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Overview
The LA7845 is a vertical deflection output IC for highresolution television and CRT display systems that use a
bus controller system signal processing IC. It can directly
drive the deflection yoke (including the required DC
component) from the bus controller system signal
processing IC's sawtooth waveform output. Connecting
the LA7845 and a Sanyo TV bus control system signal
processing IC in the LA7615 series allows all functions of
a color television signal system to be processed by the bus
system. Since the LA7845 has a maximum deflection
current of 2.2 Ap-p, it is optimal for use in large aperture
products, and is capable of driving 33 to 37 inch class
monitors.
Features
• Low power dissipation due to the provision of a built-in
pump circuit
• Vertical output circuit
• On-chip thermal protection circuit
• Good crossover characteristics
• Supports DC coupling
Package Dimensions
unit: mm
3075-SIP7H
Ordering number : EN4713
93098HA (OT) / 51094TH (OT) B8-0786 No. 4713-1/4
LA7845
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Vertical Deflection Output Circuit
CMOS LSI
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.
Specifications
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
CC
6 max 40 V
Output block supply voltage V
CC
3 max 85 V
Deflection output current I2 max –1.5 to +1.5 Ap-o
Thermal resistance
θj-c 4.0 °C/W
Allowable power dissipation Pd max With an arbitrarily large heat sink 11 W
Operating temperature Topr –20 to +85 °C
Storage temperature Tstg –40 to +150 °C
[LA7845]
SANYO: SIP7H
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Operating Characteristics at Ta = 25°C, VCC6 = 24 V
Block Diagram
No. 4713-2/4
LA7845
Parameter Symbol Conditions
Ratings
Unit
min typ max
Pump circuit charge saturation voltage V
S
7-1 I7 = 20 mA 1.8 V
Pump circuit discharge
V
S
6-7 I7 = –1.1 A 3.2 V
saturation voltage
Deflection output saturation voltage
V
S
2-1 I2 = 1.1 A 1.5 V
(lower)
Deflection output saturation voltage
V
S
3-2 I2 = –1.1. A 3.5 V
(upper)
Idling current I
DL
35 70 mA
Midpoint voltage V
MID
11.0 12.0 13.0 V
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
CC
6 24 V
Operating supply voltage range V
CC
6 op 10 to 38 V
Recommended deflection output current I2 p-p up to 2.2 Ap-p
Operating Conditions at Ta = 25°C
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No. 4713-3/4
LA7845
Sample Application Circuit (Dual power supply)
Sample Application Circuit (Single power supply)
Page 4
PS No. 4713-4/4
LA7845
This catalog provides information as of August, 1998. Specifications and information herein are subject to
change without notice.
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.
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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.
Unit (resistance: Ω, capacitance: F)
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