BQ79735-Q1
Automotive high-voltage battery pack monitor with voltage and insulation-resistance sensing
BQ79735-Q1
- AEC-Q100 qualified –40°C to +125°C
- Functional safety compliant
- Documentation to aid ISO 26262 system design
- Systematic capability up to ASIL D
- Hardware capability up to ASIL D
- 17 single-ended voltage channels
- High voltage pack, link, charge measurement accuracy update to 0.2%
- Pack and cell sync to 64uS
- 15 GPIO inputs as IO, I2C, SPI, ADC and temp sense
- Dedicated MOSFET switch drive pins
- Intelligent SPI contoller HUB
- Support multiple SPI peripheral devices
- HW pin to trigger contactor drivers and Pyro Fuse drivers
- Stackable and register map compatible with BQ7971x-Q1 cell monitors
The device can be used to measure divided down high voltage nodes in a battery system. It can measure voltage across Fuse, Contactors and check isolation voltage in battery junction box (BJB) system. There are 15 GPIOs/auxiliary inputs that can be used for HV measurements, thermistor measurements and driving relays. There are 4 SW outputs that can be used to drive MOSFET switches in the measurement path. The device can function as a SPI HUB and interface with up to 8 separate SPI devices/groups. The isolated bi-directional daisy chain ports support both capacitor and transformer based isolation. The device can also communicate with MCU over SPI and UART.
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- The functional safety documents are available. Request now
- The failure modes, effects and diagnostic analysis (FMEDA) documents are available. Request now
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | BQ79735-Q1 Pack Voltage and Isolation Resistance Monitor for HV Automotive BMS Applications datasheet | PDF | HTML | 08 Oct 2024 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
BQ7973X-Q1-EVALUATION — BQ7973x-Q1 early evaluation files
Supported products & hardware
Products
Battery monitors & balancers
BQ7973X-Q1-FMEDA — BQ7973x-Q1 FMEDA files
Supported products & hardware
Products
Battery monitors & balancers
BQ7973X-Q1-FUNCTIONAL-SAFETY-DOCS — BQ7973x-Q1 functional safety documents
Supported products & hardware
Products
Battery monitors & balancers
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
HTQFP (PHP) | 48 | Ultra Librarian |
Ordering & quality
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