L99ASC03 datasheet(14/73 Pages) STMICROELECTRONICS

部件名	L99ASC03

功能描述	Brushless / sensorless 3-phase motor pre-driver for automotive applications

PDF	73 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

14 / 73 page

Device description

L99ASC03

14/73

DocID023504 Rev 7

Figure 7. Watchdog in failure mode

2.5

Device operating modes

The device can be operated in four different modes:

•

Active Mode

•

Flash Mode

•

VDD Standby Mode

•

VBAT Standby Mode

2.5.1

Active Mode

The device operates with all its functions being available (VDD regulator, watchdog, gate

drivers, etc).

2.5.2

Flash Mode

To program the system microcontroller, the L99ASC03 can be operated in Flash Mode

where the internal watchdog is disabled and the other functions (see Table 3) remain

available. Flash mode is entered by applying on the BC pin a voltage higher than VBC,rising;

to guarantee the proper behavior of the device, the rising VBC slope must not exceed

10 V/µs.

In case VBC = VBC,rising during device power-up (VSREG connecting to VBAT), it has to be

assured that the SDI pin is at GND level (VSDI < 1.3 V, no external pull-up).

L99ASC03 数据表(PDF) 14 Page - STMicroelectronics