Dear sir,
Please help us to resolve issue.
Here the design details below.
We are designed PFC for 2.4KW
- Input voltage range :150V-275VAC(50Hz)
- Output:400V@6A
- Operating frequency:100KHz
- Input UVLO:85V
- Power factor:0.99
- Peak efficiency:98%
- Operation temperature:Room Temperature 25°C(With air flow)
- Aux:12V
Design output details
- L:117uH
- Cin:1.5uF
- Cout:680uFx2
- Mosfet:STW33N60M2
- Diode:STPSC20H065CW
- Isense C:1nF
- Isense R:0.005E
- Icomp:2.2nF
- Vcomp:C2:4.7uF, C1:470nF, R1:18K
- Vsense:1nF
Schematic
Facing issues
- Initial we are faced with output voltage fluctuation at input voltage 85V, 150V, 230V. at 230V DUT was got failed(Mosfets)
- at above condition we placed 0.05E instated of 0.005E mistakenly.
- Again DUT was failed after right shunt value placed, at AC 50V(we are increasing AC voltage from 0V to 230VAC)
- we test with changing of Vcomp also but not solved.
- And We are also tested with 3.5KW reference design values but DUT was failing continuously.
Regards,
Senatla IN
