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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 3x pump-up technique in the voltage pump-up circuit. Since this allows the use of a reference voltage lower than that used with the 2x pump-up technique, the LA7875N, LA7876N achieve a significant reduction in power dissipation. Also, since the bus control system signalprocessing 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
* * * * * 3x 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 = 25C
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 VCC7max VCC9max VCC4max 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
j-c
Topr Tstg
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operating supply voltage range Recommended deflection output current Note: Values in parentheses apply to the LA7876N. Symbol VCC7 VCC7op I3p-p Conditions Ratings 30 16 to 33 Up to 2.2 (Up to 3) Unit V V Ap-p
Operating Characteristics at Ta = 25C, VCC8 = 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 VMID 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

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