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MC33797 Fiches technique(PDF) 13 Page - Freescale Semiconductor, Inc

No de pièce MC33797
Description  Four Channel Squib Driver IC
Download  32 Pages
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Fabricant  FREESCALE [Freescale Semiconductor, Inc]
Site Internet  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC33797 Fiches technique(HTML) 13 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
13
33797
DYNAMIC ELECTRICAL CHARACTERISTICS
FET DRIVERS
Turn-On Delay Time
CS
↑ to 80% IHS
tON
––
72
µs
Turn-Off Delay Time
CS
↑ to 20% IHS
tOFF
––
10
µs
Diagnostic Timing/Resolution
5.0 V
≤ VVDIAG_X ≤ 35 V, IHS ≥ IMEAS, 0 s ≤ tMEASURE_TIME ≤ 6.375 ms,
CSQUIB_HI = 0.12 µF, CSQUIB_LO = 0.12 µF
tRESOLUTION
21.25
25
28.75
µs
DIAGNOSTIC DELAY TIME
Squib Resistance Diagnostic Delay Time (21)
From CSB
↑ Until Transistor Test Results Are Valid, CSQUIB_HI = 0.12 µF,
CSQUIB_LO = 0.12 µF
tDIAG1
––
300
µs
Squib Open/Short Diagnostic Delay Time (21)
From CSB
↑ Until Squib Open/Short Diagnostic Results Are Valid,
CSQUIB_HI = 0.12 µF, CSQUIB_LO = 0.12 µF
tDIAG2
3000
µs
VDIAG Supply Diagnostic Delay Time From CSB
↑ until VDIAG Diagnostic
Results Are Valid (21)
tDIAG4
3000
µs
VFIRE Supply Diagnostic Delay Time
(21)
15 V
≤ VVDIAG_X ≤ 35 V, From CSB ↑ Until High-Side Safing Sensor
Diagnostic Results Are Valid, CVDIAG < 0.015 µF
tDIAG6
1000
µs
High-Side Safing Sensor Diagnostic Delay Time (21)
15 V
≤ VVDIAG_X ≤ 35 V, From CSB ↑ Until High-Side Safing Sensor
Diagnostic Results Are Valid, CVDIAG < 0.015 µF
tDIAG7
1000
µs
FET Drivers High- and Low-Side Driver Transistor Diagnostic Delay Time (21)
15 V
≤ VVDIAG_X ≤ 35 V, From CSB ↑ Until Transistor Test Results Are
Valid, CSQUIB_HI = 0.12 µF, CSQUIB_LO = 0.12 µF, CVDIAG < 0.015 µF
tDIAG9
1000
µs
VFIRE_RTN Diagnostic Delay Time (21)
From CSB
↑ Until VFIRE_RTN Diagnostic Results Are Valid
tDIAG10
––
300
µs
Squib Continuity Diagnostic Delay Time (21)
From CSB
↑ Until VTHSQBCON Diagnostic Results Are Valid
tDIAG11
3000
µs
Squib Short Between Firing Loops Diagnostic Delay Time From CSB
↑ Until
VTHSSQB Diagnostic Results Are Valid
(21)
tDIAG12
3000
µs
FEN INPUT TERMINAL
Minimum Pulse Width
FENFILTER
12
14
16
µs
Notes
21.
Guaranteed by Characterization
Table 5. Dynamic Electrical Characteristics (continued)
Characteristics noted under conditions 4.75 V VDD 5.25 V; 7.0 V VVFIRE_XX 35 V; VVDIAG_X = VVFIRE_XX; FEN 1 = FEN 2
= VDD; RR_LIMIT_X =10kΩ ±1%, RR_DIAG = 10 kΩ ±1%, -40°C TA +85°C, GND = 0 unless otherwise noted. Typical values
noted reflect the approximate parameter means at TA = 25°C under nominal conditions unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit


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