IR2154

Preliminary Data Sheet No. PD60063I IR2154 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 High side output in phase with RT Excellent latch immunity on all inputs and outputs ESD protection on all leads Product Summary VOFFSET Duty Cycle Tr/Tp Vclamp Deadtime (typ.) 600V max. 50% 80/40ns 15.6V 1.2 µs Packages Description The IR2154 is an improved version of the popular IR2152 gate driver IC, and incorporates a high voltage half-bridge gate driver with a front end oscillator similar to the industry standard CMOS 555 timer. The IR2154 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 has been improved significantly, both by lowering the peak di/dt of the gate drivers, and by increasing the undervoltage lockout hysteresi...