STV9382 ® OPTIMWATTTM Class-D Vertical Deflection Amplifier for 1.5 Amp TV Applications Main Features ■ High-Efficiency OPTIMWATTTM Power Amplifier ■ No Heatsink ■ Split Supply ■ Internal Flyback Generator ■ Output Current up to 1.5 APP ■ Suitable for DC Coupling Applications ■ Few External Components ■ Protection against Low V CC Description Designed for TV applications, the OPTIMWATTTM STV9382 is a Class-D vertical deflection booster assembled in a 20-pin plastic DIP package. It belongs to the OPTIMWATTTM Class-D vertical deflection booster family. It operates with supplies up to ±18 V and provides an output current up to 1.5 APP to drive the yoke. The internal flyback generator avoids the need for an extra power supply. June 2004 Revision 1.4 PDIP 20 Order Code: STV9382 -VCC 1 20 -VCC -VCC 2 19 -VCC -VCC 3 18 -VCC OUT 4 17 -VCCPOW CFLY + 5 16 + VCCPOW CFLY - 6 15 +VCC BOOT 7 14 EAout FEEDCAP1 8 13 IN+ 9 12 IN- 10 11 SGND FEEDCAP FREQ 1/10 OPTIMWATTTM STV9382 Pin Functions 1 Pin Functions Table 1: STV9382 Pin Descriptions Pin Name 1 -VCC 2 Pin Name Negative Supply 11 SGND -VCC Negative Supply 12 IN- Error Amplifier Inverting Input 3 -VCC Negative Supply 13 IN+ Error Amplifier Non-inverting Input 4 OUT PWM Output 14 EA out 5 CFLY+ Flyback Capacitor 15 +VCC 6 CFLY- Flyback Capacitor 16 +V CCPOW Positive Power Supply 7 BOOT Bootstrap Capacitor 17 -VccPOW Negative Power Supply 8 FEEDCAP1 Feed-back Integrating Capacitor 18 -V CC Negative Supply 9 FEEDCAP Feed-back Integrating Capacitor 19 -V CC Negative Supply 10 FREQ Frequency Setting Capacitor 20 -V CC Negative Supply 2 Function Function Signal Ground Error Amplifier Output Positive Supply Functional Description The STV9382 is a vertical deflection circuit operating in Class D. Class D is a modulation method where the output transistors work in switching mode at high frequency. The output signal is restored by filtering the output square wave with an external LC filter. The major interest of this IC is the comparatively low power dissipation in regards to traditional amplifiers operating in class AB, eliminating the need of an heatsink. Except for the output stage which uses Class D modulation, the circuit operation is similar to the one of a traditional linear vertical amplifier. A (sawtooth) reference signal has to be applied to the circuit which can accept a differential or single ended signal. This sawtooth is amplified and applied as a current to the deflection yoke. This current is measured by means of a low value resistor. The resulting voltage is used as a feedback signal to guarantee the conformity of the yoke current with the reference input signal. The overvoltage necessary for a fast retrace is obtained with a chemical capacitor charged at the power supply voltage of the circuit. At the flyback moment, this capacitor is connected in series with the output stage power supply. This method, used for several years with the linear vertical boosters and called “internal flyback” or “flyback generator”, avoids the need of an additional power supply, while reducing the flyback duration. The circuit uses a BCD process that combines Bipolar, CMOS and DMOS devices. The output stage is composed of low-RON N-channel DMOS transistors. 2/10 1kΩ 10kΩ 14 12 13 _ + +VCC 330pF 220pF 10 Modulator Output Drive FREQ 17 150Ω OUT BOOT CFLY- CFLY+ 1000µF -VCC power -VCC 100nF -VCC 4 7 6 5 +VCC power STV9382 Flyback Generator 16 1000µF Pins 1 ,2 ,3 ,18 ,19 and 20 -VCC Flyback Detection 11 8 9 SGND FEEDCAP1 FEEDCAP EA out IN - VREF 15 100nF * Deflection yoke characteristics: R = 9Ω, L = 12mH fVERT = 50 Hz Input signal 1kΩ IN+ 100nF +VCC 560pF 470nF 1mH Cboot 220nF CFLYBACK 100µF 56Ω 1µF 0.9Ω Deflection Yoke* OPTIMWATTTM STV9382 Functional Description Figure 1: Test and Application Circuit Diagram 3/10 OPTIMWATTTM STV9382 Absolute Maximum Ratings Figure 2: Thermal Resistance with “On-board” Square Heatsink vs. Copper Area RthJA (°C/W) Copper Area 35 µm Thickness 70 PC Board 60 50 40 0 3 4 8 12 Area (cm²) Absolute Maximum Ratings Symbol VCC Parameter DC Supply Voltage TSTG, TJ Storage and Junction Temperature Value Unit ±20 V -40 to +150 °C 0 to +70 °C TOP Operating Temperature Range VESD ESD Susceptibility - Human Body Model (100 pF discharge through 1.5 kΩ) (see Note 1) ±2 kV IOUT Output current ±1 A VOUT Maximum output voltage (pin 4) with respect to -Vcc (pins 1, 2, 3, 18, 19 and 20) and during flyback (see Note 2) 80 V Note: 1 Except pin 6 (+1.4kV/-2kV) 2 During the flyback with V CC = ±18 V, the maximum output voltage (pin 4) is close to 72 V, with respect to -V CC (pins 1, 2, 3, 18, 19 and 20). 4 Thermal Data Symbol RthJA Parameter Junction-to-Ambient Thermal Resistance Value Unit 70 °C/W Pins 1, 2, 3, 18, 19 and 20 are internally connected together and participate in heat evacuation. 4/10 OPTIMWATTTM STV9382 5 Electrical Characteristics Electrical Characteristics TAMB = 25° C, VCC = ±12 V and fVERT = 50 Hz unless otherwise specified (refer to Figure 1) Symbol Parameter Test Conditions Min. Typ. Max. Units +VCC Positive Supply Range +10 +18 V -VCC Negative Supply Range -18 -10 V ∆VCC Maximum recommended difference between +VCC and |-VCC| ±4 V VCCSTART Low VCC Detection IQ Quiescent Supply Current IY Maximum Vertical Yoke Current I13, I12 Input Voltage = 0 ±6.5 V 8.5 mA ±0.75 Amplifier Input Bias Current A µA -0.1 VOS Output Offset Voltage Note 1 SVR Supply Voltage Rejection Note 2 70 dB Fly THR Flyback Detection Threshold (Positive Slope) V(14) 1.5 V FlyTHF Flyback Detection Threshold (Negative Slope) V(14) 0.5 V PD Integrated Circuit Dissipated Power Note 3 0.6 W fSW Switching Frequency CFREQ = 220 pF fSW-OP Switching Frequency Operative Range CFREQ Frequency Controller Capacitor Range -50 120 +50 155 100 Pin 10 180 220 mV 200 kHz 220 kHz 240 pF Note: 1 Input voltage = 0, measured after the filter (e.g. across the 470 nF filter capacitor) 2 Supply rejection of the positive or negative power supply. V CC ripple =1 VPP and f =100 Hz, measured on the sense resistor. 3 Power dissipated in the circuit in the case of the application from Figure 1 and the current in the deflection yoke adjusted to 1.5 A PP . The corresponding power dissipated in the vertical deflection yoke is 1.7 W. 5/10 OPTIMWATTTM STV9382 I/O Waveforms 6 I/O Waveforms The following waveforms are obtained with the schematic diagram given in Figure 1: Test and Application Circuit Diagram: Figure 3: Current in the Deflection Yoke (Calibration: 0.5 A/div.) Figure 4: Current and Voltage in the Deflection Yoke during Flyback (Calibration: 0.5A/div, 10 V/div) 6/10 OPTIMWATTTM STV9382 I/O Waveforms Figure 5: Current in the Deflection Yoke and Voltage at the Error Amplifier Output (pin 14 - STV9382) during Flyback (Calibration: 0.5 A/div, 1 V/div) Figure 6: Current in the Deflection Yoke and Voltage at the Output of the STV9382 (pin 4), during the Flyback (Calibration: 0.5 A/div, 10 V/div) 7/10 OPTIMWATTTM STV9382 Package Mechanical Data 7 Package Mechanical Data Figure 7: 20-Pin Plastic Dual In-Line Package, 300-mil Width K1 e4 K2 A2 A G L A1 S C E1 e b2 e3 e1 b D Table 2: DIP20 Package mm inches Dim. Min. Typ. A Max. Min. 5.33 Max. 0.210 A1 0.38 A2 2.92 3.30 4.95 0.115 0.130 0.195 b 0.36 0.46 0.56 0.014 0.018 0.022 b2 1.14 1.52 1.78 0.045 0.060 0.070 c 0.20 0.25 0.36 0.008 0.010 0.014 D 24.89 26.92 0.980 e 0.015 2.54 1.060 0.100 E1 6.10 6.35 7.11 0.240 0.250 0.280 L 2.92 3.30 3.81 0.115 0.130 0.150 Number of Pins N 8/10 Typ. 20 OPTIMWATTTM STV9382 Package Mechanical Data Figure 8: ESD Protection Structure 7.1 Change Required on Application Between STV9380/80A/81/83 and STV9382 The STV9380/80A/81/83 and STV9382 are nearly pin to pin compatible except with regards to pins 8,9 and 10. The following application schematic shows the differences: 9/10 OPTIMWATTTM STV9382 Revision History 8 Revision History Table 3: Summary of Modifications Version Date Description 1.0 May 2002 1.1 14 October 2002 1.2 23 September 2003 1.3 October 2003 1.4 June 2004 First Issue. Modification of Figure 1: Test and Application Circuit Diagram and Section 7: Package Mechanical Data. Updated Chapter 5: Electrical Characteristics on page 5. Inclusion of Chapter 6: I/ O Waveforms on page 6, Figure 8: ESD Protection Structure on page 9 and Section 7.1: Change Required on Application Between STV9380/80A/81/83 and STV9382 on page 9 Included OPTIMWATTTM information. Added Note 1 on page 4. Removed all references to Monitors. Removed references to ST Confidential. OPTIMWATTTM is a ST deposited trademark for product features allowing optimization of power efficiency at chip/application level Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners © 2004 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 www.st.com 10/10