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 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.
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
Package Dimensions
unit: mm
3248-SIP10H-D
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[LA7875N] |
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25.6 |
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2.0 |
2.4 |
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C0.7 |
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3.4 |
(10.0) |
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13.9 |
11.2 |
(11.8) |
15.4max |
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1 |
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10 |
1.0min |
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4.5 |
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1.37 |
2.54 |
0.5 |
1.15 |
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0.4 |
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1.2 |
SANYO: SIP10H-D
unit: mm
3024A-SIP10H |
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[LA7876N] |
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27.0 |
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4.0 |
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20.0 |
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R1.7 |
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8.4 |
7.0 |
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11.8 |
13.2max |
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1.0 min |
6.0 |
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1 |
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10 |
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1.4 |
0.5 |
2.54 |
2.07 |
0.4 |
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2.0 |
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SANYO: SIP10H |
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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
LA7875N, 7876N
Specifications
Maximum Ratings at Ta = 25°C
Parameter |
Symbol |
Conditions |
Ratings |
Unit |
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First pump-up supply voltage |
VCC7max |
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35 |
V |
Second pump-up supply voltage |
VCC9max |
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72 |
V |
Output block supply voltage |
VCC4max |
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110 |
V |
Allowable power dissipation |
Pdmax |
With an arbitrarily large heat sink |
12 |
W |
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Deflection output current |
I3max |
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–1.5 to +1.5 |
Ap-o |
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(–1.9 to +1.9) |
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Thermal resistance |
θ j-c |
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4 (3) |
°C/W |
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Operating temperature |
Topr |
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–20 to +85 |
°C |
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Storage temperature |
Tstg |
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–40 to +150 |
°C |
Note: Values in parentheses apply to the LA7876N.
Operating Conditions at Ta = 25°C
Parameter |
Symbol |
Conditions |
Ratings |
Unit |
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Recommended supply voltage |
VCC7 |
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30 |
V |
Operating supply voltage range |
VCC7op |
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16 to 33 |
V |
Recommended deflection output current |
I3p-p |
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Up to 2.2 |
Ap-p |
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(Up to 3) |
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Note: Values in parentheses apply to the LA7876N.
Operating Characteristics at Ta = 25°C, VCC8 = 30 V
Parameter |
Symbol |
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Conditions |
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Ratings |
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Unit |
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min |
typ |
max |
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Pump-up circuit 1 charge saturation voltage |
V(sat) 8-2 |
I8 |
= 20 mA |
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1.8 |
V |
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Pump-up circuit 1 discharge saturation voltage |
V(sat) 7-8 |
I8 |
= –1.1A (–1.5 A) |
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3.2 |
V |
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Pump-up circuit 2 charge saturation voltage |
V(sat) 10-2 |
I10 = 20 mA |
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1.8 |
V |
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Pump-up circuit 2 discharge saturation voltage |
V(sat) 9-10 |
I10 = –1.1A (–1.5 A) |
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3.2 |
V |
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Deflection output saturation voltage (lower) |
V(sat) 3-2 |
I3 |
= 1.1A (1.5 A) |
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1.5 (1.7) |
V |
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Deflection output saturation voltage (upper) |
V(sat) 4-3 |
I3 |
= –1.1A (–1.5 A) |
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3.5 (3.9) |
V |
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Idling current |
IDL |
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35 |
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70 |
mA |
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Midpoint voltage |
VMID |
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14 |
15 |
16 |
V |
Note: Values in parentheses apply to the LA7876N.
No. 6232-2/4
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