SANYO LA7832 Datasheet

Ordering number: EN 5145

Monolithic Linear IC

LA7832

Color TV Vertical Deflection Output Circuit

Overview

The LA7832 is a monolithic linear IC for vertical deflection
output for small and mid-sized color television sets that
requires few external components and dissipates little power.
When used in conjunction with the LA7620 series of video
chroma deflection ICs, the LA7800 series of deflection ICs,
and the LA7850 series of display ICs, it is possible to create a
stable and compact vertical output deflection circuit.

Package Dimensions

unit : mm

3075-SIP7H

[LA7832]

Features

.

High output.

.

Low power dissipation due to built-in pump-up circuit.

.

Few external components needed.

.

Thermal protection circuit built in.

SANYO : SIP7H

Specifications

Maximum Ratings atTa=25°C

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

Deflection output current I
Allowable power dissipation Pd max With arbitrarily large heat sink 8 W
Operating temperature Topr –20 to +85
Storage temperature Tstg –40 to +150
Thermal resistance θj-c 4

max (Pump-up block) 30 V

6

V

max (Output block) 62 V

3

max ±1.5 Ap-o

2

C/W

°

C

°

C

°

Operating Conditions atTa=25°C

Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Operating supply voltage range V
Deflection output current I

6
6

p-p to 1.8 Ap-p

2

10 to 27 V

Operating Characteristics atTa=25°C, V6=24V

Parameter Symbol Conditions min typ max Unit
Deflection output saturation voltage (lower) V
Deflection output saturation voltage (upper) V
Pump-up charge saturation voltage V
Pump-up discharge saturation voltage V
Idling current I
Midpoint voltage V

(sat)2-1I2
(sat)3-2I2
(sat)7-1I7
(sat)6-7I7

DL
MID

= +0.9 A 1.2 V
= –0.9 A 3.2 V
= +20 mA 1.8 V
= –0.9 A 3.0 V

30 60 mA

9.5 10.5 11.5 V

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52995HA(II) No.5145-1/3

24 V

LA7832

Pin Assignment and Functional Block Diagram

Vertical driver

Vertical

Thermal

protector

output

Pump-up

GND

Vertical

output pin

power supply

Vertical output

Input pin

Oscillation

stopping pin

)

6

Power supply

(V

output

Pulse amplifier

Sample Application Circuit Sample Application Circuit

LA7820 vertical output LA7620 vertical output

R1* = several hundreds of ohms to 1 kΩ
*: CR used against oscillation

The combination depends on the oscillation
mode.

Sample Application Circuit

LA7850 vertical output

With arbitrarily large heat sink

50 x 50 x 1.5 mm

Pd max — W

30 x 30 x 1.5 mm3with Al heat sink

No heat sink

Allowable power dissipation

Pd max — Ta

Tightening torque: 4 kg/cm

Coated with silicone grease

3

with Al heat sink

Ambient temperature, Ta —°C

No.5145-2/3