Description. Q1 2 B240 Ipk Rsc V Ref Reg

Transcription

1 Features Description Operation from.0v to 0V Input Low Standby Current Current Limiting Output Current to.a Output Voltage Adjustable Frequency Operation to 00 khz Precision % Reference Lead Free packages: SOP-L and PDIP-L (Note ) SOP-L: Available in Green Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note ) The AP0 Series is a monolithic control circuit containing the primary functions required for DC-to-DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series is specifically designed for incorporating in Step-Down and Step-Up and Voltage-Inverting applications with a minimum number of external components. Application Circuit () Step-Up Converter 0uH L 0 S Q Q R Q B0 Ipk Rsc 0. Osc Vin V 0 uf VCC _ Comp..V Ref Reg 0 pf R R 0k k 0uF CO V/00mA.0uH 00 Optional Filter Test Conditions Results Line Regulation V in = 9V to V, I O = 00mA 0mV = ±0.0% Load Regulation V in = V, I O = 0mA to 00mA mv = ±0.0% Output Ripple V in = V, I O = 00mA 00mV PP Efficiency V in = V, I O = 00mA 0% AP0 Rev. of JULY 009

2 Application Circuit (Continued) () Step-Down Converter SQ Q R Q Ipk Rsc 0. Osc B0 Vin V 0 uf VC C _ Comp..V Ref Reg 0 pf L 00uH R R k k 0uF CO.0V/00mA.0uH 00 Optional Filter Test Conditions Results Line Regulation V in = V to V, I O = 00mA 0mV = ±0.% Load Regulation V in = V, I O = 0mA to 00mA mv = ±0.0% Output Ripple V in = V, I O = 00mA 0mV PP Efficiency V in = V, I O = 00mA % AP0 Rev. of JULY 009

3 Application Circuit (Continued) () Voltage Inverting Converter S Q Q R Q Rsc 0. Ipk Osc L 00 uh Vin.V to.0v 0uF VC C _ Comp..V Ref Reg 0 pf B0 R R 0k k 0uF -V/00mA.0uH CO 00 Optional Filter Test Conditions Results Line Regulation V in =.V to.0v, I O = 00mA 0mV = ±0.0% Load Regulation V in =.0V, I O = 0mA to 00mA 0mV = ±0.% Output Ripple V in =.0V, I O = 00mA 00mV PP Efficiency V in =.0V, I O = 00mA 0% AP0 Rev. of JULY 009

4 Ordering Information AP 0 XX X - X Package S : SOP-L N : PDIP-L Lead Free L : Lead Free (Note ) G : Green Packing U : Tube : Tape & Reel Lead-free Lead-free Device Tube Tape and Reel Package Packaging Part Number Part Number Code (Note ) Quantity Quantity Suffix Suffix AP0SL- S SOP-L NA NA 00/Tape & Reel - AP0SG- S SOP-L NA NA 00/Tape & Reel - AP0NL-U N PDIP-L 0 - U NA NA Notes:. PDIP-L is available in Lead Free product only.. EU Directive 00/9/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at Pad layout as shown on Diodes Inc. suggested pad layout document AP000, which can be found on our website at Pin Assignment () SOP-L () PDIP-L ( Top View ) ( Top View ) Driver Driver Emitter I pk Sense Emitter I pk Sense Timing Capacitor Gnd VCC Comparator Inverting Input Timing Capacitor Gnd VCC Comparator Inverting Input AP0 Rev. of JULY 009

5 Maximum Ratings Notes: Symbol Parameter Value Unit V CC Power Supply Voltage 0 V V IR Comparator Input Voltage Range -0. ~ 0 V V C (switch) Voltage 0 V V E (switch) Emitter Voltage (V Pin = 0V) 0 V V CE (switch) to Emitter Voltage 0 V V C (driver) Driver Voltage 0 V I C (driver) Driver Current 00 ma I SW Current. A SOP: T A = C 00 mw P D Power Dissipation and Thermal Characteristics PDIP: T A = C. W θ JA Thermal Resistance 0 C/W T MJ Maximum Junction Temperature 0 C T OP Operating Junction Temperature Range 0 ~ 0 C T stg Storage Temperature Range - ~ 0 C. Maximum package power dissipation limits must be observed.. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. Electrical Characteristics (V CC =.0V, unless otherwise specified) Symbol Characteristics Min Typ. Max Unit OSCILLATOR f osc Frequency (V Pin = 0V, C T =.0nF, T A = C) khz I chg Charge Current (V CC =.0V to 0V, T A = C) 0 µa I dischg Discharge Current (V CC =.0V to 0V, T A = C) µa I dischg / I chg Discharge to Charge Current Ratio (Pin to V CC, T A = C)... - V ipk (sense) Current Limit Sense Voltage (I chg = I dischg, T A = C) mv OUTPUT SWITCH (Note ) V CE (sat) Saturation Voltage, Darlington Connection (I SW =.0A, Pins, connected) -.0. V V CE (sat) Saturation Voltage, Darlington Connection (I SW =.0A, ID = 0mA, Forced ß 0) V h FE DC Current Gain (I SW =.0A, V CE =.0V, T A = C) I C (off) Off-State Current (V CE = 0V) µa COMPARATOR V th Threshold Voltage V - T A = C T A = 0 o C ~ 0 o C Reg line Threshold Voltage Line Regulation (V CC =.0V to 0V) -..0 mv TOTAL DEVICE I CC Supply Current (V CC =.0V to 0V, C T =.0nF, Pin = V CC, V Pin > V th Pin = Gnd, remaining pins open) - -. ma AP0 Rev. of JULY 009

6 Representative Schematic Diagram Drive S Q Q Ipk Sense R 00 Q Emitter Ipk Oscillator VCC Comparator Timing Capacitor _.V Reference Regulator Comparator Inverting Input Gnd (Bottom View) AP0 Rev. of JULY 009

7 Typical Performance Characteristics Figure. Vce(sat) versus le Figure. Reference Voltage versus Temp. Vce(sat), Saturation Voltage (V).. 0. Reference Voltage (V) Ie, Emitter Current (A) Temperature ( o C) 0 Figure. Current Limit Sense Voltage versus Temperature.0 Figure. Standby Supply Current versus Supply Voltage Current Sense Voltage (mv) Temperature ( o C) Icc, Supply Current (ma) Vcc, Supply Voltage (V) VCE (sat), (V) Figure. Emitter Follower Configuration Output Saturation Voltage vs. Emitter Current Vcc=~0V Pin,,=Vcc Pin,=GND T A = o C Pin= 0W I E(mA) ton-off, Output On-Off Time(us) Figure.Output On-Off Time versus Oscillator Timing Capacitor V CC =.0V Pin = V CC Pin = GND T A = o C t on t off C T, Oscillator Timing Capacitor (nf) AP0 Rev. of JULY 009

8 Design Formula Table Calculation Step-Up Step-Down Voltage-Inverting V out V F -V in (min) v out v F Iv out l v F t on / t off V in (min) - V sat v in(min) - v sat - v out V in - v sat ( t on t off ) /f /f /f t on t off t on t off t on t off t off t on t on t off t off t off t on t on ( t on t off ) - t off ( t on t off ) - t off ( t on t off ) - t off C T t on t on t on I pk (switch) I out (max) (t on / t off ) I out (max) I out (max) (t on / t off ) R sc 0. / I pk (switch) 0. / I pk (switch) 0. / I pk (switch) L (min) ( V in (min) V sat ) t on (max) ( V in (min) V sat -V out ) ton (max) ( V in (min) V sat ) I pk (switch) I pk (switch) I pk (switch) I out t on I pk (switch) ( t off t on ) I out t on C O 9 V ripple (pp) V ripple (pp) 9 V ripple (pp) t on (max) V sat = Saturation voltage of the output switch. V F = Forward voltage drop of the output rectifier. The following power supply characteristics must be chosen: V in - Nominal input voltage. V out - Desired output voltage, V out =. (R/R) I out - Desired output current. f min - Minimum desired output switching frequency at the selected values of V in and I o. V ripple(pp) - Desired peak-to-peak output ripple voltage. In practice, the calculated capacitor value will need to be increased due to its equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and load regulation. AP0 Rev. of JULY 009

9 Marking Information () SOP-L Logo Part No. ( Top View ) AP0 YY WW X X L : Lead Free G : Green Internal code Xth week = 0~ Year : "0" = 00 "09" = 009 ~ () PDIP-L Logo Part No. ( Top View ) AP0 YY WW X X L : Lead Free Internal code Xth week = 0~ Year : "0" = 00 "09" = 009 ~ AP0 Rev. 9 of JULY 009

10 Package Information (All Dimensions in mm) () SOP-L./.9.90/.0 0.0/ Gauge Plane Seating Plane 0./0. Detail "A" ~9 0.max. ~9.0/.0.max. 0./0. Detail "A" 0 /.typ 0./0../.9 x-0.0. x-. x-. Land Pattern Recommendation (Unit: mm) () PDIP-L AP0 Rev. 0 of JULY 009

11 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDIION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which:. are intended to implant into the body, or. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright 009, Diodes Incorporated AP0 Rev. of JULY 009