UTC494 - YOUWANG

UTC494 VOLTAGE MODE PWM CONTROL CIRCUITS

The UTC494 incorporate 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 device offers the systems engineer the flexibility to tailor the power supply control circuitry to its application. The UTC494 contains an error amplifier,current-limiti.

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 control Over Total Range
*Circuit architecture Allows easy Synchron - Ization
*Undervoltage Lockout ABSOLUTE MAXIMUM RATINGS (Unless otherwise noted ,all is over operating free-air temperature Range) Characteristic Symbol Supply Voltage(note 1) Vcc Amplifier Input Voltage Vi Collector Output Voltage Vo Collector Output Current Ico Continuous total dissipation at(or for below) 25 free air tempe.