IR2085S

The IR2085S from Infineon Technologies is a high-speed, self-oscillating half-bridge driver IC with a 50% duty cycle. It is designed for half-bridge DC-bus converters, particularly for 48V distributed systems, offering a simplified primary side control solution. This IC integrates an oscillator and a half-bridge driver into a single SO-8 package, reducing component count and board space.

Key electrical specifications include a maximum switching frequency of 500kHz, +/- 1A drive current capability optimized for low charge MOSFETs, and adjustable dead-time ranging from 50ns to 200ns. The floating channel is designed for bootstrap operation up to 100Vdc, with high and low side pulse width matching to +/- 25ns. It also features adjustable overcurrent protection, undervoltage lockout, and internal soft start.

The IR2085S is suitable for 36V to 75V half-bridge DC-bus converters and can also be used in push-pull converters. It operates with a supply voltage range of 10V to 15V and has an operating temperature range of -40°C to 150°C (TJ). The device is available in an 8-SOIC package, suitable for surface mounting.

This component is ideal for applications requiring efficient power conversion in a compact form factor. Its integrated features simplify design and enhance performance in power supply and DC-DC conversion systems.