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NTE7135
Integrated Circuit
Vertical Deflection Power Amplifier for Monitors
Description:
The NTE7135 is a vertical power amplifier for differential input signals in a 9–Lead SIP type package
suitable for color monitor/TV systems with deflection frequencies up to 140Hz.
Features:
D Vertical Pre–Amplifier with Differential Inputs
D Powerless Vertical Shift
D Flyback Voltage Generation Suitable for Two Operating Modes (Doubling the Supply Voltage
or External Supply for the Short Flyback Time, this Achieves a Minimum of Power Dissipation)
D Vertical Output Stage with Thermal and SOAR Protection
D High Deflection Frequency up to 140Hz
D High Linear Sawtooth Signal Amplification
D Possibility of Guarding the Deflection
D Voltage Stabilizer
Absolute Maximum Ratings: (Voltages referenced to substrate (Pin6) unbless otherwise specified)
Supply Voltage (Pin1), V
Supply Voltage (Pin4), V
Supply Voltage (Pin8), V
Voltage on Pin2, Pin3, and Pin9, V2, V3, V
Voltage on Pin5 and Pin7, V5, V
Current on Pin4, I
4
P1
P2
P3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
7
Output Current on Pin5 (Peak Value, Note 1), I
Flyback Current on Pin7 (Peak Value), I
Current on Pin9, I
Junction Temperature (Note 1), T
9
VJ
Operating Ambient Temperatrure Range, T
Storage Temperature Range, T
stg
Thermal Resistance, Junction–to–Case, R
Electrostatic Handling for all Pins (Note 2), V
7 (M)
A
thJC
es
5 (M)
–20° to +75°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–25° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
40V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
60V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
60V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
60V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±1.3A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±1.3A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–8A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+168°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10K/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±300V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Internally limited by thermal protection; switching temperature point at 160 ±8°C
Note 2. Equivalent to discharging a 200pF capacitor throuhg a 0Ω series resistor.
V
P1
1A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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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) V
Supply Voltage 2 (Pin4) V
Supply Voltage 3 (Pin8) V
Supply Current (Pin1) I
Quiescent Supply Current (Pin4) I
P1
P2
P3
P1
P2
Pre–Amplifier
Input Voltage (Pin2 and Pin3) V2, V
Input Quiescent Current I2, I
Flyback Generator
Output Voltage V
Flyback Output Current
I
7 (M)
(Maximum Value, Pin7)
Threshold Voltage to Switch Flyback V
Flyback Pulse Time t
1–5
p FLB
Vertical Output
Output Voltage V
Vertical Output Current
I
5 (M)
(Maximum Value, Pin5)
9 25 30 V
9 25 60 V
9 – 60 V
– – 10 mA
Without Input Signal – 9 – mA
3
Without Input Signal – 100 – nA
3
Upper Value, I7 = –1A – VP3–2.2 – V
7
1.6 – VP1–0.5 V
– – ±1 A
ON/OFF Threshold – 1.4 – V
– 250 – µs
Upper Value, I5 = –1A VP3–2.3 VP2–2 – V
5
Lower Value, I5 = 1A – 1.5 1.7 V
– – ±1 A
Non–Linearity of Output Signal LIN – – 1 %
Pulse Circuit Output
Output Voltage V
Output Voltage for Thermal Protection Active V
Voltage to Insert Flyback Pulse on Pin9 V
Pulse Width t
1–5
p9
R
9
9
= 10kΩ 0.4 – VP1–0.4 V
PCO
VP1–0.4 – – V
Normal Condition – – 1.4 V
Deflection Open–Circuit – 50 – %
Normal Condition t
p 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 operate 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 100µF 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 voltage is twice the supply voltage.
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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 reduced for a short time (to let the temperature decrease to T
) exceeds +160°C.
(T
J
< +150°C), when the junction temperature
J
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 22µF capacitor is
charged during flyback time (V5 > V8) at normal conditions. In case of failures, the capacitor is discharged 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
Pin Connection Diagram
(Front View)
Pulse Circuit Output
9
VP3 (Flyback)
8
76Flyback Generator Output
Substrate
5
Vertical Output
4
VP2 (Vertical Output Stage)
Differential Input Amp Input 2
3
Differential Input Amp Input 1
2
1
V
P1
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.827 (21.0)
.130 (3.3) Dia
19
Seating Plane
.134
(3.42)
.590 (15.0)
.100 (2.54)
.242 (6.1)
.169
(4.3)
.118
(3.0)
Min
.065 (1.68)
.228
(5.8)
(18.5)
.140
(3.56)
.728
.250
(6.35)
.886 (22.0)
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