33797 Datasheet, PDF (10/34 Pages) Freescale Semiconductor, Inc – Four Channel Squib Driver IC

ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics (continued)
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
Voltage Threshold for SQB_LO or SQB_HI Shorted to Ground with an Open _{VTHSG_SO}
1.3
1.8
2.0
V
Squib using $C3 Command
R_SQUIB = Open
DIAGNOSTICS FOR SQUIB CONTINUITY BETWEEN SENSE_XX AND SQB_LO_XX ($C2 COMMAND)
Current Threshold for SQUIB_LO_1A, 1B, 2A, and 2B Continuity Check for
Standard and Cross-coupled Conditions ($C2) SQUIB_LO_XXCONT ⁽¹⁵⁾
I_{THSQB CON}
150
–
350
mA
7.0 V ≤ V_{VDIAG_X} ≤ 35 V
DIAGNOSTICS FOR SQUIB SHORT BETWEEN FIRING LOOPS ($E0–$E3, $E8 COMMANDS)
Voltage Threshold for Standard Squib Connection
7.0 V ≤ V_{VDIAG_X} ≤ 35 V
V_THSQBNOM
V
1.0
1.4
2.0
Voltage Threshold for SQUIB_X Shorted to SQUIB_Y (1 or More Shorted
V_THSSQB
V
Conditions)
Short Between Squib Lines (Loops) (SQUIB_XX_SSQB_YY) ⁽¹⁶⁾
1.0
1.4
2.0
VDIAG SUPPLY DIAGNOSTICS ($C0 COMMAND)
VDIAG Supply Voltage High Threshold
V_DHI
VDIAG Supply Voltage Low Threshold
V_DLO
VFIRE SUPPLY DIAGNOSTICS VFIRE_1B AND VFIRE_2B ($C5 COMMAND)
15
17
18.3
V
5.7
6.5
7.0
V
VFIRE Supply Voltage High Threshold
V_FDHI
15
17
18.3
V
VFIRE Supply Voltage Low Threshold
V_FLO
5.7
6.5
7.0
V
VDIAG SUPPLY DIAGNOSTICS VDIAG_1 AND VDIAG_2 (ADDITIONAL VOLTAGE THRESHOLDS) ($C5 COMMAND)
VDIAG Supply Voltage Threshold 4
VDIAG Supply Voltage Threshold 3
VDIAG Supply Voltage Threshold 2
VDIAG Supply Voltage Threshold 1
VFIRE_RTN DIAGNOSTICS ($C9 COMMAND)
V_{VDIAG_X} V4
V_{VDIAG_X} V3
V_{VDIAG_X} V2
V_{VDIAG_X} V1
30.2
25.5
20.5
16
32.8
27.7
22.6
18.4
36.2
V
30.2
V
25.5
V
20.5
V
R_RTN1 Short-to-Ground Threshold (Open Ground Connection)
R_RTN2 Short-to-Ground Threshold (Open Ground Connection)
HIGH-SIDE SAFING SENSOR DIAGNOSTICS ($C0 COMMAND)
R_RTN1
0.15
–
R_RTN2
0.15
–
0.6
Ω
0.6
Ω
R_HS Valid Resistor Range
15 V ≤ V_{VDIAG_X} ≤ 35 V
R_HS
kΩ
4.1
5.1
6.1
R_HS Open Threshold
15 V ≤ V_{VDIAG_X} ≤ 35 V
R_HSO
kΩ
6.1
7.2
9.0
Notes
15 XX = 1A, 1B, 2A, or 2B
16 XX and YY = 1A, 1B, 2A, or 2B
33797
10
Analog Integrated Circuit Device Data
Freescale Semiconductor