SM72295 Datasheet, PDF (1/12 Pages) National Semiconductor (TI) – Photovoltaic Full Bridge Driver

SM72295
February 25, 2011
Photovoltaic Full Bridge Driver
General Description
The SM72295 is designed to drive 4 discrete N type
MOSFET’s in a full bridge configuration. The drivers provide
3A of peak current for fast efficient switching and integrated
high speed bootstrap diodes. Current sensing is provided by
2 transconductance amplifiers with externally programmable
gain and filtering to remove ripple current to provide average
current information to the control circuit. The current sense
amplifiers have buffered outputs available to provide a low
impedance interface to an A/D converter if needed. An exter-
nally programmable input over voltage comparator is also
included to shutdown all outputs. Under voltage lockout with
a PGOOD indicator prevents the drivers from operating if
VCC is too low.
Features
■ ^{Renewable Energy Grade}
■ ^{Dual Half Bridge MOSFET Drivers}
■ ^{Integrated 100V bootstrap diodes}
■ ^{Independent High and Low driver logic inputs}
■ ^{Bootstrap supply voltage range up to 115V DC}
■ ^{Two current sense amplifiers with externally}
programmable gain and buffered outputs
■ ^{Programmable over voltage protection}
■ ^{Supply rail under-voltage lockouts with power good}
indicator
Package
■ ^SOIC-28
Typical Application Circuit
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