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 characteristicsSpecifications Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC7 max ...
LA7875N: 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 characteristicsSpe...
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Parameter | Symbol | Conditions | Ratings | Unit |
Maximum supply voltage | VCC7 max | 35 | V | |
Second pump-up supply voltage | VCC9max | 72 | V | |
Output block supply voltage | VCC4 max | 440 | V | |
Allowable power dissipation | Pd max | With arbitrarily large heat sink | 12 | W |
Deflection output current | I3max | 1.5 to +1.5 (1.9 to +1.9) |
Ap-o | |
Thermal resistance | j-c | 4 (3) | °C/W | |
Operating temperature | Topr | 20 to +85 | °C | |
Storage temperature | Tstg | 40 to +150 | °C |
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.