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
~70-80%
Moderate
~ 80-90%
High
85~92%
Moderate
~ 85-93%
High
~ 95%+
High
~ 95%+
High
~ 95%+
Recommended Devices ISL884x
ISL672x
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

Applications

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

文档和下载

文档标题 language 类型 文档格式 文件大小 日期
应用指南 &白皮书
Five Easy Steps to Create a Multi-Load Power Solution 白皮书 PDF 846 KB
How Green is Your Cloud? 白皮书 PDF 295 KB
AN1387: White LED Driver Circuits for Off-Line Applications using Standard PWM Controllers 应用文档 PDF 746 KB
AN1262: Designing with the ISL6752, ISL6753 ZVS Full-Bridge Controllers 应用文档 PDF 581 KB
AN1246: Techniques To Improve ZVS Full-bridge Performance 应用文档 PDF 725 KB
AN1619: Designing with ISL6752DBEVAL1Z and ISL6754DBEVAL1Z Control Cards 应用文档 PDF 1.49 MB
AN1681: Grounding Techniques 应用文档 PDF 509 KB
AN1684: Nonideality of Ground 应用文档 PDF 397 KB
AN1245: iSim ISL6742 Virtual Evaluation Platform 应用文档 PDF 1.05 MB
AN1002: 200W, 470kHz, Telecom Power Supply Using ISL6551 Full-Bridge Controller and ISL6550 Supervisor and Monitor 应用文档 PDF 4.30 MB
AN9867: End of Life Derating: A Necessity or Overkill 应用文档 PDF 338 KB
其他
Intersil Commercial Lab Services 手册 PDF 364 KB