L9658 datasheet(1/64 Pages) STMICROELECTRONICS

部件名	L9658

功能描述	Analog output available for resistance

PDF	64 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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1 / 64 page

September 2013

Doc ID 14219 Rev 3

1/64

1

L9658

Octal squib driver and quad sensor interface

ASIC for safety application

Features

■ 8 deployment drivers sized to deliver 1.2 A

(min) for 2 ms (min) and 1.75 A (min) for 1 ms

(min)

■ Independently controlled high-side and low-

side MOS for diagnosis

■ Analog output available for resistance

■ Squib short to ground, short to battery and

MOS diagnostic available on SPI register

■ Capability to deploy the squib with 1.2 A (min)

or 1.75 A under 35 V load-dump condition and

the low side MOS is shorted to ground

■ Capability to deploy the squib with 1.2 A (min)

at 6.9 V VRES and 1.75 A at 12 V VRES

■ Interface with 4 satellite sensors

■ Programmable independent current trip points

for each satellite channel

■ Support Manchester protocol for satellite

sensors

■ Supports for variable bit rate detection

■ Independent current limit and fault timer

shutdown protection for each satellite output

■ Short to ground and short to battery detection

and reporting for each satellite channel

■ 5.5 MHz SPI interface

■ Satellite message error detection

■ Hall effect sensor support on satellite channels

3 and 4.

■ Low voltage internal reset

■ 2 kV ESD capability on all pins

■ Package: 64 leads LQFP

■ Technology: ST proprietary BCD5s (0.57 µm)

Description

L9658 is intended to deploy up to 8 squibs and to

interface up to 4 satellites. 2 satellite interfaces

can be used to interface Hall sensors.

Squib drivers are sized to deploy 1.2 A minimum

for 2 ms minimum during load dump and 1.75 A

minimum for 1ms minimum during load dump.

Diagnostic of squib driver and squib resistance

measurement is controlled by micro controller.

Satellite interfaces support Manchester decoder

with variable bit rate.

LQFP64

Table 1.

Device summary

Order code

Package

Packing

L9658

LQFP64

Tray

L9658TR

LQFP64

Tape and reel

www.st.com

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