L99ASC03 datasheet(15/73 Pages) STMICROELECTRONICS

Part #	L99ASC03

Description	Brushless / sensorless 3-phase motor pre-driver for automotive applications

PDF	73 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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15 / 73 page

DocID023504 Rev 7

15/73

L99ASC03

Device description

2.5.3

VDD Standby Mode

When the device is in VDD Standby Mode, the gate drivers, the charge pump and the CSA

are disabled (SPI activation or INH pin will act as a wake-up). To supply the microcontroller

in a low-power mode, the VDD voltage regulator remains active. After any wake-up event,

the device switches to Active Mode and a negative pulse (typ. 56 µs) is generated on NINT

pin.

The transition from Active Mode to VDD Standby Mode is selected through the STBYSEL

and the GOSTBY bits.

2.5.4

VBAT Standby Mode

When in VBAT Standby Mode, the VDD voltage regulator is turned off to achieve the lowest

current consumption and the device monitors the occurrence of a wake-up event. After any

wake-up event, the device transitions to Active Mode. The internal SPI register content is

preserved.

The transition from Active Mode to VBAT Standby Mode is selected through the STBYSEL

and the GOSTBY bits. This transition can also occur in case of persistent fault conditions.

L99ASC03 Datasheet(PDF) 15 Page - STMicroelectronics