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VNF1048F データシート(PDF) 35 Page - STMicroelectronics

部品番号 VNF1048F
部品情報  High-side switch Controller with intelligent fuse protection for 12 V, 24 V and 48 V automotive applications
PDF  52 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VNF1048F データシート(HTML) 35 Page - STMicroelectronics

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Bit
Default
Name
Description
8 ÷ 5
0000
NTC_THR
Configures a threshold for External MOSFET over-temperature shutdown via NTC. The
threshold can be set in the range 37.50 to 110.92.
See Table 17
4 ÷ 3
00
WD_TIME
Watchdog time selection:
00: tWD = 50ms
01: tWD = 100ms
10: tWD = 150ms
11: tWD = 200ms
2
0
DIS_OUT_MODE
Outputs status in Locked state:
0: leave output and bypass as they are (default)
1: shut off output and bypass
1
0
WD_TRIG
In order to keep device in Unlocked Mode, this bit must be cyclically toggled within a
period equal to tWD to refresh the watchdog.
0
Parity Bit
Odd Parity Bit Check
6.14
Status registers
Table 38. SR#1: Status Register 1; Address 11h (ID 14.1)
Bit
Default
Name
Description
Access
23 ÷ 19
unused
18
0
DIS_OUT_FAULT
Disable Output Fault:
a transition to Locked Mode state causes this bit to be set to 1, but only when
DIS_OUT_MODE = 1.
When DIS_OUT_FAULT = 1, both High Side and Bypass are switched off.
R/C
17
0
SELFTEST
Self-Test state flag bit
R
16
0
OUTST
High Side Gate Driver Status Bit
1: HS Gate Driver turned on
0: HS Gate Driver turned off
R
15
0
BYPASSST
Low Current Bypass Status Bit
1: LCB turned on
0: LCB turned off
R
14
0
WAKEUPM
Wake Up mode flag bit
R
13
0
LOCKEDM
Locked Mode flag bit
R
12
0
HWLO_ST
HWLO mirror bit: provides the logical level of HWLO pin after having applied a
symmetrical filter on both its rising and falling edges (filtering time is tHWLO)
R
11
0
VS_UV
VS undervoltage “real-time” bit
0: VS >VUSD + VS_USD_HYS
1: VS ≤ VS_USD If the battery supply voltage VS falls below the under-voltage
shutdown threshold, then the External MOSFET, the charge pump and the
bypass switch are switched off.
R
10
0
HSHT
Hard short circuit latch-off: a hard short circuit shut-down of the MOSFET
(HSHT = 1) and the bypass switch occurs when the current sense voltage
exceeds the preset threshold.
The MOSFET and the bypass switch are re-armed via SPI.
R/C
VNF1048F
Status registers
DS13084 - Rev 6
page 35/52



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