Product Summary

The IR21531S is a self-oscillating half-bridge driver. The IR21531S provides more functionality and is easier to use than previous ICs. A shutdown feature has been designed into the CT pin, so that both gate driver outputs can be disabled using a low voltage control signal. In addition, the gate driver output pulse widths are the same once the rising undervoltage lockout threshold on VCC has been reached, resulting in a more stable profile of frequency vs time at startup.

Parametrics

IR21531S absolute maximum ratings: (1)High side floating supply voltage: -0.3 to 625V; (2)VS High side floating supply offset voltage: VB - 25 to VB + 0.3V; (3)VHO High side floating output voltage: VS - 0.3 to VB + 0.3V; (4)VLO Low side output voltage: -0.3 to VCC + 0.3V; (5)VRT RT pin voltage: -0.3 to VCC + 0.3V; (6)VCT CT pin voltage: -0.3 to VCC + 0.3V; (7)Junction temperature: -55 to 150°C; (8)TS Storage temperature: -55 to 150°C.

Features

IR21531S features: (1)Integrated 600V half-bridge gate driver; (2)15.6V zener clamp on Vcc; (3)True micropower start up; (4)Tighter initial deadtime control; (5)Low temperature coefficient deadtime; (6)Shutdown feature (1/6th Vcc)on CT pin; (7)Increased undervoltage lockout Hysteresis (1V); (8)Lower power level-shifting circuit; (9)Constant LO, HO pulse widths at startup; (10)Lower di/dt gate driver for better noise immunity; (11)Low side output in phase with RT; (12)Internal 50nsec (typ.)bootstrap diode (IR21531D); (13)Excellent latch immunity on all inputs and outputs; (14)ESD protection on all leads; (15)Also available LEAD_FREE.

Diagrams

IR21531S package dimensions

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
IR21531S
IR21531S


IC DRVR HALF BRDG SELF-OSC 8SOIC

Data Sheet

Negotiable 
IR21531SPbF
IR21531SPbF

International Rectifier

Power Driver ICs

Data Sheet

0-1700: $0.59
1700-2500: $0.56
IR21531STRPBF
IR21531STRPBF

International Rectifier

Power Driver ICs

Data Sheet

0-1360: $0.73
1360-2500: $0.62
2500-5000: $0.57
IR21531STR
IR21531STR


IC DRVR HALF BRDG SELF-OSC 8SOIC

Data Sheet

Negotiable