Part Number:DRV8800
Hi
The customer want to operate their DC motor under following condition.
VM=8V
Iout(normal)=100mA
Iout(start)=500mA
Iout (motor lock) = 360mA
Iout (start) and Iout (motor lock) were obtained by motor unit test.
They want to turn off the driver when motor is locked.
1.
Is it possible to stop H bridge of driver and report nfault when output current reaches Itrip set by Rsense?
2.
Is the motor start-up current also affected by overcurrent setting by Itrip?
3.
According to datasheet, nFAULT is asserted under a motor fault, undervoltage, and over temperature.
SLVS855J, P12 9.3.8
"The nFAULT pin signals a problem with the chip via an open-drain output. A motor fault, undervoltage condition, or TJ > 160°C drives the pin low"
What is motor fault? Motor lock condition is implied?
BestRegards