Voltage Mode PWM controller for LED Driving

[eem2am]

hello,

I have to drive leds of 24V and then 3v with the same 26V rail (from the same power supply).

So therefore, due to extremes of duty cycle, this is only practical in voltage mode.

-No off-the-shelf LED driver IC can manage this job.

But i cannot find a voltage mode PWM controller witha Duty Cycle extending to 0.95 or more.

All i can find is UCC25701
http://www.datasheetcatalog.org/datasheet/texasinstruments/ucc25701.pdf

...but this is an expensive part and i just need a basic Voltage Mode PWM controller (8 or 10 pins)

Does any reader know of such a part?

 

[frankliner]

Did you look into the part i suggested before?

**broken link removed**

 

[eem2am]

yes thankyou, but it is too expensive