E981.18A39FB ELMOS Semiconductor, E981.18A39FB Datasheet

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E981.18A39FB

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

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
Features
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
Applications
ÿ
ÿ
This document contains information on a pre-production product. ELMOS Semiconductor AG reserves the right to change specifications and information herein without notice.
8-CHANNEL AIRBAG SQUIB DRIVER
PRELIMINARY INFORMATION - AUG 01, 2011
ELMOS Semiconductor AG
8 current limiting high & low side drivers
Input operation range V
Two squib current modes (LCM and HCM)
selectable via SPI commands
Short circuit protection
Simultaneously firing of 4 loops possible,
Firing limitation counter
Squib channel diagnostics and monitoring
Independent voltage & squib supply voltage
diagnostics
Separate Low side and High side driver control
Internal free running oscillator
Test / select function for the drivers
Serial interface (SPI synchronous communication)
to µC (3.3V and 5V tolerant inputs)
Power-On-Reset circuit
Squib driver in a Restraint Diagnostic and
control Module (RDM)
Airbag Deployment
or 8 loops at Ux < 25
R
SQUIB
L
W
C
C
EMC
EMC
R
SQUIB
L
UX
W
8V to 35V
C
C
EMC
EMC
R
C
REF
V5
VS
SGND1
PGND
RREF
MISO
TEST
T8U
NC
NC
NC
V5
V5
Data Sheet
1/63
E981.18
General Description
The Eight Channel Squib Driver E981.18 is designed
specifically for automotive airbag applications. The IC
provides individual control and diagnostics for 8 float-
ing squibs. It has two sources of control, an arming
sensor signal and a µC signal via the SPI bus. An ac-
tive signal at the arming sensor input will activate all
selected drivers, which have been enabled by the µC.
During firing the squibs, the input voltage of the high
side switch is limited to 25V for LCM and 35V in HCM
by the system.
In order to limit the power dissipation of the driver
stages, internal firing limitation counters (FTL) are im-
plemented for each high side driver. Additionally an
over voltage detection for all 8 LSD (VTxL) output volt-
ages is provided to avoid a damage of the drivers in
case of a short to battery during firing or during driver
testing.
Ordering Information
Product ID
E981.18
C
BUF
T6U
NC
SGND
MOSI
SCK
LDB
AMX
MRB
ARM
NC
PGND
D1
D2
C
-40°C to +95°C
AOUT
C
Temp. Range
Tank
SPI_DATA_OUT
SPI_SELECT
SPI_CLK
VER
SAFETY
V5
ACD_IN
RESET
GND
QM-No.: 25DS0072E.00
VDD
External
µC
QFN44L7
E981.18
Package

Related parts for E981.18A39FB

E981.18A39FB Summary of contents

Page 1

... SQUIB SQUIB C C EMC 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 General Description The Eight Channel Squib Driver E981.18 is designed specifically for automotive airbag applications. The IC provides individual control and diagnostics for 8 float- ing squibs. It has two sources of control, an arming sensor signal and a µ ...

Page 2

... Airbag Squib Driver PRELIMINARY INFORMATION - AUG 01, 2011 1 Typical Application 1.1 Circuitry 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 Fig. 1: Typical Application Diagram Data Sheet Page E981.18 ...

Page 3

... The max. loop inductance is limited to 56µ valid for a closed loop and for an open loop condition during fault modes described in chapter 4.3. 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 ...

Page 4

... NC 33 T6U O, T5U O,HV 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 Pull Upper side of squib line 8 Not connected External reference resistor for squib resistance measurements Not connected ...

Page 5

... EDP D = Digital Analog Supply Input Output High Voltage 2.2 Package Pinout 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 Pull Upper side of squib line 4 Energy reserve for squib lines 3 and 4 ...

Page 6

... Airbag Squib Driver PRELIMINARY INFORMATION - AUG 01, 2011 3 Block Diagram 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 Fig. 3: Block Diagram Data Sheet Page E981.18 QM-No.: 25DS0072E.00 ...

Page 7

... The value presented above is typical only. Actual thermal performance will depend on die-size, die- pad size and presence of hot spots. The E981.18A is able to operate within specification for at least 15 squib driver activation's. 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 Condition ...

Page 8

... U cover the full range of specification. This is illustrated in Figure 4 and 5 below. 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 ...

Page 9

... WIRE PWB DSON ON_HSD ON_LSD I = 1.2A (LCM) / 1.75A (HCM) TXU_LIM_MIN 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 SQ_LOOP DSON Operation Area =f operation range for LCM; I ...

Page 10

... The maximum values for leakage and pulse energy outside of a firing event are given in Table 5 below. Currents flowing into the circuit pins have positive values. 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 Fig ...

Page 11

... SC is applied during a driver activation under reduced test mode condition, there will be the nominal DC current superposed. 2) Not tested during production test at ELMOS. Guaranteed by design. 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 Condition ...

Page 12

... Supply current Supply voltage V5 3 Power On Reset 4 Power Off Reset 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 ANL DIG Condition 4.5V<V5<5.5V all LSD and HSD disabled. ...

Page 13

... A MAX_TM 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 of the application by a diode. The pin must sustain minimum voltage level for a crash event after loss of ...

Page 14

... Error of input current Δ )/I U1-RREF U1 RREF U1 Table 8: Terminal U X 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 used for LSD gate charging LSDSUP Condition Symbol 8V<U <35V ...

Page 15

... No. Description 1 Voltage range V ANL 2 Power On threshold 3 Power Off threshold 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 voltage and supplies: 5 Condition 4.5V< V <5. DIG → ...

Page 16

... MRB 1.) MRB pulses with pulse length lower than T tested by ATPG scan test during ELMOS production test. 2.) 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 /U voltages and supplies: 1 ...

Page 17

... The reset values of all SPI-CMD registers, depending on the reset mechanism (POR/ SPI-Reset/ UNLOCK↑↓) is described in chapter 5.14. 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 Fig. 7: Reset and supply monitoring (see chapter 5 ...

Page 18

... FUSE Array read out is started after the power on reset pulse disappears (see chapter 5.13 and 5.15 for more detailed information about oscillator and trimming read out). 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 ...

Page 19

... Fig. 8 shows the SPI block configuration, Fig. 9 shows the principle of the address and data mode transfer. 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 Fig. 8: SPI block diagram Fig ...

Page 20

... Description 1 Output Low voltage 2 Output High voltage 3 High impedance output current during high level at pin LDB 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 Condition Symbol 4.5V<V <5. Di,L,MOSI,SCK 4.5V< ...

Page 21

... FE=Frame error: wrong Master command received (frame Bit length differs from 8 or 16Bit). BIT[7] PAR=Output Frame Parity BIT (safety); odd-Parity chosen. 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 Bit[5] ...

Page 22

... Data output access time MISO 2 Data output (MISO) valid after SCK 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 Condition SPI: Period SPI clock, 40% < duty cycle < 60% ...

Page 23

... Measurement condition: 1k Pull-Up resp. Pull-down resistor on pin MISO. Measurement from 90%LDB to 10%MISO rise, resp. 90% MISO fall 4.) Not tested during production test, guaranteed by design. 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 Condition C=< ...

Page 24

... Input Low voltage 2 Input High voltage 3 Internal pull down resistor 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 duration. TIMEOUT , the low side and high side drivers are ...

Page 25

... HSD Test Mode with reduced current level (TEST_UP Mode) The principle of the HSD control module is shown in pictures Fig. 11 below. 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 Condition ...

Page 26

... Test-Up Mode. During TEST-Up Mode, the counter value is coupled to the selected current modes (SPI CMD's 0x76 or 0x7C), too. The principle of the state transitions of the counter is sketched in Fig. 13. 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 Faultback mode: Ilim ...

Page 27

... Counter time. In this mode no driver activation is necessary. The FTL_OR and FTL_AND output scheme is given in Fig. 14 below: 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 Fig. 13 FTL state transition ...

Page 28

... Switch Test Mode with reduced current level (TEST_LOW Mode) The principle of the HSD control module is shown in pictures Fig. 15 below. 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 Fig. 14 FTL test ...

Page 29

... OV signal coming from the over voltage detection at the TxL. TxL 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 Fig. 15 LSD CTR-Module ), independently of ARM and UNLOCK signals. LIM ...

Page 30

... Additionally this signal is used to limit the maximum gate voltage of all HSD during a TEST_UP activation. (see chapter 5.11). 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 in MISO register ...

Page 31

... 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). 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 Fig ...

Page 32

... Possibility to detect an open PGND connection caused by bond wire demolition or open pin. The principle of the squib resistance diagnosis is shown in Fig. 18. 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 (time between TxUoff and TxLoff) has ...

Page 33

... Airbag Squib Driver PRELIMINARY INFORMATION - AUG 01, 2011 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 Fig. 18 Squib resistance diagnosis Data Sheet Page E981.18 QM-No.: 25DS0072E.00 ...

Page 34

... R is given in chapter 5.12.1, here the TxL and PGND bond wires are included. ON_LSD 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 =0, see chapter 5.12. mandatory to activate OV_BLNK_TxL_TM V → ...

Page 35

... A/D inputs on the external C. The multiplexer is represented by the six switches S1, S2, S3 and S4. The block circuitry is shown in Fig. 19. 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 ...

Page 36

... S1: 1. FUSEFAIL_REG: 2. TEST_LOW_REG: 3. TEST_UP_REG: 4. LCM_REG: 5. HCM_REG: 6. FTL_OR: 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 Fig. 19 Diagnosis block diagram Logic_H Error in trimming ARRAY Logic_H Test lower side active ...

Page 37

... IRREF: • TxU: 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 level. Otherwise maintains at logic low level (see Fig chapter 5.7.1) Logic AND combination of all 8 Firing Time Limiter (FTL). Switched to logic high level only if all 8 CNTR's end values are reached ...

Page 38

... AMX Output voltage range in amplification mode 5 AMX Common Mode Input range in amplification mode Table 28: AMX in differential amplifier mode, DC 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 Condition Symbol 4.5V<V <5.5V; ...

Page 39

... AMX Buffer mode,internal supply voltage V LSDSUP 6 Attenuation measurement 7 Attenuation of VA measurement 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 Condition Symbol 4.5V<V <5.5V SET, AMX_Amp Load at AMX: 100pF||R>1MΩ ...

Page 40

... AMX pin with the according SPI CMD set (see chapter 5.14). Fig. 20 shows the principle of the HSD Ilim control unit. 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 is exceeded, the SC event is latched in a register an can be read out at , ...

Page 41

... 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 ...

Page 42

... Airbag Squib Driver PRELIMINARY INFORMATION - AUG 01, 2011 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 Fig. 21: Gate-source clamping Fig 22 passive Gate PD structure Data Sheet Page E981.18 ...

Page 43

... Airbag Squib Driver PRELIMINARY INFORMATION - AUG 01, 2011 Fig 23 Reduced HSD 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 during SC to GND ILIM Data Sheet Page E981.18 ...

Page 44

... TxU pin are specified for the external package pins; so bond wire impedance's are included. DSON 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 Condition Symbol ...

Page 45

... Firing time limiter in Test Mode if current mode register is set to LCM; one for each HSD, controlled by the logic. 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 given in chapter 1.2. W Condition ...

Page 46

... HSD activation in TM. The definition of the dynamic parameters related to slew rate and delay's is illustrated also Fig below. 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 Condition ...

Page 47

... Low side driver 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 and LSD switch off (short to battery OV_BLNK Fig ...

Page 48

... No. Description 1 Internal polarization voltage 2 Bias impedance TxL 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 Fig. 26 LSD: Passive Gate PD Fig. 27 LSD: LSD gate protection Condition Symbol Driver and ...

Page 49

... Mode 5,1 Over voltage blank out timer, one for each LSD; valid for LCM and HCM 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 Condition Symbol I(TxL)=-1.2A for Ron ...

Page 50

... ON before the LSD activation in TM. The definition of the dynamic parameters related to slew rate and delay's is illustrated in Fig. 28 below. 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 Condition Symbol V > ...

Page 51

... Parameter is influencing time duration of the trimming array read out process. After this the oscillator is running in the calibrated mode. 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 ...

Page 52

... 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 Description No operation (NOP) ELMOS Test Modes 1) ELMOS Test Mode deactivates all polarization buffer outputs ...

Page 53

... 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 Description deactivate T6U activate T6U deactivate T7U activate T7U ...

Page 54

... 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 Description AMX → FTL_AND logic high level: all CNTR's limits reached. Otherwise ...

Page 55

... Table 39: CMD code for 0x60-0x6F, MUX-S4 CTRL 1) deactivation of the polarization unit necessary to eliminate the additional pull-up current from the buffer. 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 Description V+ → HiZ V+ → ...

Page 56

... Table 40: CMD code for 0x70-0x7F; Codelock and CM programming 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 Description CODELOCK/ current mode programming (LCM/HCM) ...

Page 57

... Table 41: CMD code for 0x80-0x9F, TxL activation/ deactivation 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 Description LSD activation/deactivation T1L-T4L deactivate T1L activate T1L ...

Page 58

... Table 43: CMD code for 0xB0-0xDF, CMD's not used 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 Description MUX S3 CTRL (V-) V- → GND V- → ...

Page 59

... This means a 0xE5 or 0XE7 CMD's will be rejected, while the device is in state “UNLOCKED”. Necessary to avoid reset of FTL during a firing sequence. Otherwise SOA violation of the driver possible. 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 Description ...

Page 60

... If the Fuse Array read out fails, the spec parameters of the High side and Low side driver currents in HCM, LCM and Test mode, the oscillator frequency and the 40mA reference current source can be violated in both directions. 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 Description ...

Page 61

... Input High voltage 3 Internal pull down resistor 6 Qualification 6.1 Qualification Reference Qualification is done according to AECQ100. 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 Condition Symbol 1 st read out T TRM_READY_1 ...

Page 62

... Packing Material shall be packed for shipment as follows: • Tape on reel • Moisture sensitivity: level 3 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 Page E981.18 QM-No.: 25DS0072E.00 ...

Page 63

... Alexandra Terrace • #09-31 The Comtech • Singapore 118502 © ELMOS Semiconductor AG, 2011. Reproduction, in part or whole, without the prior written consent of ELMOS Semiconductor AG, is prohibited. 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  ...

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