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Original question:

DRV10983-Q1: Unable to write to EEPROM, eeReadyStatus never = 1

DRV10983-Q1: TURN OFF FAN WITHOUT ENTERING INTO THE SLEEP MODE

KAMAL zinzuvadiya
Prodigy 50 points
Part Number: DRV10983-Q1
Other Parts Discussed in Thread: DRV10983,

Hello sir, i work with the part with stm8s003f3p6. I am powering stm by 5v come from buck  converter of drv10983. now problem comes when i trying turn off fan using duty down to zero the drv10983 enter into sleep mode and drv turning off  the controller . also while  i  am trying to restart the system using powering off and on its not start due to last duty i saved through controller. now i want suggestion for turn off my fan without DRV enter into sleep mode.

  • +1
    TI__Mastermind 19640 points

    Hello Kamal,

    Thank you for posting to the MD forum. There are a couple of suggestions mostly because I am unsure of which version of DRV10983 you are using. DRV10983 has a couple of versions the DRV10983-Q1 and the DRV10983.

    Your post is regarding DRV10983-Q1, so assuming this is the device you have, the DRV1093-Q1 has two versions, the DRV10983SQ and DRV10983Q. The difference between the two is that the DRV10983SQ does not contain a sleep mode but instead it contains a standby mode which keeps the step down buck regulator active when there is no PWM input. My suggestion would be to move to the DRV10983SQ. Below are other suggestions if you are using the DRV10983 or if you do not need an automotive grade device.

    You can move to DRV10983 which contains a register setting in order to disable sleep mode, sleepDis which can be found in register 0x03. Setting sleepDis = 1 prevents the device form entering sleep mode. This would prevent your MCU from losing power and entering that power loop condition you are entering. DRV10983 also has a standby option which is just DRV10983, the sleep mode option is DRV10983Z which is the version you would want to avoid in your scenario. The standby mode version will keep the buck regulator active when no PWM input is present.

    I hope this helps, let me know if you have any other questions!

    Best,

    Isaac

  • +1 in reply to Isaac Lara
    Prodigy 50 points

    Thank your for your good suggestion. i am working with DRV10983-Q1 ,i will work on that also i have query that can we solve this problem by programming side  or adding external 5V supply to  STM8S controller.