IKSemicon TL494 Pulse-Width-Modulation Controller IC

The IL494 incorporates on a single monolithic chip all the functions required in the construction of a pulse-width-modulation control circuit. Designed primarily for power supply control, the IL494 contains an on-chip 5-volt regulator, two error amplifiers,
an adjustable oscillator, a dead-time control comparator, a pulse-steering flip-flop, and output-control circuitry. The uncommitted output transistors provide either common-emitter or emitter-follower output capability. Push-pull or single-ended output operation may be selected through the output-control function. The architecture of the IL494 prohibits the possibility of either output being pulsed twice during push-pull operation.

 Features

• Complete PWM Power-Control Circuitry
• Uncommitted Outputs for 200-mA Sink or Source Current
• Output Control Selects Single-Ended or Push-Pull Operation
• Internal Circuitry Prohibits Double Pulse at Either Output
• Variable Dead Time Provides Control Over Total Range
• Internal Regulator Provides a Stable 5-V

Applications

• Desktop PCs
• Microwave Ovens
• Power Supplies: AC/DC, Isolated, With PFC, > 90 W
• Server PSUs
• Solar Micro-Inverters
• Washing Machines: Low-End and High-End E-Bikes
• Power Supplies: AC/DC, Isolated, No PFC, < 90 W

Datasheet

Specifications