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L99ASC03 데이터시트(PDF) 17 Page - STMicroelectronics

부품명 L99ASC03
상세설명  Brushless / sensorless 3-phase motor pre-driver for automotive applications
PDF  73 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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L99ASC03 데이터시트(HTML) 17 Page - STMicroelectronics

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DocID023504 Rev 7
17/73
L99ASC03
Device description
72
2.5.6
Functional overview
2.6
DIS pin
The DIS pin allows turning off the gate drivers when applying an external signal to it. A logic
low signal enables the gate drivers, whereas a logic high signal disables the gate drivers.
The state of the DIS pin is reported in the DISABLE flag. To activate the gate drivers, the
DIS pin has to be pulled low and the DISABLE flag has to be cleared by an SPI "Read &
Clear" command. An internal pull-up resistor is integrated for this pin.
2.7
INH pin
The INH pin can be used as a wake-up source connected to ignition through an external
resistor. An internal comparator detects a high level and generates a wake-up event. The
INHST bit reflects the current logic state of this pin.
2.8
Thermal warning and thermal shutdown
To allow for different application requirements, two temperature modes with their respective
diagnostics can be selected via SPI.
Table 3. Functional overview
Function
Operating mode
Active mode
FLASH mode
VDD
standby
VBAT
standby
Normal
Fail-safe
VDD voltage regulator
ON(1)
1.
OFF in case Tj > TSD2
ON
ON
OFF
Reset generator
ON
ON
ON
OFF
Interrupt generator
OFF
OFF
ON
ON
Window watchdog
ON
OFF
OFF(2)
2.
ON when IVDD > ICMP and SPI bit ICMP = 0
OFF
Gate driver
ON
OFF
ON
OFF
OFF
Charge pump
ON
OFF
ON
OFF
OFF
CSA
ON
OFF
ON
OFF
OFF
BEMF module
ON
OFF
ON
OFF
OFF
Oscillator
ON
ON
OFF(3)
3.
ON during wake-up event, temperature and ICMP filtering
OFF(3)
Diagnostics
ON
ON
OFF(4)
4.
Temperature, ICMP monitoring and VDD undervoltage detection are active
OFF



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