Ic Tl494 Circuit Diagram. The tl494 device incorporates all the functions required in the construction of a pulse width modulation pwm control circuit on a single chip. Tl494 slvs074h january 1983 revised march 2017 tl494 pulse width modulation control circuits 1 1 features 1 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.
The tl494 is a fixed frequency pulse width modulation control circuit incorporating the primary building blocks required for the control of a switching power supply. The chip possesses all the needed capabilities built in for creating genuine pwms which can be customized according to the customers utility specifications. 5 v reference regulator the 5v internal reference regulator output is the ref pin which is pin 14 of the ic.
The tl494 ic has 8 functional blocks which are shown and described below.
The tl494 device incorporates all the functions required in the construction of a pulse width modulation pwm control circuit on a single chip. Tl494 is a pwm control or generation integrated circuit. The chip possesses all the needed capabilities built in for creating genuine pwms which can be customized according to the customers utility specifications. I have already posted a tutorial on sg3525 pulse width modulation controller.
