SANYO LA7846N Service Manual

Ordering number: EN5149B

Monolithic Linear IC

LA7846N

Vertical Deflection Output Circuit

Overview

The LA7846N is a vertical deflection output IC for TVs and
CRT displays with excellent image quality that use a BUS
control system signal processing IC. This IC can drive the
direct (even including a DC component) deflection yoke with
the sawtooth wave output from the BUS control system signal
processing IC. When used in conjunction with Sanyo’s LA7615
series of BUS control system signal processing ICs for TVs,
this IC can process all color television signal system functions
through the BUS system. Because the maximum deflection
current is 3.0 Ap-p, the LA7846N is suited for large screen
sets, being capable of driving screens ranging from 33 inches
to 37 inches.

Features

.

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

.

Vertical output circuit

.

Thermal protection circuit built in

.

Excellent crossover characteristics

.

DC coupling possible

Specifications

Package Dimensions

unit : mm

3024A-SIP10H

[LA7846N]

27.0

20.0

8.4

7.0

1.4

2.54

0.5

4.0

R1.7

11.8

13.2max

6.0

1.0min

101

SANYO : SIP10H

2.07

0.4

2.0

Maximum Ratings atTa=25°C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Output block supply voltage V
Deflection output current I 3 max –1.9 to +1.9 Ap-o
Thermal resistance θj-c 3.0
Allowable power dissipation Pd max With arbitrarily large heat sink fins 20 W
Operating temperature Topr –20 to +85
Storage temperature Tstg –40 to +150

Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.

7 max 40 V

CC

4 max 85 V

CC

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

D1096HA(II)/N3095HA(II)/61595HA(II) No.5149-1/4

C/W

°

°
°

C
C

LA7846N

Operating Conditions atTa=25°C

Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Operating supply voltage range V
Recommended deflection output current I 3 p-p to 3.0 Ap-p

Operating Characteristics atTa=25°C, VCC7=24V

Parameter Symbol Conditions min typ max Unit

Pump-up charge saturation
voltage

Pump-up discharge saturation
voltage

Deflection output saturation
voltage (lower)

Deflection output saturation
voltage (upper)

Idling current I
Midpoint voltage V

V

8-2 I8=20mA 1.8 V

S

V

7-8 I 8 = –1.5 A 3.7 V

S

V

3-2 I 3 = 1.5 A 1.7 V

S

V

4-3 I 3 = –1.5 A 3.9 V

S

DL
MID

Block Diagram

724V

CC

7op 16to38 V

CC

35 70 mA

11.0 12.0 13.0 V

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