Renesas offers a wide selection of PWM controllers designed for switch-mode DC/DC and AC/DC power supplies requiring an isolation transformer, such as off-line AC/DC and -48V telecom-input DC/DC converters. Included in this broad controllers and converters portfolio are single-ended and double-ended isolated PWM controllers, as well as zero voltage switching (ZVS) full bridge controllers.

Use the following table to identify which products will best meet the needs of your next isolated power project:

Topology Characteristic Flyback Forward (Two Switch) Active Clamp Forward Push-Pull Half-Bridge Full-Bridge ZVS Full Bridge (Telecom) Hard SW
Recommended Power Level <150W 120W~200W 120- 400W 100W~500W 150W~500W >400W >400W
Efficiency Least
~ 80-90%
~ 85-93%
~ 95%+
~ 95%+
~ 95%+
Recommended Devices ISL884x
ISL672x ISL6726 ISL6741 ISL674x ISL675x ISL674x
PFC Stage ISL673x
Cost Least Low Low Low Medium High High
Transfer Function = Vout/Vin (Ns/Np)*D/(1-D) (Ns/Np)*D (Ns/Np)*D 2*(Ns/Np)*D (Ns/Np)*D 2*(Ns/Np)*D 2*(Ns/Np)*D
High Input Voltage Good for bias supply Good for 2-switch forward Good Not recommended Good Good Good
Max. Duty Cycle < 100% < 50% (70% with active clamp) 70% < 50% each < 50% each < 50% each < 50% each

Family Values

  • Full family features AC/DC solution with smallest package
  • Unique output current sensing scheme
  • Unique brick wall OCP protection feature
  • Unique full bridge zero voltage switching (ZVS) control scheme
  • Optimized/Adjustable dead time control


  • AC/DC power supply
  • Brick convertor
  • Power factor correction (PFC) board
  • AC/DC Adapter


Title language Type Sort descending Format File Size Date
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
How Green is Your Cloud? White Paper PDF 295 KB
AN1387: White LED Driver Circuits for Off-Line Applications using Standard PWM Controllers Application Note PDF 746 KB
AN1262: Designing with the ISL6752, ISL6753 ZVS Full-Bridge Controllers Application Note PDF 581 KB
AN1246: Techniques To Improve ZVS Full-bridge Performance Application Note PDF 725 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1619: Designing with ISL6752DBEVAL1Z and ISL6754DBEVAL1Z Control Cards Application Note PDF 1.49 MB
AN1245: iSim ISL6742 Virtual Evaluation Platform Application Note PDF 1.05 MB
AN1002: 200W, 470kHz, Telecom Power Supply Using ISL6551 Full-Bridge Controller and ISL6550 Supervisor and Monitor Application Note PDF 4.30 MB
AN9867: End of Life Derating: A Necessity or Overkill Application Note PDF 338 KB
Intersil Commercial Lab Services Brochure PDF 364 KB