L9659 Datasheet, PDF (1/51 Pages) STMicroelectronics – Octal squib driver ASIC for safety application

L9659
Octal squib driver ASIC for safety application
Features
■ 8 deployment drivers with SPI selectable firing
current and times
■ Capability to deploy the squib with 1.2 A
(min)/2 ms, 1.75 A (min)/1.0 ms and 1.75 A
(min)/0.65 ms between VRES of 7 V to 37 V
■ Capability to deploy the squib with 1.5 A
(min)/2 ms between VRES of 7 V to 25 V
■ Firing capability to deploy all channels
simultaneously
■ Independently controlled high-side and low-
side MOS for diagnosis
■ Analog output available for resistance measurement
■ Squib short to ground, short to battery and
MOS diagnostic available on SPI register
■ Capability to deploy the squib the low side
MOS is shorted to ground
■ 4 fire enable inputs
■ 5.5 MHz SPI interface
■ Low voltage internal reset
■ 2 kV ESD capability on all pins
■ Package: LQFP64
Table 1. Device summary
Order code
Amb. temp range, C
L9659
-40 to +95
L9659TR
-40 to +95
'!0'03
LQFP64 (10x10x1.4mm)
■ Technology: ST proprietary BCD5 (0.65 µm)
■ RoHS compliant
Description
The L9659 is intended to deploy up to 8 squibs.
Squib drivers are sized to deploy 1.2 A minimum
for 2 ms, 1.75 A minimum for 1 ms and 1.75 A
minimum for 0.65 ms during load dump along with
1.5 A minimum for 2 ms for VRES voltages less
than 25 V.
Full diagnostic capabilities of the squib interface
are provided.
Package
LQFP64
LQFP64
Packing
Tray
Tape and reel
September 2013
Doc ID 022048 Rev 2
1/51
www.st.com
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