In the datasheet for the MP4033 there is a parameter called PWM Dimming Blanking Time and it is specified as 20msec typical. What does it mean? I don’t see it explained anywhere in the datasheet.
Hello @gfuchs,
The PWM Dimming Blanking time can be referred as standard blanking time where both the high side and low side MOSFETS are turned off for a certain time when analog dimming operation is desired. Since, the output current varies linearly with the duty cycle of the PWM, it is crucial to have blanking period in order to avoid short through or unpredicted spikes at the output current.
Best,
Saquib
What high side and low side fets are you referring to? This is a flyback converter there is only one fet. Can you provide a timing diagram that explains what this parameter is?