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PJ494 Switchmode Pulse Width Modulation Control Circuit
he PJ494 incorporates on a single monolithic chip all the functions required in the construction of a pulsewidth-modulation control circuit. Designed primarily for power supply control, these devices offer the systems engineer the flexibility to tailor the power supply control circuitry to his application. The PJ494 contains an error amplifier, an on-chip adjustable oscillator, a deed-time control comparator, pulse-steering control flip-flop, a 5-volt, 5% precision regulator, and outputcontrol circuits. The error amplifier exhibits a common-mode voltage from –0.3 volts to Vcc –2 volts. The dead-time control comparator has a fixed offset that provides
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approximately 5% dead time when externally altered.
PJ494 Datasheet
