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Bosch Semiconductors

CJ945

18-channel low-side power switch

Application & Technical Summary

CJ945

CJ945 provides short-circuiting protection for 18 low-side stages. All channels are controlled either via SPI, micro second channel (MSC) or parallel interface.

  • Control of OUT1 to OUT7 and OUT9 to OUT16 by input pins, μsec-bus or via SPI.
  • Control of OUT8 by input pin IN8 or via SPI.
  • Control of OUT17 and OUT18 via SPI only.
  • Parallel connection of stages is possible.

Product benefits

  • Multiple control interfaces (SPI, MSC, parallel)
  • Extensive diagnostic functions for each output channel: Short circuit to battery, short circuit to ground, open load, overtemperature warning

Protected output stages

Clamping voltage of 70V (typ.) on output 1 to 6, and 45V on output 7 to 18

Technical Features

Type
18-channel low-side power switch
Package
Hiquad64
Features

  • Diagnosis: OL, SCG, SCB and OT
  • 5V monitoring
  • 2nd independent shut down path
  • 2 x lambda probe heater

Outputs

  • 4 x 1.1 A / 780 mΩ / 45 V
  • 6 x 2.2 A /380 mΩ / 45 V
  • 6 x 2.2 A / 400 mΩ / 70 V
  • 2 x 3 A / 280 mΩ / 45 V

Control inputs
TTL/CMOS logic
Interface
SPI, µsec bus
Vbat typ [V]
14
VDD typ. [V]
5
Tj min [°C]
-40°C
Tj max [°C]
150°C

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