Ordering number : EN6232
Monolithic Linear IC
LA7875N, 7876N
Vertical Deflection Output Circuit
Overview
The LA7875N, LA7876N are designed for use in internet
TVs and high-resolution CRT monitors that require a
narrow vertical return period. These ICs succeed in
achieving a narrow vertical return period by adopting a
new 3× pump-up technique in the voltage pump-up circuit.
Since this allows the use of a reference voltage lower than
that used with the 2× pump-up technique, the LA7875N,
LA7876N achieve a significant reduction in power
dissipation. Also, since the bus control system signal-
processing IC can control these ICs and these ICs can
directly drive the deflection yoke for all frequencies down
to DC from the sawtooth wave output, shift operation,
which is required for wide aspect ratio television, can be
controlled from the bus. Since the LA7875N has a
maximum deflection output current of 2.2 A p-p, it is
appropriate for use in medium-size CRTs. Since the
LA7876N has a maximum deflection output current of 3 A
p-p, it is appropriate for use in larger CRTs.
Package Dimensions
unit: mm
3248-SIP10H-D
[LA7875N]
25.6
C0.7
3.4
(10.0)
2.0
2.4
1.0min
1
1.37
2.54
0.5
1.15
10
4.5
13.9
11.2
(11.8)
15.4max
0.4
1.2
SANYO: SIP10H-D
unit: mm
3024A-SIP10H
[LA7876N]
27.0
20.0
R1.7
4.0
Features
•
•
•
•
•
3× voltage pump-up circuit
Low power dissipation
Operational amplifier type vertical output circuit
Capable of direct DC drive of the deflection yoke
Excellent crossover characteristics
7.0
1
1.4
0.5
2.54
10
2.07
0.4
2.0
SANYO: SIP10H
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
62599TH(OT) No. 6232-1/4
1.0 min
6.0
11.8
13.2max
8.4
LA7875N, 7876N
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
First pump-up supply voltage
Second pump-up supply voltage
Output block supply voltage
Allowable power dissipation
Deflection output current
Thermal resistance
Operating temperature
Storage temperature
Note: Values in parentheses apply to the LA7876N.
Symbol
V
CC
7max
V
CC
9max
V
CC
4max
Pdmax
I3max
With an arbitrarily large heat sink
Conditions
Ratings
35
72
110
12
–1.5 to +1.5
(–1.9 to +1.9)
4 (3)
–20 to +85
–40 to +150
Unit
V
V
V
W
Ap-o
°C/W
°C
°C
θ
j-c
Topr
Tstg
Operating Conditions
at Ta = 25°C
Parameter
Recommended supply voltage
Operating supply voltage range
Recommended deflection output current
Note: Values in parentheses apply to the LA7876N.
Symbol
V
CC
7
V
CC
7op
I3p-p
Conditions
Ratings
30
16 to 33
Up to 2.2
(Up to 3)
Unit
V
V
Ap-p
Operating Characteristics
at Ta = 25°C, V
CC
8 = 30 V
Parameter
Pump-up circuit 1 charge saturation voltage
Pump-up circuit 1 discharge saturation voltage
Pump-up circuit 2 charge saturation voltage
Pump-up circuit 2 discharge saturation voltage
Deflection output saturation voltage (lower)
Deflection output saturation voltage (upper)
Idling current
Midpoint voltage
Note: Values in parentheses apply to the LA7876N.
Symbol
V(sat) 8-2
V(sat) 7-8
I8 = 20 mA
I8 = –1.1A (–1.5 A)
Conditions
Ratings
min
typ
max
1.8
3.2
1.8
3.2
1.5 (1.7)
3.5 (3.9)
35
14
15
70
16
Unit
V
V
V
V
V
V
mA
V
V(sat) 10-2 I10 = 20 mA
V(sat) 9-10 I10 = –1.1A (–1.5 A)
V(sat) 3-2
V(sat) 4-3
IDL
V
MID
I3 = 1.1A (1.5 A)
I3 = –1.1A (–1.5 A)
No. 6232-2/4
LA7875N, 7876N
Pin Assignment and Block Diagram
Pump
up 1
Pump
up 2
Sample Application Circuit (using both positive and negative power supply voltages)
Pump
up 1
Pump
up 2
No. 6232-3/4
LA7875N, 7876N
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 June, 1999. Specifications and information herein are subject to
change without notice.
PS No. 6232-4/4
Analog electronics
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