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Bosch Semiconductors

CG985

4 channel pyro fuse driver

Application & Technical Summary

CG98x

CG985 provides additional safety function for electrical system in (H)EVs. Controlled by the battery managment system, CG985 can ignite up to four pyro fuses. The pyro fuses safely disconnect the HV battery from the vehicle's electrical system.

Product benefits

  • Driver for up to four pyro fuses
  • High side & low side drivers for highest system safety
  • Supports diagnostics

2 firing modes

for optimum adaption to the pyro fuses

Technical Features

Type
Pyro fuse driver
Package
LQFP44
Features

  • Sophisticated safety concept
  • Monitoring of voltages, power stage and firing loop diagnosis, STB and STG diagnosis, squib resistance measurement
  • 4-bit firing current counter per firing loop

Firing loops
4
Firing modes

  • 1.2 A for 2 ms
  • 1.75 A for 0.5 & 1.0 ms

Interface
SPI, 16-bit (3.3 V or 4.9 V)
VDD typ. [V]
3.3 + 4.9
VVZP typ. [V]
14
VVER typ. [V]
25 or 33
Tj min [°C]
-40°C
Tj max [°C]
150°C

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