Problem using AL3353 boost output LED driver

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Om_sai

Joined Nov 26, 2023
8
We are using AL3353 boost output LED driver for our product design.Experiencing a problem at some times the output locks the FET and not driving the load.We tried of Varying Cs,Comp,Ovp,Fb but couldnt sort out.Can any one please give some ideas of what may causing it?
 

Irving

Joined Jan 30, 2016
3,856
Hmmm, a little more complex than a backlight driver! Seems your using the boost controller with an auxiliary L-D-C to give around 90v at 30W to drive what? What's the PWM frequency on that?

OVP is set for 96v.

Current limit at 330mA

Can't see anything immediately obvious. What's the purpose of the 3v9 and 110v zener diodes?
 
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