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TL494, NCV494 SWITCHMODE Pulse Width …
www.onsemi.com© Semiconductor Components Industries, LLC, 2005 June, 2005 − Rev. 6 1 Publication Order Number: TL494/D TL494, NCV494 SWITCHMODE™ Pulse Width Modulation Control Circuit The TL494 is a fixed frequency, pulse width modulation control
TL494 - Switch mode Pulse Width Modulation Control Circuit
www.onsemi.comThe TL494 is a fixed−frequency pulse width modulation control circuit, incorporating the primary building blocks required for the control of a switching power supply. (See Figure 1.) An internal−linear sawtooth oscillator is frequency− programmable by two external components, RT and CT. The approximate oscillator frequency is determined by: