E981.18A39FB ELMOS Semiconductor, E981.18A39FB Datasheet - Page 41

• 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. 20 TXU (HSD) Ilim-control block circuitry
Each driver is provided with a passive gate pull down structure unit, disabled during activation, and a
gate to source clamping. The passive gate structure is a redundant (safety) feature of the HSD control
module.
Both is sketched in Fig. 21 and Fig 22 below.
The HSD locking is suspended only if the internal PORB reset signal is at high level (see chapter 5.3).
Additional either the TEST_UP mode have to be selected by an according SPI CMD or the UNLOCK
and the ARM signals have to be at high level. In the first case the HSD can be activated under Test
Mode conditions, where all complement Low side drivers are locked. In the second case the diver can
be activated under normal firing conditions by an according SPI CMD.
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 41 of 63