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TL494

Fairchild Semiconductor
Part Number TL494
Manufacturer Fairchild Semiconductor
Description SMPS Controller
Published Apr 16, 2005
Detailed Description www.fairchildsemi.com TL494 SMPS Controller Features • Internal regulator provides a stable 5V reference supply trimme...
Datasheet PDF File TL494 PDF File

TL494
TL494

Overview
www.
fairchildsemi.
com TL494 SMPS Controller Features • Internal regulator provides a stable 5V reference supply trimmed to 5% • Uncommitted output TR for 200mA sink or source current • Output control for push-pull or single-ended operation • Variable duty cycle by dead time control (pin 4) Complete PWM control circuit • On-chip oscillator with master or slave operation • Internal circuit prohibits double pulse at either output Description The TL494 is used for the control circuit of the PWM switching regulator.
The TL494 consists of 5V reference voltage circuit, two error amplifiers, flip flop, an output control circuit, a PWM comparator, a dead time comparator and an oscillator.
This device can be operated in the switching frequency of 1 KHz to 300 KHz.
16-DIP 1 16-SOP 1 Internal Block Diagram Rev.
5.
0 ©2000 Fairchild Semiconductor International TL494 Absolute Maximum Ratings Parameter Supply Voltage Collector Supply Voltage Output Current Amplifier Input Voltage Power Dissi...


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