BQ75614-Q1 Texas instruments

BQ75614-Q1

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BQ75614-Q1

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Описание

The BQ75614-Q1 device provides high-accuracy cell voltage measurements up to 16S battery modules in less than 200 µs while these devices also support shunt-resistor current sense measurement. The integrated front-end filters enable the system to implement with simple, low voltage rated, differential RC filters on the cell input channels. The integrated, post-ADC, low-pass filters enable filtered, DC-like, voltage measurements. This device also supports integrated current sensing capabilities with option to synchronize with cell voltage measurements for better state of charge (SOC) calculation. The device supports autonomous internal cell balancing with temperature monitoring to auto-pause and resume balancing to avoid an overtemperature condition. This device also includes eight GPIOs or auxiliary inputs that can be used for external thermistor measurements.Host communication to the can be connected via the devices dedicated UART interface.

Qualified for automotive applications
AEC-Q100 Qualified with the following results:
- Device temperature grade 1: –40°C to +125°C ambient operating temperature range
- Device HBM ESD classification level 2
- Device CDM ESD classification level C4B
Functional Safety-Compliant
- Developed for functional safety applications
- Documentation to aid ISO 26262 system design
- Systematic capability up to ASIL D
- Hardware capability up to ASIL D
+/- 1.5mV ADC accuracy
Pin-package and software compatible device family:
- Stackable monitor 16S (BQ79616-Q1, BQ79656-Q1), 14S (BQ79614-Q1, BQ79654-Q1), and 12S (BQ79612-Q1, BQ79652-Q1)
- Standalone monitor 48 V system (BQ75614-Q1)
Supports current-sense measurement
Direct support on fuse and relay open and close diagnostics
Built-in redundancy path for voltage and temperature and current diagnostics
Highly accurate cell voltage measurements within 128 µs for all cell channels
Integrated post-ADC configurable digital low-pass filters
Built-in host-controlled hardware reset to emulate POR-like device reset
Supports internal cell balancing
- Balancing current at 240 mA
- Built-in balancing thermal management with automatic pause and resume control
5 V LDO output to power external digital isolator
UART host interface
Built-in SPI master

Number of series cells (min)	6
Vin (max) (V)	80
Features	Cell balancing, Integrated ADC, Multi-cell support, Open-wire detection, Overtemperature protection, Overvoltage protection, Separate MCU requirement, Stackable (built-in interface), Temperature sensing, Undertemperature protection, Undervoltage protection
Device type	Cell monitor and balancer
Number of series cells (max)	14
Operating temperature range (°C)	-40 to 125
Rating	Automotive
Battery overvoltage protection (min) (V)	2.7
Battery overvoltage protection (max) (V)	4.5
TI functional safety category	Functional Safety-Compliant
Communication interface	UART
Operating current (typ) (µA)	9000