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NTE7135 Datasheet(PDF) 3 Page - NTE Electronics

Part No. NTE7135
Description  Integrated Circuit Vertical Deflection Power Amplifier for Monitors
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Maker  NTE [NTE Electronics]
Homepage  http://www.nteinc.com
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NTE7135 Datasheet(HTML) 3 Page - NTE Electronics

   
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Functional Description (Cont’d):
Vertical Output
The vertical output stage is a quasi–complementary class–B amplifier with a high linearity. The output
contains SOAR (short–circuit protection) and thermal protection. Tne output current on Pin5 is re-
duced for a short time (to let the temperature decrease to TJ < +150°C), when the junction temperature
(TJ) exceeds +160°C.
Deflection GUARD
Pin9 will go HIGH if the junction temperature goes to high. A pulse signal with 50% duty cycle is output
on Pin9, if the deflection coil is open–circuit. A flyback pulse signal is output at normal conditions.
Further watching can be achieved by means of an external GUARD circuit. The 22
µF capacitor is
charged during flyback time (V5 > V8) at normal conditions. In case of failures, the capacitor is dis-
charged and the GUARD output goes HIGH.
GUARD output level:
D LOW for normal conditions
D HIGH for deflection coil short–circuit respectively open–circuit
D HIGH when there are neither input or output signals
VP1
VP2 (Vertical Output Stage)
Vertical Output
Differential Input Amp Input 1
VP3 (Flyback)
Pulse Circuit Output
Pin Connection Diagram
(Front View)
Substrate
Differential Input Amp Input 2
9
8
7
6
Flyback Generator Output
5
4
3
2
1


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