BQ79656-Q1中文资料符合 ASIL-D 标准的汽车类 16 节串联精密电池监控器、平衡器、电流传感器数据手册TI规格书

描述 Description

The BQ7965x-Q1 family of devices provides high-accuracy cell voltage measurements for a minimum of 6S to a maximum of 12S (BQ79652-Q1), 14S (BQ79654-Q1), or 16S (BQ79656-Q1) 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 raring, differential RC filters on the cell input channels. The integrated, post-ADC, low-pass filters enable filtered, DC-like, voltage measurements. This family of devices 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.

The inclusion of the isolated, bidirectional, daisy chain ports supports both capacitor- and transformer-based isolation, allowing the use of the most effective components for centralized or distribution architectures commonly found in the xEV powertrain system. This device also includes eight GPIOs or auxiliary inputs that can be used for external thermistor measurements.

Host communication to the BQ7965x-Q1 family of devices can be connected via the device’s dedicated UART interface or through a communication bridge device, BQ79600. Additionally, an isolated, differential daisy-chain communication interface allows the host to communicate with the entire battery stack over a single interface. In the event of a communication line break, the daisy-chain communication interface is configurable to a ring architecture that allows the host to talk to devices at either end of the stack.

特性 Features

• Qualified for automotive applications
• Device temperature grade 1: –40°C to +125°C ambient operating temperature range
• Device CDM ESD classification level C4B
• Functional Safety-Compliant
• Documentation to aid ISO 26262 system design
• Hardware capability up to ASIL D
• +/- 1.5mV ADC accuracy
• Stackable monitor 16S (BQ79616-Q1, BQ79656-Q1), 14S (BQ79614-Q1, BQ79654-Q1), and 12S (BQ79612-Q1, BQ79652-Q1)
• Supports current-sense measurement
• Highly accurate cell voltage measurements within 128 µs for all cell channels
• Supports bus bar connection and measurement
• Supports internal cell balancing
• Built-in balancing thermal management with automatic pause and resume control
• Isolated differential daisy chain communication with optional ring architecture
• 5 V LDO output to power external digital isolator
• Built-in SPI master