Vertical Deflection Output Circuit
Overview
The LA7840 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 1.8 Ap-p, the LA7840 is suited for small and
medium screen sets.
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
Package Dimensions
unit : mm
3075-SIP7H
[LA7840]
0.6
18.0
3.4
1.38
3.0
0.6
1.2
2.54
1.0
1
7
10.8
15.0
max
13.4
1.0
min
5.8
SANYO : SIP7H
Specifications
Maximum Ratings
at Ta = 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
6 max
34
V
Output block supply voltage
V
CC
3 max
70
V
Deflection output current
I 2 max
1.5 to +1.5
Ap-o
Thermal resistance
j-c
4.0
C/W
Allowable power dissipation
Pd max
With arbitrarily large heat sink
9
W
Operating temperature
Topr
20 to +85
C
Storage temperature
Tstg
40 to +150
C
Ordering number: EN5147B
Monolithic Linear IC
LA7840
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.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
D1096HA(II)/61595HA(II) No.5147-1/4
Operating Conditions
at Ta = 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V
CC
6
24
V
Operating supply voltage range
V
CC
6 op
16 to 33
V
Recommended deflection output current
I 2 p-p
to 1.8
Ap-p
Operating Characteristics
at Ta = 25 C, V
CC
6 = 24 V
Parameter
Symbol
Conditions
min
typ
max
Unit
Pump-up charge saturation
voltage
V
S
7-1
I 7 = 20 mA
1.8
V
Pump-up discharge saturation
voltage
V
S
6-7
I 7 = 0.9 A
3.0
V
Deflection output saturation
voltage (lower)
V
S
2-1
I 2 = 0.9 A
1.3
V
Deflection output saturation
voltage (upper)
V
S
3-2
I 2 = 0.9 A
3.2
V
Idling current
I
DL
35
65
mA
Midpoint voltage
V
MID
11.0
12.0
13.0
V
Block Diagram
LA7840
No.5147-2/4
Sample Application Circuit
(Single power supply)
Sample Application Circuit
(Double power supply)
LA7840
No.5147-3/4
Sample Application Circuit
Unit (resistance:
, capacitance: F)
LA7840
PS No.5147-4/4
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co. , Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
This catalog provides information as of December, 1996. Specifications and information herein are subject to
change without notice.
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