application: bike lock
2 chip is tested ,after 1000-times test,one is burned out.
vm=4.2V, Iout<550mA
test is bellow: a single cycle
( in1,in2 =01
after 1s ,
in1,in2=11
50us delay,
in1,in2=00
50us delay,
sleep =0 )DRV8837C 烧芯片问题.zip
after burning out the chip, testing the resistence,
the resistence between the VM and GND =1.8 ohm
the resistence between the out1 and GND =1.4 ohm
the resistence between the out2 and GND =1.4 ohm