The IR2085S is a self oscillating half-bridge driver IC with 50% duty cycle ideally suited for 36V-75V half-bridge DC-bus converters. This product is also suitable for push-pull converters without restriction on input voltage. Each channel frequency is equal to fosc, where fosc can be set by selecting RT & CT, where fosc ≈ 1/(2*RT.CT). Dead-time can be controlled through proper selection of CT and can range from 50 to 200nsec. Internal soft-start increases the pulse width during power up and maintains pulse width matching for the high and low outputs throughout the start up cycle. The IR2
The IR2085S is a self-oscillating half-bridge driver integrated circuit designed for distributed systems requiring reduced component count. It features an internal oscillator, adjustable switching frequency up to 500kHz per channel, and +/- 1A drive current capability optimized for low charge MOSFETs.
The device includes programmable dead-time control ranging from 50ns to 200ns, floating channel design for bootstrap operation up to +100Vdc, and adjustable overcurrent protection. It also incorporates undervoltage lockout with internal soft-start functionality.
| Voc (max) | 25V |
|---|---|
| Package | SO-8 |
| Operating frequency (per channel) | 500 KHz |
The maximum operating frequency per channel is 500 KHz.
The adjustable dead-time ranges from 50nsec to 200nsec.