SLUA560D June   2011  – March 2022 UCC28950 , UCC28950-Q1 , UCC28951 , UCC28951-Q1

 

  1.   Trademarks
  2. 1 Design Specifications
  3. 2 Functional Schematic
  4. 3 Power Budget
  5. 4 Transformer Calculations (T1)
  6. 5 QA, QB, QC, QD FET Selection
  7. 6 Selecting LS
  8. 7 Output Inductor Selection (LOUT)
  9. 8 Output Capacitance (COUT)
  10. 9 Select FETs QE and QF
  11. 10Input Capacitance (CIN)
  12. 11Setting Up the Current Sense (CS) Network (CT, RS, RRE, DA)
  13. 12Voltage Loop and Slope Compensation
  14. 13Setting Turn-on Delays to Achieve Zero Voltage Switching (ZVS)
  15. 14Turning SR FETs-off Under Light Load Conditions
  16. 15600 W FSFB Detailed Schematic and Test Data
  17. 16References
  18. 17Revision History

1 Design Specifications

Table 1-1 Design Specifications
Description Min Typ Max
Input Voltage 370 V (VINMIN) 390 V (VIN) 410 V (VINMAX)
Output Voltage (VOUT) 11.4 V 12 V (VOUT) 50 V
Continuous Output Power (POUT) 600 W
Allowable VOUT Transient 600 mV ( VTRAN)
Full Load Efficiency 93% (η) 94%
Inductor (LOUT) Switching Frequency 200 kHz (fS)