its core volume and winding occupation rate. FEATURES Downsized yet compliant with worldwide safety standards. Supports automatic winding. Considerably reduced characteristic variations. Compliant with the RoHS directive and halogen-free. APPLICATIONS Set-top bo, air-conditioners, DVD players/recorders, BD players/recorders, printers, LCD monitors Multiple-output power supplies SPECIFICATIONS : Recommended range Transformer part No. 0 Transformer handling power(w) [Vertical/Horizontal type] Frequency Creepage distance 0.0mm.0mm.mm.mm.0mm.0mm.mm.0mm 0kHz / / 0/ / 0/ / / khz / / / / / / / 00kHz / / / / / / / 0kHz / /0 0/ /0 / / / khz / / / 0/ / / / 00kHz / 0/ / /0 / / / 0kHz / / / / / / 0/ khz / / / / / / / 00kHz /0 / /0 / / / / The Vertical type places its described creepage distance and its half distance on the terminal side and guard side, respectively. The Horizontal type places its described creepage distance on both sides. Transformer-handling power may differ depending on switching devices, switching frequency, transformer temperature, conditions during usage, etc. Therefore, use the handling power for reference only. Transformer part No. 0 Generalpurpose core EER EED0 Core material PC family Crosssectional area Ae(mm ). Bobbin type Spool width (mm) min. Spool height (mm) min. Number of pins (pins) Dimensions(mm) D W H Depth Width Height V V V H H V V V H H V V H H Applications Air STB conditioner DVD BD Others 00-0 / 0000 / e_eco.fm

10 (/0) Series For Multiple Outputs (Vertical Type) Conformity to RoHS Directive SHAPES AND DIMENSIONS BOBBIN TYPE: V, V.0ma. W ma. 0 H ma..±0. -ø0. Part No. Bobbin type W ma. H ma. P V..0.0 V V..0.0 V V..0.0 V RMMENDED BASE MATERIAL OPENING SIZE P±0. -ø..±0. RMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits -connection -connection A B NP NP NS NP NSb NP NSb st side -output NSa 0 NSa 0 Please refer to P.0 for more details about the list of recommended plans for windings and connections. Compatible ferrite materials for this product are the PC family. Conformity to RoHS Directive: This means that, in conformity with EU Directive 00//EC, lead, cadmium, mercury, heavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, ecept for eempted ópìr / 0000 / e_eco.fm

11 (/0) Series For Multiple Outputs (Vertical Type) Conformity to RoHS Directive SHAPES AND DIMENSIONS BOBBIN TYPE: V.0ma. 0.0ma. H ma..±0. 0 -ø0. Part No. Bobbin type H ma. V.0 V.0 RMMENDED BASE MATERIAL OPENING SIZE.±0. -ø..±0. Compatible ferrite materials for this product are the PC family. Conformity to RoHS Directive: This means that, in conformity with EU Directive 00//EC, lead, cadmium, mercury, heavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, ecept for eempted ópìr / 0000 / e_eco.fm

12 (0/0) Series For Multiple Outputs (Vertical Type) RMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits -connection -connection -connection E F G- NP NP NSb NSa 0 NP NP NS NSb NSa 0 NP NP NS NS NS NS 0 st side -output H- I- NP NP NS NP NSb NP NSb NSa NSa st side -output H- I- NP NP NS NP NSb NP NSb NSa NSa Please refer to P.0 for more details about the list of recommended plans for windings and connections / 0000 / e_eco.fm

13 (/0) Series For Multiple Outputs (Horizontal Type) Conformity to RoHS Directive SHAPES AND DIMENSIONS BOBBIN TYPE: H, H D ma. W ma..0ma..±0. 0 -ø0. Part No. Bobbin type D ma. W ma. P F H H H H H H RMMENDED BASE MATERIAL OPENING SIZE P±0. -ø. F±0. RMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item st side -output Number of secondary circuits -connection -connection C D NP NP NP NSb NP NSa 0 NS NSb NSa 0 Please refer to P.0 for more details about the list of recommended plans for windings and connections. Compatible ferrite materials for this product are the PC family. Conformity to RoHS Directive: This means that, in conformity with EU Directive 00//EC, lead, cadmium, mercury, heavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, ecept for eempted ópìr / 0000 / e_eco.fm

14 (/0) Series For Multiple Outputs (Vertical/Horizontal Type) TDK provides a remarkably small multiple-output power transformer. This product uses the performance of High B and Low loss ferrite material PC, to achieve optimization of the balance between its core volume and winding occupation rate. FEATURES Downsized yet compliant with worldwide safety standards. Supports automatic winding. Considerably reduced characteristic variations. Compliant with the RoHS directive and halogen-free. APPLICATIONS Set-top bo, air-conditioners, DVD players/recorders, BD players/recorders, printers, LCD monitors Multiple-output power supplies SPECIFICATIONS : Recommended range Transformer part No. 0 0 Transformer handling power(w) [Vertical/Horizontal type] Frequency Creepage distance 0.0mm.0mm.mm.mm.0mm.0mm.mm.0mm 0kHz 0/ / / / / / / khz / 0/ / / /0 / / 00kHz / /0 / / / / / 0kHz / / / 0/ / / / khz / / / /0 / / / 00kHz / / / 0/ / 0/ / 0kHz / / / / / / / khz 0 / / / / 0/ 0/ / 00kHz 0 0/ /0 / / / / / The Vertical type places its described creepage distance and its half distance on the terminal side and guard side, respectively. The Horizontal type places its described creepage distance on both sides. Transformer-handling power may differ depending on switching devices, switching frequency, transformer temperature, conditions during usage, etc. Therefore, use the handling power for reference only. Transformer part No. 0 0 Generalpurpose core EER EERL Core material PC family Crosssectional area Ae(mm ). Bobbin type Spool width (mm) min. Spool height (mm) min. Number of pins (pins) Dimensions(mm) D W H Depth Width Height V V V V H H V V H H Applications Air STB condi- DVD BD Others tioner 00-0 / 0000 / e_eco.fm

15 (/0) Series For Multiple Outputs (Vertical Type) Conformity to RoHS Directive SHAPES AND DIMENSIONS BOBBIN TYPE: V.0ma..ma. 0 H ma..±0. -ø0. Part No. Bobbin type H ma. 0 V. V. 0 V. RMMENDED BASE MATERIAL OPENING SIZE.0±0. -ø..±0. RMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits -connection -connection A B NP NP NS NP NSb NP NSb st side -output NSa 0 NSa 0 Please refer to P.0 for more details about the list of recommended plans for windings and connections. Compatible ferrite materials for this product are the PC family. Conformity to RoHS Directive: This means that, in conformity with EU Directive 00//EC, lead, cadmium, mercury, heavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, ecept for eempted ópìr / 0000 / e_eco.fm

16 (/0) Series For Multiple Outputs (Vertical Type) Conformity to RoHS Directive SHAPES AND DIMENSIONS BOBBIN TYPE: V.0ma.. ma. H ma..±0. 0 -ø0. Part No. Bobbin type H ma. 0 V. RMMENDED BASE MATERIAL OPENING SIZE.0±0. -ø. 0.0±0. Compatible ferrite materials for this product are the PC family. Conformity to RoHS Directive: This means that, in conformity with EU Directive 00//EC, lead, cadmium, mercury, heavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, ecept for eempted ópìr / 0000 / e_eco.fm

17 (/0) Series For Multiple Outputs (Vertical Type) RMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits -connection -connection -connection E F G- NP NP NSb NSa 0 NP NP NS NSb NSa 0 NP NP NS NS NS NS 0 st side -output G- NS NP NP NS NS 0 NS H- I- NP NP NS NP NSb NP NSb NSa NSa st side -output H- I- NP NP NS NP NSb NP NSb NSa NSa Please refer to P.0 for more details about the list of recommended plans for windings and connections / 0000 / e_eco.fm

18 (/0) Series For Multiple Outputs (Vertical Type) Conformity to RoHS Directive SHAPES AND DIMENSIONS BOBBIN TYPE: V.0ma.. ma. H ma..±0. 0 -ø0. Part No. Bobbin type H ma. V. 0 V. RMMENDED BASE MATERIAL OPENING SIZE.0±0. -ø. 0.0±0. Compatible ferrite materials for this product are the PC family. Conformity to RoHS Directive: This means that, in conformity with EU Directive 00//EC, lead, cadmium, mercury, heavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, ecept for eempted ópìr / 0000 / e_eco.fm

19 (/0) Series For Multiple Outputs (Vertical Type) RMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits -connection -connection -connection J- K- L- NP NP NSb NSa 0 NP NP NS NSb NSa 0 NP NP NS NS NS NS 0 L- NS NP NP NS NS 0 NS st side -output J- NP NP NSb NSa 0 K- NP NP NS NSb NSa 0 L- NP NP NS NS NS NS 0 L- NP NP NS NS NS 0 NS Please refer to P.0 for more details about the list of recommended plans for windings and connections / 0000 / e_eco.fm

20 (/0) Series For Multiple Outputs (Vertical Type) RMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item Number of secondary circuits -connection -connection -connection M- N- NP NP NS NP NP NS NS 0 NSa NSb 0 ND NV NS M- N- NP NP NS NP NP NS NS 0 NSa NSb 0 ND NS st side -output M- N- NV NP NP NS NP NP NS NS 0 NSa NSb 0 ND NV NS M- N- NP NP NS NP NP NS NS 0 NSa NSb 0 ND NS NV Please refer to P.0 for more details about the list of recommended plans for windings and connections / 0000 / e_eco.fm

21 (/0) Series For Multiple Outputs (Horizontal Type) Conformity to RoHS Directive SHAPES AND DIMENSIONS BOBBIN TYPE: H, H D ma. W ma..0ma..±0. 0 -ø0. Part No. Bobbin type D ma. W ma. P F H H H H RMMENDED BASE MATERIAL OPENING SIZE P±0. -ø. F±0. RMMENDED PLANS FOR WINDINGS AND CONNECTIONS Item st side -output Number of secondary circuits -connection -connection C D NP NP NP NSb NP NSa 0 NS NSb NSa 0 Please refer to P.0 for more details about the list of recommended plans for windings and connections. Compatible ferrite materials for this product are the PC family. Conformity to RoHS Directive: This means that, in conformity with EU Directive 00//EC, lead, cadmium, mercury, heavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, ecept for eempted ópìr / 0000 / e_eco.fm

22 (0/0) List of Plans for Standard Windings and Connections Item Number of secondary circuits -connection -connection -connection A B NP NP NSb NSa 0 NP NP NS NSb NSa 0 G- NP NP NS NS NS 0 NS C D NP NP NS G- NS st side -output NP NSb NSa 0 NP NSb NSa 0 NP NP NS NS NS 0 E F NP NSb NP NS NP 0 NP NSb 0 NSa NSa 00-0 / 0000 / e_eco.fm

23 (/0) Item Number of secondary circuits -connection -connection -connection J- NP NP NSb NSa 0 K- NP NP NS NSb NSa 0 L- NP NP NS NS NS NS 0 L- NS NP NP NS NS 0 NS st side -output J- NP NP NSb NSa 0 K- NP NP NS NSb NSa 0 L- NP NP NS NS NS NS 0 L- NP NP NS NS NS 0 NS 00-0 / 0000 / e_eco.fm

24 (/0) Item Number of secondary circuits -connection -connection -connection H- I- NP NP NS NP NSb NP NSb NSa NSa H- I- NP NP NS NP NSb NP NSb NSa NSa st side -output M- N- NP NP NS NP NP NS NS 0 NSa NSb 0 ND NV NS M- N- NP NP NS NP NP NS NS 0 NSa NSb 0 ND NS NV 00-0 / 0000 / e_eco.fm

25 (/0) Item Number of secondary circuits -connection -connection -connection M- N- NP NP NS NP NP NS NS 0 NSa NSb 0 ND NV NS st side -output M- N- NP NP NS NP NP NS NS 0 NSa NSb 0 ND NS NV 00-0 / 0000 / e_eco.fm

26 (/0) Standard GAP In order to respond to our customers requested delivery dates and costs, TDK can provide standard GAP products (indicated by " " in the below chart) for each shape. Please contact us about other GAP products separately. STANDARD GAP Core shape and size Multiple-output transformer AL-value: R0 Series(nH/N ) / 0000 / e_eco.fm

27 (/0) Specifications SPECIFICATIONS Temperature ranges Humidity ranges Operating Storage Operating Storage 0 to +0 C[with self-heating] 0 to + C 0 to (%)RH[Maimum wet-bulb temperature C, without dewing] 0 to (%)RH[Maimum wet-bulb temperature C, without dewing] GENERAL CHARACTERISTICS Standard test conditions Ambient temperature range to ±0 C Relative humidity range to (%)RH[without dewing] Item Standard Test methods Inductance Individual specification Use LCR meter (f=0khz), B or equivalent. (tolerance±0%) DC resistance Less than 0.Ω : ±0% Use Ohm-meter AXN or equivalent. 0.Ω to.0ω : ±0%.0Ω or more: ±% Turn ratio and polarity Specified value ± to 0%, individual Use turn ratio tester TRM-0 (f= to 00kHz) or equivalent. specification Withstand voltage No abnormality between the primary and Apply separately specified AC voltage (0Hz) for min. secondary windings, between the primary winding and the core, and so on. Insulation resistance 00MΩ min. Measure by applying DC.00V. Use insulation resistance meter SM-E or equivalent. Terminal strength.n min. Apply.N load in the direction of terminal ais for 0±s. Any terminal must not be pulled out or chatter. Temperature rise Standard design value C ma. (thermocouple method) Measure the core surface by thermocouple method, and the windings by resistance method or thermocouple method. C ma. (resistance method) Solderability Solder covers more than 0%. Dip in solder with the temperature of ± C for ±0.s. RELIABILITY TESTS Item Standards Test methods Vibration resistance Sweep.mm amplitude and 0-to--to-0Hz in min in X, Y, and Z directions for h respectively. Heat resistance Standard of inductance, insulation Measure in normal temperature after leaving in 00± C for h. Cold resistance resistance, withstand voltage must be Measure in normal temperature after leaving in 0± C for h. Humidity resistance satisfied. Measure in normal temperature after leaving in 0± C and 0 to (%)RH for h. Temperature cycle One cycle is C for 0min, normal temperature for 0min, and C for 0min; measure after 0 cycles of the test have been performed. The above listed items are representative eamples. The details can be found by referring to the appended individual delivery specifications / 0000 / e_eco.fm

28 (/0) Design Reference for Switching Power Transformers Maimum allowable temperature The maimum ambient temperature of the transformer is E Class (0 C). However, there is no E Class for transformers shipped for North America; therefore, the maimum ambient temperature is Class 0 (0 C). [Class 0 (0 C) is possible when UL insulating system is applied.] Temperature rise in Transformers In normal design condition, C or less (using the resistance method) is the target of temperature rise of windings. Therefore, the maimum ambient temperature at this time is C (0 C ma. for North America). In case of measuring the temperature of the windings by thermocouple, 0 to C more would be allowable. Dealing with safety regulations Designs are made in consideration of materials, structures an so on that the designed transformers are comply with designated safety regulations. ()Regarding the core To be handled in the same manner as Basic Insulation. ()Distance between transformer and other parts Please keep the distance between the transformer and other parts in according with applicable safety standards. Concerning of the influence of leakage flu Due to the fact that there is always some degree of leakage flu from transformer, designs should be made to keep them apart as much as possible from parts that are easily affected by this. Magnetic saturation of the core ()Magnetic operating condition of the core in the transformer are determined by maimum operation temperature (including temperature rise) and driving condition in circuits. If product is used in condition that eceed these conditions, there is a possibility of occurring magnetic saturation of the core. The following items could be possible cause of core saturation. The product is used in conditions that eceed the maimum operating temperature. Operating frequencies are lower than the ones initially designed. (longer ON time) The input voltage is abnormally higher than the specified values. ()To check on the saturation of the core it is possible to judge from current waveforms of primary winding. Current flowing in the inductor changes in a straight line in relation to time as in the figure a) in accordance with E l= T. L However, in the event that a saturation phenomena has occurred in the core, inductance is reduced causing a rapid and drastic increase of current as shown figure b). +E Ip Lp a)- Normal <In the case of flyback> b)- Saturation phenomena ()In this case, there is possibility that a breakdown may occur due to surpassing the rated current of the switch it is necessary to have over current protection circuit or modify transformer design. Circuit topologies of switching power supply The term topology refers to the arrangement of the power components within the switching power supply design. There are several different kind of circuit topologies as following; Forward converter ON/ON mode Push-Pull converter Half and Full-Bridge converter Self-ecited flyback system (RCC system, pseudo resonance system) ON/OFF mode Separately-ecited flyback system (PWM system, PFM system) Chopper type (step-down type, step-up type, step-up/ step-down type) Resonance mode Voltage resonance type, current resonance type 00-0 / 0000 / e_eco.fm

29 (/0) Which topology of switching power supply to use? Each topology has its relative merit in terms of cost and performance. One topology may have a low parts cost but only be able to provide a limited amount of power; another may have ample power capability but cost more, and so on. The following relationship between output voltage and power give us one suggestion when we need to chose topology in given conditions; How to decide primary inductance (Lp)? () When the self-ecited flyback system is selected: Using the formula P= LP IP f[w], it is possible to calculate the inductance value needed for the desired output P under the fied Ip value. By deriving E Ton=LP i from the formula E=LP di, dt Output voltage(v) ON-OFF type ON-OFF type and ON-ON type (-transistor type forward) ON-ON type (Multi-transistor type) the current which flows through the inductor becomes i= E Ton. By substituting this with P=..., the formula of ( ) P= LP E Ton f= E Ton f results. LP LP LP Output power(w) ON-OFF type: For high voltage/small current ON-ON type: For low voltage/large current The deference of power conversion between Forward and Flyback modes. Since the forward mode converter is a system that performs power transmission to the output side during ON period of switching transistor, it is possible to work with the large output current. Consequently, forward converter method is suitable to large current output with relatively lower output voltage. To the contrary, Flyback mode converter is a system that input power is stored within the Inductor or primary coil in the transformer as a magnetic energy during ON period of switching transistor and the stored energy transmit to output side during OFF period of switching transistor. Accordingly, Flyback mode converter is suitable to high voltage and low current output, and does not suite to large current output. From this, the formula LP= E Ton f results. P Where, E: Input voltage Ton: On time F: Switching frequency In actual designs this value is to be slightly lowered in consideration of the transformer s efficiency. () When the separately-ecited flyback system is selected: The coefficient k is added because a direct current is superimposed on the primary current waveform. LP= E Ton f (+k) P ( k) The primary current waveforms The self-ecited flyback system(rcc) The stored energy within the inductor. E +V0 Ip I Ton Ip Lp T The separately-ecited flyback system I Ip Energy stored in the inductor Lp is W= LP IP [J] when Ip is a triangular wave, and electric power (energy per unit time) is kip Ton T P= [J] = LP IP f[w] [S] Where, Lp: Inductance of primary winding Ip: Peak value of primary current f: Switching frequency 00-0 / 0000 / e_eco.fm

30 (/0) How to decide number of turns of primary winding? () When the separately-ecited flyback system is selected E min. Ton ma. NP= B A ( k) n : n D Where, E min.: Lower limit value of input voltage (Vdc) A: Core cross section area (m ) D: Duty ratio Ton ma.: The maimum ON time for switching transistor (sec.) : Operating flu density (T) Vi PWM Q iq R () When the self-ecited flyback system is selected: VQ t NP= E min. Ton ma. (Ton ma.= D ) B A f () When the separately-ecited flyback system is selected: NP= E min. Ton ma. B A ( k) Precautions must be taken as the upper limit value of B changes according to core materials, operating temperatures, frequencies, etc. Determining of secondary winding ON-OFF mode As it is necessary to consider the voltage drop of the rectifier diode on the secondary side, NS=NP Vo+VF D E min. D Where, Vf: Voltage drop of the rectifier diode Vo : Output voltage Ton ma. =D : Duty ratio /f Eample of drive waveforms () When the self-ecited flyback system is selected (RCC) Vi VCE ic ic Tr ton RS RB n toff n nb D R t t ic t ton toff In order for designing the transformer, the following conditions are necessary. It is greatly appreciated customer give us those conditions by filling out required information with the appended Transformer specifications / inquiry form. ()Circuit topology Flyback system, forward system, etc. () Used IC Design with a high degree of perfection is possible when IC manufacturer and model number information are provided. ()Input voltage range The lower limit of rectified voltage is important, in particular. () Operating frequency (fied/variable) It is especially necessary to determine the lower limit frequency for the maimum load condition in Flyback converter. () Maimum duty ratio It is necessary to specify maimum ON time when input voltage is lower limit, approimately % should be the maimum for eternal ecitation system. ()Operating temperature range,maimum temperature rise This is the allowable temperature rise in the transformer, should be equal to the value that ambient temperature has been taken from the temperature inde of the materials which is 0 C(0 C in UL system). ()Required safety regulations Structures and materials are chosen to comply with required safety regulations. ()Output voltage/current Required for determination of the winding ratios and wire gage. () Transformer outside dimension It is necessary for determining the shape. (0)Instructions concerning circuit designs and pin configuration of transformer Type of the secondary rectifier diode is important in particular because of voltage drop between First recovery and Schottky barrier type is different, it will affect to design of number of turns of transformer / 0000 / e_eco.fm

31 (/0) Transformer for Switching Regulator Specification Request Form(For Flyback Converter) Issued on / /. Company name Address. Department, applicant's name(including the sample-sending destination) Name: TEL/FAX: . Circuit system Person in Charge from Sales Promotion Dep.: Recorded Date / / Person in Charge from Sales Dep.: Recorded Date / / Prototype No: Recorded Date / /. Input specifications AC input voltage: Rated DC input voltage: Rated (V) to (V) Operating range: (V) to (V) (V) to (V) Operating range: (V) to (V). Output voltage/current/diode used (diode voltage drop) Output specifications Eample Output Output Output Output Output Output Output VCC Power application Motor Output voltage(v) (Accuracy) 0V (±V) Output Current(A) Minimum Typical T measuring condition Maimum time Peak time 0 0. A,0sec. A, sec. Primary/Secondary Secondary Feedback No Rectifier diode FRD VF(V) 0. (Rectifier diode F.R.D: First Recovery Diode, S.B.D: Schottky Barrier Diode) Request for connection method Yes No (When checking "Yes", please attach a drawing separately.) Pin assignments changes Possible Impossible. Clock frequency ( Fleible / Fied) fsw to (khz). Ma. duty or ma. ON time D ma. (%), T ma. (s). Input capacitor capacitance CIN (µf) (If not specified, design will be performed using a value of ( )µf, which is times greater than the output power for 00V and worldwide transformers, and an output power of ( )µf for 00V transformers.). Operating temperature range, ma. temperature rise, and ambient temperature to ( C) T ( C Typ. Ma.) Ambient temperature C 0. Desired core size and outer dimensions of transformer Core size Outer dimensions of the transformer L W H mm ma.. Safety standard compliance Standard Electrical Appliance and Material Safety Law UL IEC CSA Others Application for a single item purchase Yes Set purchase No (Please bear in mind that the application fee may be borne by the customer.) Insulation type Basic insulation Reinforced insulation Double insulation Other ( ) Pollution degree (If not specified, design will be performed with a pollution degree of.). Safety distance (Please enter the distance prescribed by the company.) Primary - secondary: mm or greater Primary - primary: mm or greater Primary - core: mm or greater Secondary - secondary: mm or greater Secondary - core: mm or greater. Withstand voltage (Please enter the voltage prescribed by the company.) Primary - secondary: AC (V) (min) (ma) Primary - core: AC (V) (min) (ma) Primary - primary: AC (V) (min) (ma) Secondary - core: AC (V) (min) (ma) Secondary - secondary: AC (V) (min) (ma). Please Enter the Power Devices to be Used. (Shindengen (MR), Rohm, Sanken (STR), Panasonic (IPD), PI, NSC, etc.) In addition, if there are recommended transformer specifications, etc., presented by the device manufacturer, please attach these separately. Manufacturer name: Product No.:. Mass production and prototyping information Final set name: Mass production requested price/currency: Necessity for local contents Necessary (manufactured by ) Not necessary Acceptance conditions of the above price, delivery location (FOB CHN, CIF LA., DDP Paris, etc.) Mass production: Mass production quantity pcs. /M Mass production location Mass production start time Prototyping time: Test production Test production Test production for Mass production Approval location. Required sample quantity pcs. Requested delivery time:. If there are any other requests (priorities in the company, size or price, etc.) or alterable items, please provide a description. TDK Corporation Magnetics Business Group, Business Promotions Dept. -, Nihonbashi -chome, Chuo-ku Tokyo 0-, Japan TEL: --0-, FAX: / 0000 / e_eco.fm

32 (0/0) Transformer for Switching Regulator Specification Request Form(For Home Appliances) Issued on / /. Company name Address. Department, applicant's name(including the sample-sending destination) Name: TEL/FAX: . Circuit system Person in Charge from Sales Promotion Dep.: Recorded Date / / Person in Charge from Sales Dep.: Recorded Date / / Prototype No: Recorded Date / / Flyback method Forward method Others. IC used IC maker IC model No. IC drive method Fied frequency method (PWM) Variable frequency method(rcc) Drive frequency Hz Hz Ma. duty % Or Ma. on-time µs Other input capacitor µf (If not specified, design will be performed using a value of ( )µf, which is times greater than the output power for 00V and worldwide transformers, and an output power of (. Input/output condition Input min. Vac ma. Vac Frequency Hz min. Vdc ma. Vdc )µf for 00V transformers.) Specifications Primary/Secondary Feedback Voltage(V) Current(A)typ. T measuring condition Current(A)ma. Diode forward voltage VF(V) Output Output Output Output Output Output Eample Motor Secondary Yes 0V( V) 0.A.0A(0sec.) 0.V(SBD) Eample IC Vcc Primary No V( V) 0.0A 0.0A.0V(FRD) (Rectifier diode F.R.D: First Recovery Diode, S.B.D: Schottky Barrier Diode) Request for connection method Yes No (When checking "Yes", please attach a drawing separately.) Pin assignments changes Possible Impossible. Outer dimensions of the transformer Ma. height L W mm ma.. Request Items (Enter any items that you would like to request such as priority conditions, size, price, or adjustable items.) (If not specified, design will be made according to the optimal size determined by our company.). Environment Operating temperature range C to C Ma. temperature rise C Ambient temperature C (Please enter the ambient temperature. If not entered, design will be made using the thermocouple method (C.C.)). Safety standard compliance Standard Electrical Appliances and Material Safety Act, Appendi UL0- IEC 0- Ed Insulation type Basic insulation Reinforced insulation Pollution degree (If not specified, design will be performed with a pollution degree of.) Safety distance Primary - secondary : mm Primary - core : mm Reference: creeping distance standard. Withstand voltage Primary - primary : Secondary - core : mm mm Secondary - secondary : Primary - secondary : Vac min Primary - primary : Vac min Secondary - secondary : Vac min Primary - core : Vac min Secondary - core : Vac min (Please enter the distance prescribed by the company.) 0. Mass production and prototyping information Final set name: Asking price Planned amount Approval location Delivery location Business terms CIF- Necessary samples Amount Requested delivery time: mm (Please enter the distance prescribed by the company.) Electrical appliances and material safety act IEC0- Applicable safety standards Appendi Ed. Insulation class Base Enhancement Base Enhancement Ground voltage or < Pollution level CTI Pollution level CTI line voltage (V) < a/b a/b Operating voltage (V) 0 < < < Plan Test production Test production Test production for Mass production Mass production TDK Corporation Magnetics Business Group, Business Promotions Dept. -, Nihonbashi -chome, Chuo-ku Tokyo 0-, Japan TEL: --0-, FAX: / 0000 / e_eco.fm