Fixed frequency flyback controller and CoolSET™ 5th generation

15 Feb 2018

Infineon’s latest 5^th generation fixed frequency. CoolSET™ offer high performance with the integration of the latest 700V and 800V CoolMOS™ P7 families in both DIP-7 and DSO-12 packages. To further enhance the efficiency performance, frequency reduction operation has been implemented to achieve higher efficiency with lower switching frequency at mid and light load condition. In addition, for low AC line input operation, CCM (Continuous Current Mode) operation has been implemented to achieve lower conduction losses, thereby achieving a higher efficiency to meet international regulatory standards. To further reduce BOM count and cost of a non-isolated flyback design, an integrated error amplifier is integrated to allow a direct feedback from the primary output with minimal components and complexity. 5^th generation fixed frequency CoolSET™ is targeted for SMPS applications such as auxiliary power supply for home appliances (e.g. washing machines, refrigerators and air-condition), set-top-boxes, LCD/LED monitors and general purpose power supply.

Features

• Integrated with 700V and 800V superjunction MOSFETs with avalanche capability
• Comprehensive suite of protection
• Fixed frequency switching scheme with eco mode
• Support both DCM and CCM current control mode
• Direct feedback with integrated error amplifier for non-isolated topologies

Benefits

• High efficiency with latest CoolMOS™ P7 SJ MOSFET family and fixed frequency switching scheme
• Extensive protection coverage to increase system robustness
• Auto-restart recovery scheme to minimize interruption to system operation
• Single platform to support both isolated and non-isolated topologies

Target applications

• Auxiliary power supply
• Set-top-boxes
• LCD/LED monitors
• General purpose power supply

Competitive Advantage

• Highest power delivery in the industry of up to 43 W with 800V CoolSET™
• Selectable active burst mode entry/exit profile with the ability to disable to avoid acoustic noise
• Integrated error amplifier to support direct feedback for non-isolated flyback design