IR21531SPBF

Preliminary Data Sheet No. PD60131-L IR21531D(S) & (PbF) SELF-OSCILLATING HALF-BRIDGE DRIVER Features Integrated 600V half-bridge gate driver 15.6V zener clamp on Vcc True micropower start up Tighter initial deadtime control Low temperature coefficient deadtime Shutdown feature (1/6th Vcc) on CT pin Increased undervoltage lockout Hysteresis (1V) Lower power level-shifting circuit Constant LO, HO pulse widths at startup Lower di/dt gate driver for better noise immunity Low side output in phase with RT Internal 50nsec (typ.) bootstrap diode (IR21531D) Excellent latch immunity on all inputs and outputs ESD protection on all leads Also available LEAD_FREE Product Summary VOFFSET Duty Cycle Tr/Tp Vclamp Deadtime (typ.) 600V max. 50% 80/40ns 15.6V 0.6 µs Packages Description 8 Lead PDIP 8 Lead SOIC The IR21531(D)(S) are an improved version of the popular IR2155 and IR2151 gate driver ICs, and incorporates a high voltage half-bridge gate driver with a front end oscillator similar to the industry standard CMOS 555 timer. The IR21531 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. Noise immunity h...