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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
PDIP 20 Order Code: STV9382
-VCC
1 2 3 4 5 6
20 19 18 17 16 15 14 13 12 11
-VCC -VCC -VCC -VCCPOW + VCCPOW +VCC EAout IN+ INSGND
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.
-VCC -VCC OUT CFLY + CFLY BOOT FEEDCAP1 FEEDCAP FREQ
7
8 9 10
June 2004
Revision 1.4
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Pin Functions
OPTIMWATTTM STV9382
1
Pin Functions
Table 1: STV9382 Pin Descriptions
Pin
1 2 3 4 5 6 7 8 9 10
Name
-VCC -VCC -VCC OUT CFLY+ CFLYBOOT FEEDCAP1 FEEDCAP FREQ
Function
Negative Supply Negative Supply Negative Supply PWM Output Flyback Capacitor Flyback Capacitor Bootstrap Capacitor Feed-back Integrating Capacitor Feed-back Integrating Capacitor Frequency Setting Capacitor
Pin
11 12 13 14 15 16 17 18 19 20
Name
SGND ININ+ EA out +VCC +V CCPOW -VccPOW -V CC -V CC -V CC
Function
Signal Ground Error Amplifier Inverting Input Error Amplifier Non-inverting Input Error Amplifier Output Positive Supply Positive Power Supply Negative Power Supply Negative Supply Negative Supply Negative Supply
2
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.
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+VCC
100nF 100nF +VCC 16 +VCC power STV9382 CFLY+ CFLYBACK 100F -VCC 1000F
OPTIMWATTTM STV9382
15
5 6 CFLYBOOT 7
VREF
Flyback Detection Flyback Generator
IN+ + _ 150 Pins 1 ,2 ,3 ,18 ,19 and 20 10 17 FREQ 100nF -VCC -VCC power 1000F 220pF Modulator 4 Output Drive OUT 1mH
13
Cboot 220nF 1F 470nF 56 Deflection Yoke*
1k
IN -
12
Input signal
EA out
14
10k
1k 330pF
11 8 9 SGND FEEDCAP1 FEEDCAP
560pF 0.9
Figure 1: Test and Application Circuit Diagram
-VCC
* Deflection yoke characteristics: R = 9, L = 12mH fVERT = 50 Hz
Functional Description
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Absolute Maximum Ratings
OPTIMWATTTM STV9382
Figure 2: Thermal Resistance with "On-board" Square Heatsink vs. Copper Area
RthJA (C/W)
Copper Area 35 m Thickness
70
60
PC Board
50
40 0 4 8 12 Area (cm)
3
Absolute Maximum Ratings
Parameter
DC Supply Voltage Storage and Junction Temperature Operating Temperature Range ESD Susceptibility - Human Body Model (100 pF discharge through 1.5 k) (see Note 1) Output current Maximum output voltage (pin 4) with respect to -Vcc (pins 1, 2, 3, 18, 19 and 20) and during flyback (see Note 2)
Symbol
VCC TSTG, TJ TOP VESD IOUT VOUT
Value
20 -40 to +150 0 to +70 2 1 80
Unit
V C C kV A 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
Parameter
Junction-to-Ambient Thermal Resistance
Symbol
RthJA
Value
70
Unit
C/W
Pins 1, 2, 3, 18, 19 and 20 are internally connected together and participate in heat evacuation.
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OPTIMWATTTM STV9382
Electrical Characteristics
5
Electrical Characteristics
TAMB = 25 C, VCC = 12 V and fVERT = 50 Hz unless otherwise specified (refer to Figure 1)
Symbol
+VCC -VCC VCC VCCSTART IQ IY I13, I12 VOS SVR Fly THR FlyTHF PD fSW fSW-OP CFREQ
Parameter
Positive Supply Range Negative Supply Range Maximum recommended difference between +VCC and |-VCC| Low VCC Detection Quiescent Supply Current Maximum Vertical Yoke Current Amplifier Input Bias Current Output Offset Voltage Supply Voltage Rejection Flyback Detection Threshold (Positive Slope) Flyback Detection Threshold (Negative Slope) Integrated Circuit Dissipated Power Switching Frequency Switching Frequency Operative Range Frequency Controller Capacitor Range
Test Conditions
Min.
+10 -18
Typ.
Max.
+18 -10 4
Units
V V V V mA
6.5 Input Voltage = 0 8.5 0.75 -0.1 Note 1 Note 2 V(14) V(14) Note 3 CFREQ = 220 pF 120 100 Pin 10 180 220 -50 70 1.5 0.5 0.6 155 200 220 240 +50
A
A
mV dB V V W kHz kHz 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.
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I/O Waveforms
OPTIMWATTTM STV9382
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)
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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)
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Package Mechanical Data
OPTIMWATTTM STV9382
7
Package Mechanical Data
Figure 7: 20-Pin Plastic Dual In-Line Package, 300-mil Width
K1 K2 A2 A
e4
G A1 S b2 e3 D b e L C E1 e1
Table 2: DIP20 Package mm Dim. Min.
A A1 A2 b b2 c D e E1 L 6.10 2.92 0.38 2.92 0.36 1.14 0.20 24.89 2.54 6.35 3.30 7.11 3.81 0.240 0.115 3.30 0.46 1.52 0.25 4.95 0.56 1.78 0.36 26.92
inches Max.
5.33 0.015 0.115 0.014 0.045 0.008 0.980 0.100 0.250 0.130 0.280 0.150 0.130 0.018 0.060 0.010 0.195 0.022 0.070 0.014 1.060
Typ.
Min.
Typ.
Max.
0.210
Number of Pins N 20
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OPTIMWATTTM STV9382
Figure 8: ESD Protection Structure
Package Mechanical Data
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:
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Revision History
OPTIMWATTTM STV9382
8
Revision History
Table 3: Summary of Modifications Version
1.0 1.1 1.2
Date
May 2002 14 October 2002 23 September 2003 First Issue.
Description
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.
1.3 1.4
October 2003 June 2004
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 (c) 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
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