TPIC71008-Q1 Datasheet, PDF (1/10 Pages) Texas Instruments – Eight-Channel Squib Drivers

TPIC71008-Q1
www.ti.com
Eight-Channel Squib Drivers
Check for Samples: TPIC71008-Q1
SLVSAX3 – JUNE 2011
FEATURES
1
• Eight-channel squib drivers for airbag
application
• Loop diagnostics monitor and reporting
• Two logic inputs providing independent safing
logic for enabling/disabling deployment
• Eight independent thermally protected High
Side drivers that can source deployment or
diagnostic current level to each squib load
• Eight independent avalanche voltage and
thermally protected Low Side drivers that can
sink deployment or diagnostic current level
from each squib load
• Each output capable of 1.2A/1.75A firing
current for typical 2ms/0.5ms
• SPI Slave Interface for serial bus
communication with parity check
• Firing VZx voltage range 10V to 35V, transients
up to 40V
• Programmable firing time up to 8.2 ms
• Common Load current settings for all
deployment loops, using registers
• Individual firing current timer limit set for each
deployment loop, using registers
• Firing current timer to monitor firing current
over deployment time for each deployment
loop
• Independent switch control for both high and
low side switches
• Diagnostic mode for fault checking
• Internal fault monitoring for safe operation
• A multiplex-able output buffer for analog
voltage measurements
• Use of external clamping devices on squib
pins is not required to protect the deployment
ASIC against substrate injection effects during
deployment due to dynamic shorts to ground
• An external pin connection to the
microprocessor ADC supply for ratio-metric
squib resistance measurement.
• 40V pin capability on all pins (except GNDx,
AGND, DGND, VCC5, VDDIO, AMX_OUT)
• Operating ambient temperature range: -40°C to
105°C
• Thermally enhanced 48-pin TSSOP DCA
PowerPad package
APPLICATIONS
• Squib Drivers for Airbag Application
Z6 1
ZM6 2
VZ0 ³
Z0 ⁴
ZM0 5
GND0 6
TEST1 7
VCC5 8
IWD 9
AMX_OUT 10
DGND1 11
AGND1 12
SQREF1 13
SQREF2 14
VADC 15
TEST2 16
VA2 ¹⁷
TEST2 18
GND1 19
ZM1 20
Z1 ²¹
VZ1 22
ZM4 23
Z4 ²⁴
GND0
Z6
DIAG
Z4
GND1
GND3
Z7
SPI/
Digital
BIAS
GND2
48 Z7
47 _ZM7
46 VZ3
45 Z3
44 ZM3
43 GND3
42 DGND2
41 SOMI
40 SOMO
39 SCLK
38 CS_N
37 TZ
36 RESET_N
35 VDDIO
34 AGND
33 VA1
32 TEST4
31 NC
30 GND2
29 ZM2
28 Z2
27 VZ2
26 ZM5
25 Z5
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2011, Texas Instruments Incorporated