The 3524/25's are stripped down versions of the 3526 - all are voltage controlled PWM's.
You set up a reference voltage and then compare it to/with the output voltage you create/integrate with the output side. The error amp keeps the output voltage constant by varying duty cycle - frequency stays fixed. You can daisy chain most of them and even do pulse by pulse current limiting and/or even soft starts.
I recall the 24/25 as being simple O/C outputs while the 26 is dual totem pole version. You can AND/OR the outputs as appropriate. |