NTE7136 Ver la hoja de datos (PDF) - NTE Electronics

Número de pieza

componentes Descripción

Fabricante

NTE7136

Integrated Circuit Vertical Deflection Power Amplifier for Monitors

NTE Electronics 

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)

Supply Voltage 2 (Pin4)

Supply Voltage 3 (Pin8)

Supply Current (Pin1)

Quiescent Supply Current (Pin4)

Pre–Amplifier

VP1

9

25

30

V

VP2

9

25

60

V

VP3

9

–

60

V

IP1

–

–

10

mA

IP2 Without Input Signal

–

9

–

mA

Input Voltage (Pin2 and Pin3)

Input Quiescent Current

Flyback Generator

V2, V3

I2, I3 Without Input Signal

1.6

– VP1–0.5 V

–

100

–

nA

Output Voltage

Flyback Output Current

(Maximum Value, Pin7)

V7

I7 (M)

Upper Value, I7 = –1A

– VP3–2.2 –

V

–

–

±1.3

A

Threshold Voltage to Switch Flyback

Flyback Pulse Time

Vertical Output

V1–5

tp FLB

ON/OFF Threshold

–

1.4

–

V

–

250

–

µs

Output Voltage

Vertical Output Current

(Peak–to–Peak Value, Pin5)

V5 Upper Value, I5 = –1A VP2–2.3 VP2–2

–

V

Lower Value, I5 = 1A

–

1.5

1.7

V

Upper Value, I5 = –1.4A

– VP2–2.3 –

V

Lower Value, I5 = 1.4A

–

1.7

–

V

I5 (P–P)

–

–

2.8

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 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 volt-

age is twice the supply voltage.

Share Link: