DRV8701

SLVSCX5B – MARCH 2015 – REVISED JULY 2015

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7.4 Device Functional Modes

The DRV8701 is active unless the nSLEEP pin is brought low. In sleep mode, the charge pump is disabled, the

H-bridge FETs are High-Z, and the AVDD and DVDD regulators are disabled. Note that tSLEEP must elapse after

a falling edge on the nSLEEP pin before the device is in sleep mode. The DRV8701 is brought out of sleep mode

if nSLEEP is brought high. Note that tWAKE must elapse before the outputs change state after wake-up.

While nSLEEP is brought low, all external H-bridge FETs are disabled. The high-side gate pins GHx are pulled to

the output node SHx by an internal resistor, and the low-side gate pins GLx are pulled to GND.

When VM is not applied, and during the power-on time (tON), the outputs are disabled using weak pulldown

resistors between the GHx and SHx pins and between GLx and GND.

Table 8. Functional Modes

Condition

Charge Pump

GHx

GLx

AVDD and DVDD

Unpowered

VM < VUVLO

Disabled

Weak pulldown to SHx

Weak pulldown to GND

Disabled

VUVLO < VM

Sleep mode

Disabled

Strong pulldown to GND

Strong pulldown to GND

Disabled

nSLEEP low

VUVLO < VM

Operating

Enabled

Depends on inputs

Depends on inputs

Operating

nSLEEP high

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