STV9383 ® Class-D Vertical Deflection Amplifier for 2.0 Amp TV and Monitor Applications Main Features ■ High-Efficiency Power Amplifier ■ No Heatsink ■ Split Supply ■ Internal Flyback Generator ■ Output Current up to 2.0 APP ■ Suitable for DC Coupling Applications ■ Few External Components ■ Protection against Low VCC PDIP 20 Order Code: STV9383 Description Designed for TV and monitor applications, the STV9383 is a Class-D vertical deflection booster assembled in a 20-pin plastic DIP package. It operates with supplies up to ±18 V and provides an output current up to 2.0 APP to drive the yoke. The internal flyback generator avoids the need for an extra power supply. -VCC 1 20 -VCC -VCC 2 19 -VCC -VCC 3 18 -VCC OUT 4 17 -VCC POW CFLY + 5 16 + VCC POW CFLY - 6 15 +VCC BOOT 7 14 EAout VREG 8 13 IN+ 9 12 10 11 INSGND FEEDCAP FREQ October 2003 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. 1/10 Pin Functions 1 STV9383 Pin Functions Table 1: STV9383 Pin Descriptions Pin Name 1 -VCC 2 Function Pin Name Function 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 +VCCPOW Positive Power Supply 7 BOOT Bootstrap Capacitor 17 -VccPOW Negative Power Supply 8 VREG Internal Voltage Regulator 18 -VCC Negative Supply 9 FEEDCAP Feed-back Integrating Capacitor 19 -VCC Negative Supply 10 FREQ Frequency Setting Resistor 20 -VCC Negative Supply Signal Ground Error Amplifier Output Positive Supply Note 1. The voltage reference, accessible on pin 8, is for internal use only. No additional components should be connected to this pin except the decoupling capacitor. 2 Functional Description The STV9383 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-R ON N-channel DMOS transistors. 2/10 STV9383 +VCC 100nF 1000µF 100nF 15 -VCC +VCC 16 +VCC power STV9383 STV9383 VREG 8 Flyback Detection VREF 100nF Flyback Generator CFLY+ 5 6 CFLYBACK 100µF CFLYBOOT IN+ 1 kΩ IN - + Output Drive Modulator _ 12 Input Signal Cboot 220nF 7 13 OUT 4 EA out 1mH 150Ω 470nF 14 10kΩ 1kΩ Deflect. Yoke* 200Ω Pins 1, 2, 3, 18, 19 and 20 9 11 SGND 10 FEEDCAP 560pF 17 FREQ -VCC -VCC power 470pF 4.7nF 10kΩ 100nF * Deflection yoke characteristics: R = 5.5Ω, L = 7mH 1000µF Sense Resistor 0.5Ω 3/10 Functional Description -VCC fVERT = 50 Hz 150Ω Figure 1: Test and Application Circuit Diagram -VCC Absolute Maximum Ratings STV9383 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 TOP Operating Temperature Range VESD ESD Susceptibility - Human Body Model (100 pF discharge through 1.5 kΩ) IOUT Output current VOUT Maximum output voltage (pin 4) with respect to -Vcc (pins 1, 2, 3, 18, 19 and 20) and during flyback (see Note 1) Value Unit ±20 V -40 to +150 °C -20 to +70 °C ±2 kV ±1.3 A 80 V Note 1. During the flyback with VCC = ±18 V, the maximum output voltage (pin 4) is close to 72 V, with respect to -VCC (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 STV9383 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 +V CC 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 14 mA ±1 Amplifier Input Bias Current A µA -0.1 VOS Output Offset Voltage Note 1 SVR Supply Voltage Rejection Note 2 82 dB FlyTHR 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 0.85 W fSW Switching Frequency RFREQ = 10 kΩ fSW-OP Switching Frequency Operative Range RFREQ Frequency Controller Resistor Range -50 120 +50 140 100 Pin 10 7 10 mV 160 kHz 200 kHz 14 kΩ 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. VCC ripple =1 VPP , 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 2 APP. The corresponding power dissipated in the vertical deflection yoke is 1.8 W. 5/10 I/O Waveforms 6 STV9383 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 STV9383 I/O Waveforms Figure 5: Current in the Deflection Yoke and Voltage at the Error Amplifier Output (pin 14 - STV9383) during Flyback (Calibration: 0.5 A/div, 1 V/div) Figure 6: Current in the Deflection Yoke and Voltage at the Output of the STV9383 (pin 4), during the Flyback (Calibration: 0.5 A/div, 10 V/div) 7/10 Package Mechanical Data 7 STV9383 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 STV9383 Package Mechanical Data Figure 8: ESD Protection Structure 9/10 Revision History 8 STV9383 Revision History Table 3: Summary of Modifications Version Date Description 0.1 September 2003 First Draft 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. 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