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NTE7135 Datasheet(PDF) 2 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) 2 Page - NTE Electronics

   
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Electrical Characteristics: (VP1 = VP2 = 25V, VN = V6 = 0V, TA = +25°C, voltages referenced to
substrate (Pin6) unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Voltage 1 (Pin1)
VP1
9
25
30
V
Supply Voltage 2 (Pin4)
VP2
9
25
60
V
Supply Voltage 3 (Pin8)
VP3
9
60
V
Supply Current (Pin1)
IP1
10
mA
Quiescent Supply Current (Pin4)
IP2
Without Input Signal
9
mA
Pre–Amplifier
Input Voltage (Pin2 and Pin3)
V2, V3
1.6
VP1–0.5
V
Input Quiescent Current
I2, I3
Without Input Signal
100
nA
Flyback Generator
Output Voltage
V7
Upper Value, I7 = –1A
VP3–2.2
V
Flyback Output Current
(Maximum Value, Pin7)
I7 (M)
±1
A
Threshold Voltage to Switch Flyback
V1–5
ON/OFF Threshold
1.4
V
Flyback Pulse Time
tp FLB
250
µs
Vertical Output
Output Voltage
V5
Upper Value, I5 = –1A
VP3–2.3
VP2–2
V
Lower Value, I5 = 1A
1.5
1.7
V
Vertical Output Current
(Maximum Value, Pin5)
I5 (M)
±1
A
Non–Linearity of Output Signal
LIN
1
%
Pulse Circuit Output
Output Voltage
V9
RPCO = 10kΩ
0.4
VP1–0.4
V
Output Voltage for Thermal Protection Active
V9
VP1–0.4
V
Voltage to Insert Flyback Pulse on Pin9
V1–5
Normal Condition
1.4
V
Pulse Width
tp9
Deflection Open–Circuit
50
%
Normal Condition
tp FLB
µs
Functional Description:
Differential Input Amplifier
The differential sawtooth input signal (coming from a ramp output of the NTE7132 for example) is fed
to the input pins 2 and 3. The non–inverted signal is attached to Pin3. The vertical feedback signal
is superimposed on the inverted input signal on Pin2.
Vertical shift is applied at the inputs in a power–less way.
Flyback Generator
Signals for the flyback generator and the pulse circuit are generated in the flyback driver stage. The
flyback output consists of a Darlington transistor and a flyback diode. The flyback generator can oper-
ate in two modes:
1. An external supply voltage is applied for the short flyback time, thus power dissipation is minimum.
2. The flyback voltage is generated by doubling the supply voltage. The 100
µF capacitor C2 between
Pin4 and Pin7 is charged up to VP1 during scan, using the external diode and the resistor R2. The
cathode of the capacitor C2 is connected to the positive rail during flyback. Thus, the flyback volt-
age is twice the supply voltage.


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