33797 Datasheet, PDF (7/34 Pages) Freescale Semiconductor, Inc – Four Channel Squib Driver IC

ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics
Characteristics noted under conditions 4.75 V ≤ V_DD ≤ 5.25 V; 7.0 V ≤ V_{VFIRE_XX} ≤ 35 V; V_{VDIAG_X} = V_{VFIRE_XX}; FEN 1 = FEN 2
= V_DD; R_{R_LIMIT_X} = 10 kΩ ±1%, R_{R_DIAG} = 10 kΩ ±1%, -40°C ≤ T_A ≤ +85°C, GND = 0 unless otherwise noted. Typical values
noted reflect the approximate parameter means at T_A = 25°C under nominal conditions unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
INPUT VOLTAGE (VDD)
Input Voltage
FET DRIVERS
V_DD
4.57
5.0
5.25
V
Leakage Current at Minimum High Side Driver Breakdown Voltage
I_DHSD
–
39
100
µA
Leakage Current at Minimum Low Side Driver Breakdown Voltage
I_DLSD
–
65
100
µA
High-Side Driver Current Limit Range Set via Rlimit Resistor with Low
Battery Condition
I_HS(LBAT)
t_ON ≤ 4.0 ms, R_{R_LIMIT_X} = 10 kΩ, 5.0 V ≤ V_VFIRE ≤ 7.0 V, R_SQUIB =
2.0 Ω
1.09
1.4
A
2.9
High-Side Driver Low Current Limit Range Set via Rlimit Resistor
t_ON ≤ 2.6 ms, R_{R_LIMIT_X} = R_L=4.32 kΩ, 7.0 V ≤ V_VFIRE ≤ 35 V
High-Side Driver Nominal Current Limit Range Set via Rlimit Resistor
t_ON ≤ 2.6 ms, R_{R_LIMIT_X} = R_L=10 kΩ, 7.0 V ≤ V_VFIRE ≤ 35 V
I_HS(LOSET)
I_HS(NOM)
0.81
1.21
0.93
1.4
A
1.03
A
1.54
High-Side Driver High Current Limit Range Set via Rlimit Resistor
t_ON ≤ 0.8 ms, R_{R_LIMIT_X} = R_L=45.3 kΩ, 7.0 V ≤ V_VFIRE ≤ 35 V
Low-Side Drivers Current Limit
7.0 V = SQLO < 16 V
SQLO = 16 V
High-Side Driver Current Limit Detect Threshold ⁽⁷⁾
7.0 V ≤ V_VFIRE ≤ 35 V
Driver ON Resistance (per FET)
V_VFIRE = 5.0 V, I_LOAD = 0.5 A
I_HS(HISET)
I_LS
I_MEAS
R_DS(ON)
1.76
2.1
2.24
I_HS x 0.85
–
2.0
2.47
2.65
–
–
A
2.24
A
3.0
3.14
A
I_HS x 1.0
Ω
1.0
VDD Operating Current
Standby (Diagnostics off, SPI “OFF”)
No Fire—Worst Case Diagnostics ($83/$2F Command Active)
Firing (with All FET Drivers “ON”)
VFIRE Quiescent Current ⁽⁸⁾
With Diagnostics Off
VDIAG Current During Squib Diagnostics
With Squib Resistance Diagnostics Active
VFIRE Operating Current During Firing
Excluding Firing Current, I_HS = 2.0 A
VDIAG Operating Current During Firing
Per V_DIAG pin, excluding Firing Current, I_HS = 2.0 A
I_DD
I_RRE
I_RRE
I_RRE
I_RRE
mA
–
2.0
5.0
–
15
17.5
–
4.3
6.0
µA
22
34
55
mA
32
37
43
mA
–
1.8
10
µA
–
140
200
Notes
7 Guaranteed by design
8 VFIRE quiescent current includes any leakage current through squib.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33797
7