I need support about the choice of the right controller for a high power (2kW) step-down converter with adjustable output voltage. The application is DC Variac (chopper).
- Topology is: non-synchronous buck
- The goal is to control the output power
- Inductor current and output voltage are available as feedback
- Power loop is performed by a microprocessor (based on I and V feedback)
- The microprocessor gives a set to the controller
- V and I feedback can also be used to close loops on the controller
- Current limiting function is needed (cycle by cycle)
I was thinking about using a UC3843 (current mode) or a UC35705 (voltage mode with current limiting).
What do you think about ? Any recommendations ? Or any other suggestions ?
Can anyone show me a draft of schematics ?
Thank you
Thank you
- Topology is: non-synchronous buck
- The goal is to control the output power
- Inductor current and output voltage are available as feedback
- Power loop is performed by a microprocessor (based on I and V feedback)
- The microprocessor gives a set to the controller
- V and I feedback can also be used to close loops on the controller
- Current limiting function is needed (cycle by cycle)
I was thinking about using a UC3843 (current mode) or a UC35705 (voltage mode with current limiting).
What do you think about ? Any recommendations ? Or any other suggestions ?
Can anyone show me a draft of schematics ?
Thank you
Thank you