DRV8302 Datasheet, PDF (15/21 Pages) Texas Instruments – Three Phase Pre-Driver with Dual Current Shunt Amplifiers and Buck Regulator – Hardware Controlled

DRV8302
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EVENT
PVDD
undervoltage
DVDD
undervoltage
GVDD
undervoltage
GVDD
overvoltage
OTW
OTSD_GATE
OTSD_BUCK
Buck output
undervoltage
Buck overload
External FET
overload – current limit
mode
External FET
overload – Latch mode
External FET
overload – reporting only
mode
Table 1. Fault and Warning Reporting and Handling
ACTION
External FETs HiZ;
Weak pull down of all gate
driver output
External FETs HiZ;
Weak pull down of all gate
driver output; When recovering,
reset all status registers
External FETs HiZ;
Weak pull down of all gate
driver output
External FETs HiZ;
Weak pull down of all gate driver output
Shut down the charge pump
Won’t recover and reset through
SPI reset command or
quick EN_GATE toggling
None
Gate driver latched shut down.
Weak pull down of all gate driver output
to force external FETs HiZ
Shut down the charge pump
OTSD of Buck
LATCH
N
REPORTING ON
FAULT PIN
Y
N
Y
N
Y
Y
Y
N
N
Y
Y
Y
N
UVLO_BUCK: auto-restart
N
Y, in PWRGD pin
Buck current limiting
(HiZ high side until current reaches
N
N
zero and then auto-recovering)
External FETs current Limiting
(only OC detected FET)
N
N
Weak pull down of gate driver
output and PWM logic “0” of
LS and HS in the same phase.
Y
Y
External FETs HiZ
Reporting only
N
N
SLES267 – AUGUST 2011
REPORTING ON
OCTW PIN
N
N
N
N
Y
Y
N
N
N
Y
Y
Y
Copyright © 2011, Texas Instruments Incorporated
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