E981.18A39FB ELMOS Semiconductor, E981.18A39FB Datasheet - Page 31

• Manufacturer Part Number: E981.18A39FB
• Description: Motor / Motion / Ignition Controllers & Drivers 8ch squib driver
• Manufacturer: ELMOS Semiconductor
• Type: Airbag Squib Driverr

Specifications of E981.18A39FB

• Rohs: yes
• Product: Electromechanical Drivers
• Operating Supply Voltage: 5 V
• Supply Current: 4.3 mA
• Operating Temperature: - 40 C to + 95 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-44
• Number Of Outputs: 8
• Power Dissipation: 3.2 W

8-Channel Airbag Squib Driver
E981.18
PRELIMINARY INFORMATION - AUG 01, 2011
Fig. 16 Internal TM signal
It is not possible to activate the HSD and LSD switch test at the same time. They are locking each other
by hardware.
Sending SPI TEST_Up after SPI TEST_Low, the Test mode is switched from the low side to the high
side drivers and vice versa.
It is not possible to override low side and high side drivers at the same time. This implies that the
(TEST_UP|TEST_LOW) register contents can be (0|0),(0|1),(1|0) but never (1|1). The registers can be
switched to the analogue output AMX by the according SPI CMD (see more detailed description in
chapter 5.14 (SPI-CMD list) and chapter 5.10 (Diagnosis via AMX pin).
5.8
Recommended firing sequence
The following timing diagrams in Fig. 17 shows exemplarily the recommended sequence for firing a
single squib.
A synchronous firing of two or more groups of squibs and delayed firing of two or more groups of squibs
is also possible. (see 4.2 for maximum allowed SOA conditions).
Fig. 17 LSD CTR-Module
This document contains information on a pre-production product. ELMOS Semiconductor AG reserves the right to change specifications and information herein without notice.
ELMOS Semiconductor AG
Data Sheet
QM-No.: 25DS0072E.00
Page 31 of 63