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| 型号： | MCZ33797EKR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 1/36页 |
| 文件大小： | 0K |
| 描述： | IC SQUIB DRIVER 2CHAN 32-SOIC |
| 标准包装： | 1,000 |
| 系列： | * |
| 应用： | * |
| 接口： | * |
| 电源电压： | * |
| 封装/外壳： | 32-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 32-SOIC |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
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Document Number: MC33797
Rev 6.0, 2/2014
Freescale Semiconductor
Technical Data
Freescale Semiconductor, Inc., 2006 - 2014. All rights reserved.
Four Channel Squib Driver IC
The Four Channel Squib Driver IC is a complete squib diagnostic and
deployment interface for use in automotive air bag modules.
Extensive diagnostics and system control features are incorporated
to provide fail-safe operation. The device contains a serial peripheral
interface (SPI) compatible 8-bit interface to allow microprocessor
control.
The device has the capability to be used in a standard four channel
squib driver IC or in a cross-coupled state with the high and low side
squib drivers located on separate squib driver ICs. Both the high and
low side output drivers are protected against temporary shorts to
battery or ground. The current limit threshold is set by an external
resistor. This device is powered by SMARTMOS technology.
Features
Four channel high side and low side 2.0 A FET switches
Externally adjustable FET current limiting
Adjustable current limit range: 0.8 to 2.0 A
Individual channel current limit detection with timing duration
measurement, communicated via the SPI
8-Bit SPI for diagnostics and FET switch activation
Diagnostics for high side safing sensor status
Resistance and voltage diagnostics for squibs
Squib driver IC capability to be used for cross-coupled driver firing
application (allows high and low side FET switches to be located
on separate squib driver ICs)
Figure 1. 33797 Simplified Application Diagram
SQUIB DRIVER
33797
EW SUFFIX (PB-FREE)
98ARH99137A
32-PIN SOICW
Applications
Automotive air bag deployment
Automatic seat belt retention
Computer controlled model rocketry igniters
Remote firing of pyrotechnic and firework displays
Computer controlled firing of blasting caps for
mining and construction
Military or police weapon systems
VIN
VBOS1
VBOOST2
5.0 V
VPWR
VDIA_
VFIRE_1
VFIRE_1B
VFIRE_2A
VFIRE_2B
VDD
CS
CLK
MISO
MOSI
RST
FEN1
FEN_2
SQB_HI
SENSE
SQB_LO
VFIRE_RTN
R_LIMIT_1
R_LIMIT_2
R_DIAG
GND
ENABLE
33797
Microprocessor
Typical
Air Bag
Power Supply
VDIAG_2
FIRING
CAP
FIRING
CAP
Squib
(1A, B 2A, 2B)
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