Fixed-frequency Integrated Power IC with Built-in Digital Soft Start Optimized for Offline Switch-mode Power Supplies

15 September 2022 - 0 Comments

Infineon Technologies AG has introduced the new 800 V and 950 V AC-DC integrated power stages (IPS) that are housed in a DIP-7 package and address applications such as auxiliary power supplies for home appliances, AC-DC converters, battery chargers, solar energy systems, and motor control and drives. This FF CoolSET solution combines a PWM controller IC with the latest high voltage CoolMOS™ P7 superjunction (SJ) MOSFETs in a single package and enables both isolated and non-isolated topologies such as flyback or buck. Moreover, these devices operate at switching frequencies of 100 kHz and 65 kHz and minimize the number of components and design complexity.

The frequency reduction mode with soft gate driving and frequency jitter operation offers lower EMI and enhances the efficiency between mid- and light load conditions. The devices also support continuous (CCM) and discontinuous conduction mode (DCM). For low AC line input conditions, CCM operation can achieve lower conduction losses and, thus, a higher efficiency to meet international regulatory standards for energy efficiency. The integrated MOSFET supports an ultra-wide input voltage range commonly associated with single-phase smart metering and industrial applications. In addition, these devices help to optimize the snubber circuitry to further enhance the efficiency and lower the standby power consumption of the converter.

All new devices offer a high level of integration and come with a comprehensive suite of protection features with auto-restart to support the power supply system in failure situations. These protection features, together with the high breakdown voltage of the SJ MOSFET, ensure an increased power supply robustness.

Features

Integrated 800 V / 950 V avalanche rugged CoolMOS™
Enhanced Active Burst mode with selectable entry and exit standby power
Digital frequency reduction for better overall system efficiency
Fast startup achieved with cascode configuration
DCM and CCM operation with slope compensation
Frequency jitter and soft gate driving for low EMI
Built-in digital soft start
Integrated error amplifier to support direct feedback in non-isolated flyback and buck topologies
Comprehensive protection with input line overvoltage, VCC overvoltage, VCC undervoltage, overload, open loop and overtemperature
All protections are in auto restart mode
Limited charging current for VCC short to GND
Pb-free lead plating, halogen-free mold compound, RoHS-compliant