Three-phase gate driver absorbs extra functions to cut size, cost and time to market

International Rectifier has included a ground-referenced operational amplifier in its IRS233x monolithic three-phase gate-driver ICs, which brings analogue feedback of bridge current onto the chip to simplify design, reduce footprint and save parts count.

In addition to the integrated op-amp, the Pumps, fans, HVAC systems IRS233x also feature an on-chip bootstrap diode for further board-space and component savings. There is also comprehensive on-chip protection, including proprietary negative voltage-spike immunity for safe operation under extreme switching conditions and short-circuit events. Over-current detection, Under- Voltage Lock-Out (UVLO), integrated dead-time protection, shoot-through protection and fault reporting are also provided. Complementing these protection features, IR’s advanced high-voltage IC process provides inherent electrical over-stress protection and high field reliability.

The output buffer stage supports large pulse currents and is optimised for minimum driver cross-conduction. Matched propagation delays simplify use at high frequencies. The floating channel can be used to drive an N-channel power MOSFET or IGBT in the high-side configuration.

 

FEATURES Referenced output channels 200mA/420mA drive current 20V gate-drive capability 600V operation Compatible with 3.3V input logic

APPLICATIONS Low-, mid- and high-voltage motor drives Micro, mini and general-purpose inverter drives Permanent Magnet (PM) motor drives for: Domestic appliances In addition to the integrated op-amp, the Pumps, fans, HVAC systems

 

 

 

 

• Avago Technologies’ ACPL-C78x, page 081015
• austriamicrosystems’ AS5134, page 081016

 

International Rectifier / IRS233x