STV8172A. Vertical deflection booster for 3 App TV/monitor applications with 70 V flyback generator. Features. Description STV8172A.
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1 STV82A Vertical deflection booster for 3 App TV/monitor applications with 0 V flyback generator Features Figure. Heptawatt package Power amplifier Flyback generator Stand-by control Output current up to 3.0 App Thermal protection Description Designed for monitors and high performance TVs, the STV82A vertical deflection booster delivers flyback voltages up to 0V. The STV82A operates with supplies up to 35V and provides up to 3 A PP output current to drive the yoke. The STV82A is offered in a Heptawatt plastic package. In double-supply applications, a stand-by state will be reached by stopping the (+) supply alone. Figure 2. Tab connected to pin Heptawatt (Plastic Package) ORDER CODE: STV82A STV82A pin detail Input (Non Inverting) Output Stage Supply Output Ground Flyback Generator Supply Voltage Input (Inverting) Output Stage Supply 6 Flyback Generator 3 Supply Voltage 2 Non-Inverting Input Inverting Input + Power Amplifier - Thermal Protection Flyback Generator 5 Output STV82A Ground or Negative Supply November 2008 Rev /9
2 Contents STV82A Contents Absolute maximum ratings Thermal data Electrical characteristics Application hints DC-coupled application Application hints Ripple rejection AC-coupled applications Application hints Application with differential-output drivers Centering Peak current Ripple rejection Secondary breakdown diagrams Mounting instructions Pin configuration Package mechanical data Lead-free packaging Revision history /9
3 STV82A Absolute maximum ratings Absolute maximum ratings Table. Absolute maximum ratings Symbol Parameter Value Unit Voltage V S Supply voltage (pin 2) - Note and Note 2 0 V V 5, V 6 Flyback peak voltage - Note 2 0 V V 3 Voltage at Pin 3 - Note 2, Note 3 and Note 6-0. to (V S + 3) V V, V Amplifier input voltage - Note 2, Note 6 and Note - 0. to (V S + 2) or +0 V Current I 0 () Output peak current at f = 50 to 200 Hz, t 0µs - Note ±5 A I 0 (2) Output peak current non-repetitive - Note 5 ±2 A I 3 Sink Sink current, t<ms - Note 3 2 A I 3 Source Source current, t < ms 2 A I 3 Flyback pulse current at f=50 to 200 Hz, t 0μs - Note ±5 A ESD Susceptibility ESD Human body model (00 pf discharged through.5 kω) 2 kv ESD2 EIAJ standard (200 pf discharged through 0 Ω) 300 V Temperature T s Storage temperature -0 to 50 C T j Junction temperature +50 C Note: Usually the flyback voltage is slightly more than 2 x VS. This must be taken into consideration when setting V S. 2 Versus pin 3 V3 is higher than V S during the first half of the flyback pulse. Such repetitive output peak currents are usually observed just before and after the flyback pulse. 5 This non-repetitive output peak current can be observed, for example, during the Switch- On/Switch-Off phases. This peak current is acceptable providing the SOA is respected (Figure 0 and Figure ). 6 All pins have a reverse diode towards pin, these diodes should never be forward-biased. Input voltages must not exceed the lower value of either V S + 2 or 0 volts. 3/9
4 Thermal data STV82A 2 Thermal data Table 2. Thermal data Symbol Parameter Value Unit R thjc Junction-to-case thermal resistance 3 C/W T T Temperature for thermal shutdown 50 C T J Recommended max. junction temperature 20 C /9
5 STV82A Electrical characteristics 3 Electrical characteristics V S = 3 V, T AMB = 25 C, unless otherwise specified. Table 3. Electrical characteristics Symbol Parameter Test Conditions Min. Typ. Max. Unit Figure Supply Operating supply voltage V S See note below () 0 35 V range (V 2 -V ) I 2 Pin 2 quiescent current I 3 = 0, I 5 = ma Figure 3 I 6 Pin 6 quiescent current I 3 = 0, I 5 = 0, V 6 =35v ma Figure 3 Input I Input bias current V = V, V = 2.2 V µa Figure 3 I Input bias current V = 2.2 V, V = V µa V IR Operating input voltage range 0 V S - 2 V V I0 Offset voltage 2 mv ΔV I0 /dt Output Offset drift versus temperature 0 µv/ C I 0 Operating peak output current 0 o <T case <25 o C ±.25 A V 5L V 5H Standby Output saturation voltage to pin Output saturation voltage to pin 6 I 5 =.25 A V Figure 5 I 5 = -.25 A V Figure V 5STBY Output voltage in standby V = V = V s = 0 (2) Figure 6 Miscellaneous G Voltage gain 80 db Diode forward voltage V D5-6 I between pins =.25 A.5 2. V V D3-2 Diode forward voltage between pins 3-2 I 3 =.25 A.5 2. V V 3SL Saturation voltage on pin 3 I 3 = 20 ma 0. V Figure 5 Saturation voltage to pin 2 V 3SH (2nd part of flyback) I 3 = -.25 A V. In normal applications, the peak flyback voltage is slightly greater than 2 x (V S - V ). Therefore, (V S - V ) = 35 V is not allowed without special circuitry. 2. Refer to Figure 6, standby condition. 5/9
6 Electrical characteristics STV82A Figure 3. Measurement of I, I 2 and I 6 +Vs I2 I V STV82A 5 S 39kΩ (a) (b) (a): I2 and I6 measurement (b): I measurement V I 5.6kΩ Figure. Measurement of V 5H +Vs 2 6 V 5H 2.2V STV82A 5 V - I5 Figure 5. Measurement of V 3L and V 5L 2 6 +Vs I3 or I5 V STV82A 3 (b) (a) 2.2V 5 V 3L V 5L (a): V 5L measurement (b): V 3L measurement 6/9
7 STV82A Application hints Application hints The yoke can be coupled either in AC or DC.. DC-coupled application When DC coupled (see Figure 6), the display vertical position can be adjusted with input bias. On the other hand, 2 supply sources (V S and -V EE ) are required. A standby state will be reached by switching OFF the positive supply alone. In this state, where both inputs are the same voltage as pin 2 or higher, the output will sink negligible current from the deviation coil. Figure 6. DC-coupled application 0µF 0.µF C F ( to 00µF) +Vs Output Voltage Vertical Position Adjustment Vref Power Amplifier Flyback Generator 5 Output Current I p V M R3 - Thermal Safety.5Ω Rd(*) Yoke Ly V m -V EE 0.22µF 0µF 0.µF R2 R (*) recommended: Ly Ly < R d < μs 20μs /9
8 Application hints STV82A.. Application hints For calculations, treat the IC as an op-amp, where the feedback loop maintains V = V. Centering Display will be centered (null mean current in yoke) when voltage on pin is (R is negligible): V M + V m R V = R 2 + R 3 Peak current ( V M V m ) I P = R R xr 3 Example: for V m =2V, V M = 5 V and I P =A Choose R in the Ω range, for instance R = Ω From equation of peak current: R = R 3 2 I P R = V M V m Then choose R 2 or R 3. For instance, if R 2 = 0 kω, then R 3 = 5 kω Finally, the bias voltage on pin should be: V M + V m V = = 2 R R =.V 2.5 8/9
9 STV82A Application hints..2 Ripple rejection When both ramp signal and bias are provided by the same driver IC, you can gain natural rejection of any ripple caused by a voltage drop in the ground (see Figure ), if you manage to apply the same fraction of ripple voltage to both booster inputs. For that purpose, arrange an intermediate point in the bias resistor bridge, such that (R 8 / R ) = (R 3 / R 2 ), and connect the bias filtering capacitor between the intermediate point and the local driver ground. Of course, R should be connected to the booster reference point, which is the ground side of R. Figure. Ripple rejection Reference Voltage 6 Power Amplifier 3 2 Flyback Generator + R 9 R 8 R 5 - Thermal Safety Rd Yoke Ly Ramp Signal R 3 R 2 R Driver Ground Source of Ripple 9/9
10 Application hints STV82A.2 AC-coupled applications In AC-coupled applications (see Figure 8), only one supply (V S ) is needed. The vertical position of the scanning cannot be adjusted with input bias (for that purpose, usually some current is injected or sunk with a resistor in the low side of the yoke). Figure 8. AC-coupled application 0µF 0.µF C F ( to 00µF) +Vs Output Voltage 6 Power Amplifier 3 2 Flyback Generator Output Current I p + 5 V M R 3 - Thermal Safety.5Ω Rd(*) Yoke Ly V m 0.22µF R 5 C s R C L (*) recommended: Ly Ly < R d < μs 20μs R 2 R.2. Application hints Gain is defined as in the previous case: V V M m I p = R R R 3 Choose R then either R 2 or R 3. For good output centering, V must fulfill the following equation: V S V M + V m V V V = R + R 5 R 3 R 2 0/9
11 STV82A Application hints or V = R 3 R R 2 + R 5 V S V M + V m R ( + R 5 ) 2 R 3 C S performs an integration of the parabolic signal on C L, therefore the amount of S correction is set by the combination of C L and C s..3 Application with differential-output drivers Certain driver ICs provide the ramp signal in differential form, as two current sources i + and i with opposite variations. Figure 9. Using a differential-output driver 0µF 0.µF C F ( to 00µF) +Vs Output Voltage Differential output driver IC -V EE 6 Power Amplifier 3 2 Flyback Generator i p + i cm + R 5 - Thermal Safety.5Ω -i i p - cm 0.22µF Output Current Rd(*) I p Yoke Ly 0µF 0.µF R 2 (*) recommended: Ly Ly < R d < μs 20μs R Some definitions: i cm is the common-mode current: i cm = --i ( i - ) at peak of signal, i + =i cm +i p and i =i cm -i p, therefore the peak differential signal is i p -(-i p )=2i p, and the peak-peak differential signal, i p. The application is described in Figure 9 with DC yoke coupling. The calculations still rely on the fact that V remains equal to V. /9
12 Application hints STV82A.3. Centering When idle, both driver outputs provide i cm and the yoke current should be null (R is negligible), hence: i cm R = i cm R 2 therefore R = R Peak current Scanning current should be I P when positive and negative driver outputs provide respectively i cm -i p and i cm +i p, therefore ( i cm i) R = I p R + ( i cm + i) R 2 and since R = R 2 I p ---- i = 2R R Choose R in the Ω range, the value of R 2 = R follows. Remember that i is one-quarter of driver peak-peak differential signal! Also check that the voltages on the driver outputs remain inside allowed range. Example: for i cm = 0.mA, i = 0.2mA (corresponding to 0.8mA of peak-peak differential current), I p =A Choose R = 0.5Ω, it follows R 2 = R =.85kΩ..3.3 Ripple rejection Make sure to connect R directly to the ground side of R. 2/9
13 STV82A Application hints.3. Secondary breakdown diagrams Figure 0. Output transistor safe operating area (SOA) for secondary breakdown The diagram has been arbitrarily limited to max I0 (2A). Figure. Secondary breakdown temperature derating curve (ISB = secondary breakdown current) 3/9
14 Mounting instructions STV82A 5 Mounting instructions The power dissipated in the circuit is removed by adding an external heatsink. With the Heptawatt package, the heatsink is simply attached with a screw or a compression spring (clip). A layer of silicon grease inserted between heatsink and package optimizes thermal contact. In DC-coupled applications we recommend to use a silicone tape between the device tab and the heatsink to electrically isolate the tab. Figure 2. Mounting examples /9
15 STV82A Pin configuration 6 Pin configuration Figure 3. Pins and 2 Figure. Pins 3, 5 and /9
16 Package mechanical data STV82A Package mechanical data Figure 5. -pin Heptawatt package L L E M A C D L2 D M H2 L5 L3 E F E L9 V H3 G G G2 Dia. L0 L H2 F L L L6 Table. Heptawatt package Dim. mm inches Min. Typ. Max. Min. Typ. Max. A C D D E E F /9
17 STV82A Package mechanical data Table. Heptawatt package (continued) Dim. mm inches G G G H H L L L L L L L L L L L M M V 0 (Typ.) Dia Lead-free packaging To meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD9. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: /9
18 Revision history STV82A 8 Revision history Table 5. Document revision history Date Revision Changes August 2003 First issue. November Datasheet status changed to preliminary data. December Modification to Figure 3. June Datasheet status changed to datasheet. February Updated Figure 9. March Status changed to datasheet. 3-Nov-2008 Section. added, new template applied. 8/9
19 STV82A Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ( ST ) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 9/9
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