CG902 | 8 channel pyro fuse driver

5 Firing modes for optimum adaption to the pyro fuses

CG902 provides additional safety function for electrical systems in (H)EVs. Controlled by the battery management system, CG902 can ignite up to eight pyro fuses.

The pyro fuses safely disconnect the HV battery from the vehicle's electrical system. CG902 can also provide power to the battery management's microcontroller and monitor the microcontroller for proper function.

Benefits

Driver for up to four pyro fuses

High side & low side drivers for highest system safety

Power supply for system microcontroller

Target applications

HV battery safety disconnection in (H)EVs

Pyro fuse activation for HV isolation

Technical Features


Type	Pyro fuse driver
Package	TQFP128_ePad
Features	Power supply capabilities: 3.3 V / 1.3 V (microcontroller, onboard sensors) 5 V (CAN) 6.7 V (peripheral sensors) 23.75 / 33 V (energy reserve & pyro fuse firing) Enhanced sophisticated safety concept Watchdog for microcontroller 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	8
Firing modes	Firing modes programmable by SPI: Static mode I: 1.85 A for 0.7 ms Static mode II: 1.75 A for 0.5 ms Static mode III: 1.2 A for 2 ms Dynamic mode V: 1.75 A for 0.7 ms, automatic extension to 1.2 A for 2.0 ms Dynamic mode VI: 1.5 A for 1.5 ms, automatic extension up to 3.0 ms
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

TQFP128 _ePad (14 × 14 mm²)

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