Infineon – 5th generation PWM controller – Fixed frequency flyback controller and CoolSET™
Rapid start-up with cascode configuration
To achieve a fast start-up performance, the 5th generation controller utilizes a high voltage superjunction MOSFET together with an internal current regulator to operate the start-up sequence in a safe and rapid manner. This is commonly known as cascode configuration.
With integration of the latest 800 V CoolMOSTM P7 power MOSFET and the optimization of leading edge blanking time, high AC line input of up to 350 VAC is supported.
With integration of the latest 800 V CoolMOSTM P7 power MOSFET and the optimization of leading edge blanking time, high AC line input of up to 350 VAC is supported.
Eco mode with frequency reduction scheme
To increase the overall efficiency of the converter, the 5th generation controller enters the eco mode, whereby the switching frequency will be reduced in tandem with a reduction in load condition. This allows the system to reduce switching losses and increase efficiency especially at mid and light load conditions.
Integration of error amplifier for BOM savings and ease-of-design
In a multi-output or a single non-isolated output flyback design, the output regulation can be easily implemented on the primary side via a direct feedback with the 5th generation fixed frequency series. Such an approach helps to reduce external discrete components as well as simplifying the design of the power supply.
Comprehensive suite of protection features
In addition to the typical output protection such as output short, overload and overvoltage protection, the 5th generation controller is incorporating additional protection to detect abnormal line input condition such as over-voltage protection. Similarly, in-system protection has been further enhanced with the introduction of VCC and CS pin short to ground to prevent controller damage during abnormal start-up conditions and OTP has been enhanced with hysteresis to improve operational fault handling. To minimize interruption to system operation, all protection modes are implemented with auto resume to enhance user experience.
Key Features
- Integrated with 700 V and 800 V 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
Key benefits
- High efficiency with latest CoolMOSTM P7 power 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
Link to the Infineon product site
Intern: ICPWM
