does anybody know a buck (buck/boost) controller chip capable for very low speed (like 2kHz to 30 kHz)? I know that is totally not state of the art but power IGBT are slooow. I find millions of 500kHz, MHz chips and think I need the expertise of someone knowing the market. Sync operation or capability for multiphases might be nice. If the controller shortens pulses - there are minimum switch on/switch off times. So a hysteretic controller might be problematic?
Any advice is much appreciated.