CONFIDENTIAL AND PROPRIETARY

© Copyright 2004 Melexis Microelectronic Integrated Systems. All Rights Reserved

Seatbelt/ISOFix Sensor IC

MLX16305

CONFIDENTIAL AND PROPRIETARY

© Copyright 2004 Melexis Microelectronic Integrated Systems. All Rights Reserved

MLX16305 - Block Diagram

Package : SO16n

Direct supplied from the 12V battery

-40ºC to 85ºC operating temp. range

Number of Channels : 6

6 Fully protected sense outputs (Schaffner Pulses, short to GND/Battery,

LoadDump pulses)

Externally adjustable over-current protection

Overtemperature protection

Features diagnostics of failure modes

loads compatible : resistive, current source, etc …

1mA to 40mA current measurement range with +/- 5% accuracy

3V .. 7V output voltage measurement range

CONFIDENTIAL AND PROPRIETARY

© Copyright 2004 Melexis Microelectronic Integrated Systems. All Rights Reserved

Switches symbolizingother Seat-belts buckles

16305

VDD

5

Vref

DigitalControl

Voltage/Currentmeasurement

MLX16305 - Application example 1

Click !

2 / Select channel1 / Fasten seatbelt 3 / Read Current (or Voltage) value

I=30mA

Seatbelt fastened !!!

CONFIDENTIAL AND PROPRIETARY

© Copyright 2004 Melexis Microelectronic Integrated Systems. All Rights Reserved

Switches symbolizingother Seat-belts buckles

16305

VDD

5

Vref

DigitalControl

Voltage/Currentmeasurement

MLX16305 - Application example 2

Click !

1 / Select channel

3 / Fasten seatbelt 4 / Read Current value

I=30mA

Seatbelt fastened !!!

2 / Read Current value

I=0mA

Seatbelt Not fastened !!!

CONFIDENTIAL AND PROPRIETARY

© Copyright 2004 Melexis Microelectronic Integrated Systems. All Rights Reserved

Known load for

calibration issues

MLX16305 - Application example 3

Good matching between channels :

One channel can be used as reference (e.g. : calibration issues)

16305

VDD

5

Vref

DigitalControl

Voltage/Currentmeasurement

CONFIDENTIAL AND PROPRIETARY

© Copyright 2004 Melexis Microelectronic Integrated Systems. All Rights Reserved

The choice is clear

End