motor/driver prob

You have my sympathy, nothing worse than a fancy IC missbehaving.
I'd advise building a simple test circuit to test the driver one output stage at a time into a simple resistive load. This will acheive two ends.

1. It will test the driver.
2. It will give you confidence in driving it.
I sometimes think all IC's ate just blocks of plastic with legs, which only work because we have confidence in them. That's why things will work for me when Mrs Cat can't get them to work.
Del

Any chance of a (readable quality) schematic to look at of how you have connected your motor and exactly what type of motor it is.....etc etc?

Since u dont use d current sensing pins dropping yr voltage,why tie them to d ground?U can use a simple clamp meter to check yr current.

Yr motor rating is 12v dc,yr supply is 12v as well,yr problem is yr driver.Carry out a simple test on the motor if u are sure of yr motor terminal connections and probe yr driver.U must ensure dat yr motor is not underfed(ie recieves up to 12v).

For safety purpose,yr new driver must be tested seperately by disconnecting the motor from circuit.Feed yr driver with 12v supply and observe yr output voltage.If it gives out up to 12v or 11.5v,then u can feel safe to connect yr motor and yr job is done.Be sure dat yr motor is good and d terminal connection is correct.Always apply safety devices if available for safety of life and property.

Patrick Whowha

The maximum absolute current rating for DC operation of this chip, falls to 2 Amp. Make sure your motor rated current is 2 Amp. or less, if it is higher; this chip can have its drivers paralleled, there are 4 drivers inside to control either two motors or one with twice the current.

But first, check on your controller circuit, because if you are using PWM then you know that @ 50% duty cycle (wich can be commanded by your Vref of wathever external circuit you implemented) you will read on the meter about 6 Vdc. (depending on the carrier frequency).

If you don't need neither speed control, nor reversing rotation, quit on the chip and use a transistor or a relay.

Yahlasit