The circuit uses the pulse width modulation mode to control the load

Published:2011/8/14 22:09:00 Author:TaoXi | Keyword: pulse width, modulation mode, load | From:SeekIC

The circuit that uses the pulse width modulation mode to control the load is as shown in the figure. The oscillation frequency of the circuit is decided by the Rl+R(RP1) and C1, f=1/[2·2(Rl+R(RP1)Cl]. The waveform duty cycle is decided by the (Rz+R(RP2)) and C2. The optocoupler TLP5llGA has the electrical isolation effect for the output and input, so the output can use the 220V AC high voltage power supply. The LED can be used to display the changes of the duty cycle.



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