DRV8705-Q1: about DRV8705-Q1 DVDD leakage current

zhengwei zhou

Prodigy 95 points

Part Number: DRV8705-Q1

In my application DVDD uses an external LDO.

This LDO also provides power for the MCU.

The system leakage current requirement is less than 100uA.

If a switch circuit needed between the LDO output & DVDD Pin?

over 2 years ago

0 Pablo Armet over 2 years ago

TI__Mastermind 37683 points

Hi Zhengwei,

The leakage current of DVDD while device is in sleep mode and PVDD=13.5V is 2uA typical. So no switch is needed.

0 zhengwei zhou over 2 years ago in reply to Pablo Armet

Prodigy 95 points

Is there a switch to control DVDD in the IC?

0 Pablo Armet over 2 years ago in reply to zhengwei zhou

TI__Mastermind 37683 points

Hi Zhengwei,

The IC does not have an internal DVDD switch. So if you want to disconnect DVDD from the driver, you can use a switch to reduce the leakage current when the device is in sleep mode.

0 zhengwei zhou over 2 years ago in reply to Pablo Armet

Prodigy 95 points

what‘s the test condition？

What is GAIN，VDS，IDRIVE & MODE pin external circuit？

0 Pablo Armet over 2 years ago in reply to zhengwei zhou

TI__Mastermind 37683 points

Hi Zhengwei,

The test conditions id V_PVDD=13.5V and T_J=25C. This specification is only applicable for the current through the DVDD pin. The excess current from the GAIN resistor is not included in this specification.

The pin diagrams are shown in section 7.3.7 of the datasheet.

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DRV8705-Q1: about DRV8705-Q1 DVDD leakage current