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IR21531 Datasheet(PDF) 1 Page - International Rectifier

Part # IR21531
Description  SELF-OSCILLATING HALF-BRIDGE DRIVER
Download  9 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IR21531 Datasheet(HTML) 1 Page - International Rectifier

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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
Preliminary Data Sheet No. PD60131 revM
SELF-OSCILLATING HALF-BRIDGE DRIVER
Product Summary
VOFFSET
600V max.
Duty Cycle
50%
Tr/Tp
80/40ns
Vclamp
15.6V
Deadtime (typ.)
0.6
µs
Typical Connections
IR21531(D)(S)&(PbF)
Description
The IR21531(D)(S) are an improved version of the
popular IR2155 and IR2151 gate driver ICs, and in-
corporates 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 has been improved significantly, both by lowering the peak di/dt of the gate drivers,
and by increasing the undervoltage lockout hysteresis to 1V. Finally, special attention has been payed to
maximizing the latch immunity of the device, and providing comprehensive ESD protection on all pins.
IR21531(D)
IR21531(S)
VB
HO
VS
LO
VCC
RT
CT
COM
600V
MAX
Shutdown
VB
HO
VS
LO
VCC
RT
CT
COM
600V
MAX
Shutdown
www.irf.com
1
Packages
8 Lead PDIP
8 Lead SOIC


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