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L9945 Folha de dados(PDF) 135 Page - STMicroelectronics

Nome de Peças L9945
Descrição Electrónicos  Automotive fully configurable 8-channel High/Low side MOSFET pre-driver suitable for 12 V and 24 V systems
PDF  151 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9945 Folha de dados(HTML) 135 Page - STMicroelectronics

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Table 44. Deglitch filter time for OFF state diagnostics
Symbol
Parameter
Min.
Max.
Unit
tFIL_OFF
Deglitch filter time for OFF state diagnostics
0.3
0.5
µs
Figure 36. Deglitch and settling filter times for OFF state diagnostics: (left) STG detection on LS; (right) STB detection
on HS
t
t
t
t
t
t
Transient
fault
t
t
GADG1303170949PS
No OL/STG
transition
ON → OFF
DIAG
t
FIL_OFF
t
OL
V
LVT
V
LS OFF Diagnostics
Vout
Fast charge
fault
Transient
counter
Settling
filter
Deglitch
STG
fault
Permanent
No OL/STB
transition
ON → OFF
discharge
Fast
counter
Settling
filter
Deglitch
DIAG
t
FIL_OFF
t
OL
V
LVT
V
HS OFF Diagnostics
Vout
STB
fault
Permanent
Note:
Vout corresponds to DRNx pin for LS NMOS and HS PMOS configurations, while it's SNGPx pin for HS NMOS
configuration.
6.4.2
Diagnostic thresholds
The diagnostic thresholds are fixed, as shown in the table below. They have been designed in tracking, thus both
spreading in the same direction.
Table 45. OFF state diagnostic thresholds
Symbol
Parameter
Min.
Max.
Unit
VLVT
Threshold for:
•
STG detection in LS config (Vout < VLVT)
•
OL detection in HS/LS config (VLVT < Vout < VOL)
1.9
2.3
V
VOL
Threshold for:
•
STB detection in HS config (Vout > VOL)
•
OL detection in HS/LS config (VLVT < Vout < VOL)
2.8
3.4
V
Note:
Vout corresponds to DRNx pin for LS NMOS and HS PMOS configurations, while it's SNGPx pin for HS NMOS
configuration.
L9945
OFF state diagnostics
DS12275 - Rev 8
page 135/151



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