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Bosch Semiconductors

CG912

4 channel pyro fuse driver

Application & Technical Summary

CG912

CG912 provides additional safety function for electrical systems in (H)EVs.

Controlled by the battery management system, CG912 can ignite

up to 4 pyro fuses. The pyro fuses safely disconnect the HV battery

from the vehicle’s electrical system.

Product benefits

  • Driver for up to 4 pyro fuses
  • Differential outputs for highest system performance
  • Power supply for system microcontroller
  • Automated diagnostic routines

5 firing modes

per channel. Selectable for optimum adaption to the pyro fuses

Technical Features

Type
Pyro fuse driver
Package
TQFP128_ePad
Features

  • Enhanced sophisticated safety concept
  • Fully automated diagnosis: Monitoring of voltages (incl. VHx) and overtemperature, SVR diagnosis, CER diagnosis, power stage and squib diagnosis, cross-coupling diagnosis, connector capacitor diagnosis, STB and STG diagnosis
  • 2 independent 7-bit firing current counters per channel (max time: 3.2 ms)
  • PWM controlled GPIO

Firing loops
4 × 5 firing modes (incl. 1.2 A, 1.75 A and LEA)
Interfaces
SPI, 32-bit (3.3 V), K-Line/LIN
VDD typ. [V]
3.3
VVZP typ. [V]
14
VVER typ. [V]
23.75 or 33 (programmable)
Tj min [°C]
-40°C
Tj max [°C]
150°C

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