Document
TDA8172
TV VERTICAL DEFLECTION OUTPUT CIRCUIT
FEATURES s Power Amplifier s Flyback Generator s Thermal Protection
DESCRIPTION The TDA8172 is a monolithic integrated circuit in HeptawattTM package. It is a high efficiency power booster for direct driving of vertical windings of TV yokes. It is intended for use in color and black & white television as well as in monitors and displays.
PIN CONNECTION (top view)
HEPTAWATT (Plastic Package) ORDER CODE: TDA8172
BLOCK DIAGRAM
October 2003
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TDA8172
1 ABSOLUTE MAXIMUM RATINGS
Symbol
VS V5, V6
V3 V1, V7
I0 I0 I0 I3 I3 I3 Ptot Tstg, Tj
Parameter Supply Voltage (pin 2) Flyback Peak Voltage Voltage at Pin 3 (see Note 1) Amplifier Input Voltage Output Peak Current (non repetitive, t = 2ms) Output Peak Current at f = 50 to 200 Hz, t ≤ 10µs Output Peak Current at f = 50 to 200 Hz, t > 10µs Pin 3 DC Current at V5 < V2 Pin 3 Flyback Current at f = 50 to 200 Hz, tfly ≤ 1.5ms Pin 3 Sink Current at f = 50 to 200 Hz, t ≤ 10µs Total Power Dissipation at Tcase = 90 °C Storage and Junction Temperature
Note 1:This occurs during the first part of flyback pulse
Value 35 60
VS + 3 VS - 0.5
2.5 ±5 2 100 ±1.5 5 20 -40, +150
Unit V V V V A A A mA A A W °C
2 THERMAL DATA
Symbol Rth(j-c)
Parameter Thermal Resistance Junction-case
Value 3
Unit °C/W
3 ELECTRICAL CHARACTERISTICS
(refer to the test circuits, VS = 35V, Tamb = 25°C unless otherwise specified)
Symbol
Parameter
Test Conditions
I2 Pin 2 Quiescent Current I6 Pin 6 Quiescent Current I1 Amplifier Input Bias Current
V3L Pin 3 Saturation Voltage to GND V5 Quiescent Output Voltage V5L Output Saturation Voltage to GND
I3 = 0, I5 = 0 I3 = 0, I5 = 0 V1 = 1 V, V7 = 2 V V1 = 2 V, V7 = 1 V I3 = 20 mA VS = 35V, Ra = 39 kΩ
I5 = 1.2 A I5 = 0.7 A
V5H Output Saturation Voltage to Supply
- I5 = 1.2 A - I5 = 0.7 A
Tj Junction Temperature for Thermal Shutdown
Min. Typ. Max. Unit Fig.
8 16 mA 1
16 36 mA 1
- 0.1 - 1 µA 1
- 0.1 - 1 µA 1
1 1.5 V 3
18
V4
1 1.4 V 3
0.7 1 V 3
1.6 2.2 V 2
1.3 1.8 V 2
140
°C
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Figure 1. Measurement of I1, I2, I6
Figure 2. Measurement of V5H
TDA8172
I2 2
I6
6 5
TDA8172
1
7
4
V7
+VS
10kΩ
S
a
b
I1 1V
2
6
1
TDA8172 5
1V
7
4
V7
+VS V5H
-I5
S1: (a) I2 and I6 ; (b) I1
Figure 3. Measurement of V3L, V5L
Figure 4. Measurement of V5
+VS
I3 or I5
2
6
S1 a
3b
1 TDA8172
5
7
4
V7
V3L
V5L
2
6
12kΩ
1
TDA8172
5
2V
7
V7
4
Ra
5.6kΩ
+VS V5
S: (a) V3L ; (b) V5L
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TDA8172
Figure 5. AC test circuit
1N4001
VS
C1 0.1µF
C2 470µF
D1
C3 220µF
tfly
2
63
GND t0
VREF 7
Vi
R1
1
10kΩ
RT1 4.7kΩ
TDA8172
4
V7
Ly
5
C4 0.22µF
to
Ly 24.6mH
R7 1.5Ω
R6 330Ω
Ry 9.6Ω
IN
R2 5.6kΩ
R3 12kΩ
C6 4.7µF
R4 8.2kΩ
C5 2200µF
R5Ly
*Recommended for VREF filtering
R5 8.2Ω
t0
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TDA8172
4 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 ; no electrical isolation is needed between the two surfaces since the tab is connected to Pin 4 which is ground. Figure 6. Mounting examples
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M1
D1 D E
TDA8172
5 PACKAGE MECHANICAL DATA
9 PINS - plastic heptawatt
L
L1
A
C
L2
L5
L3
M
F1 H2
F G G1 G2
H3
Dia.
L7 L6
Dimensions
A C D D1 E F F1 G G1 G2 H2 H3 L L1 L2 L3 L5 L6 L7 M M1 Dia.
Min.
2.4 1.2 0.35 0.6 2.41 4.91 7.49 10.05
2.6 15.1
6
3.65
Millimeters Typ.
2.54 5.08 7.62
16.97 14.92 21.54 22.62
2.8 5.08
Max. 4.8 1.37 2.8 1.35 0.55 0.8 0.9 2.67 5.21 7.8 10.4 10.4
3 15.8 6.6
3.85
Min.
0.094 0.047 0.014 0.024 0.095 0.193 0.295 0.396
0.102 0.594 0.236
0.144
Inches Typ.
0.100 0.200 0.300
0.668 0.587 0.848 0.891
0.110 0.200
Max. 0.189 0.054 0.110 0.053 0.022 0.031 0.035 0.105 0.205 0.307 0.409 0.409
0.118 0.622 0.260
0.152
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TDA8172
I
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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 © 2003 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES
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