PAIHAUNG PL494
The PL494 incorporates on a single monolithic chip all the functions required in the construction of a pulse-widthmodulation control circuit. Designed primarily for power supply control, this device offers the systems engineer the flexibility to tailor the power supply control circuitry to a specific application. The PL494 contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator , a pulse-steering control flip-flop, a 5-V, 5%precision regulator, and output-control circuits.| Part No. | PL494 |
|---|---|
| Datasheet | PL494 Download |
| Manufacturer | PAIHAUNG |
| Description | PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
| Buy | Stock & Price |
DESCRIPTION
PLASTIC PACKAGE DIP-16 PLASTIC PACKAGE SO-16 PIN CONNECTIONS The error amplifiers exhibit a common-mode voltage range from –0.3V to Vcc –2V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator may be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it may drive the common circuits in synchronous multiple-rail power supplies. (TOP VIEW) FUNCTION TABLE INPUT TO OUTPUT CTRL OUTPUT FUNCTION VI=GND VI=Vref Single-ended or parallel output Normal push-pull operation PL494 PAIHAUNG Product Specification PL494 Revised Date : 2007/11/20 Page No. : 2/14DESCRIPTION
(continued) The uncommitted output transistors provide either common-emitter or emitter-follower output capability. The PL494 provides for push-pull or single-ended output operation, which may be selected through the output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice during push-pull operation.
