DRV8848: Drv8848 controlled by cc3200mod- is not working

idan Avitan

Part Number: DRV8848
Other Parts Discussed in Thread: CC3200MOD,

Hello,

I am using drv8848, controlled by cc3200mod, the driver is connected as shown in the schematics below,

the voltage is 12v, i don't use pwm, every input is connected to a different port on the cc3200mod, the controller signal are working fine,

here is the problem - when I send a signal to BINT 2 al the Bout and Aout are the same, Instead of only output Bout

Has anyone had this problem and know how to solve it?

over 7 years ago

0 Rick Duncan over 7 years ago

TI__Guru** 114905 points

Hi idan,

Please see section 7.3.3 of the datasheet. If the AIN1 and AIN2 inputs are floating as the device powers up or exits sleep, parallel mode is entered. This may have happened.

You can confirm this by:
1) If you have the ability to toggle nSLEEP with the mcu, set AIN1 and AIN2 low then toggle nSLEEP for 1ms
2) If you do not have the ability to toggle nSLEEP, connect a 10k pulldown resistor on AIN1 and AIN2. This will set the inputs to a logic low during powerup or exiting sleep.

0 idan Avitan over 7 years ago in reply to Rick Duncan

Prodigy 50 points

Thank you!

I worked, do I need to do the same with Bint?

0 Rick Duncan over 7 years ago in reply to idan Avitan

TI__Guru** 114905 points

Hi idan,

No, you do not need to do the same thing with BIN1 and BIN2. AIN1 and AIN2 are used to set the device in parallel mode. BIN1 and BIN2 are not used for this purpose.

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DRV8848: Drv8848 controlled by cc3200mod- is not working