onsemi TL494BDG

Switching Controller, Voltage-mode, 0.5A, 200kHz Switching Freq-Max, BIPolar, PDSO16

Voltage Mode PWM Controller 500mA 16-Pin SOIC Rail

PWM Controller (up to 200 kHz) TA= -40°C to +125°C

Off-Line Controllers 40kHz 200mA PWM w/48% Duty Cycle Max

VOLT MODE PWM CNTRLR 500MA 16SOIC

IC REG CTRLR BCK/PSH-PULL 16SOIC

The TL494 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control this device offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494 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. The error amplifiers exhibit a common-mode voltage range from -0.3 V to VCC -2 V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT or it can drive the common circuits in synchronous multiple-rail power supplies. The uncommitted output transistors provide either common-emitter or emitter-follower output capability. The TL494 provides for push-pull or single-ended output operation which can 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. The TL494C is characterized for operation from 0C to 70C. The TL494I is characterized for operation from -40C to 85C. The TL494B is characterized for operation from -40C to 125C. The NCV494B is characterized for -40C to 125C and certified for automotive applications.