德州仪器 (TI) BQ27Z561-R2 Impedance Track™ 电量监测计解决方案是一个高度集成的高精度单芯电池电量监测计,具有闪存可编程的定制精简指令集 CPU (RISC) 和锂离子和锂聚合物电池组 SHA-256 认证。单节电池包括并联电芯,可提高容量。
BQ27Z561-R2 电量监测计通过 I2C 兼容接口和 HDQ 单线接口进行通信,并具有几个可帮助简化准确电量监测的关键功能。通过集成的温度检测功能(内部和外部选项),可实现系统和电池温度测量。
器件型号(1) | 封装 | 封装尺寸(标称值) |
---|---|---|
BQ27Z561 | DSBGA (12) | 1.67mm × 2.05mm |
BQ27Z561-R2 |
Changes from Revision A (November 2021) to Revision B (November 2022)
Changes from Revision * (February 2020) to Revision A (November 2021)
集成的 SHA-256 功能有助于在系统和电池组之间实现安全识别。借助中断和 BTP 功能,BQ27Z561-R2 器件可在发生特定充电状态 (SOC)、电压或温度故障时通知系统。通过低电压运行,即使在深度放电情况下,系统也能够持续监控电池的状态。在低活跃度情况下,可以将此器件设置为低功耗库伦计数 (CC) 模式,从而在显著减小工作电流的情况下继续进行库伦计数。
PIN | TYPE(1) | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
BAT | D2 | P | Battery voltage measurement input. Kelvin battery sense connection to BAT_SNS. Connect a capacitor (1 µF) between BAT and VSS. Place the capacitor close to the gauge. |
CE | D3 | I | Active-high chip enable |
BAT_SNS | C2 | AI | Battery sense |
INT | A1 | O | Interrupt for voltage, temperature, and state of charge (programmable active high or low) |
PULS | A2 | O | Programmable pulse width with active-high or -low option |
TS | B1 | AI | Temperature input for ADC |
NU | C3 | NC | Makes no external connection |
SCL | B3 | I/O | Serial clock for I2C interface that requires an external pullup when used. It can be left floating if unused. |
SDA/HDQ | A3 | I/O | Serial data for I2C interface and one-wire interface for HDQ (selectable) that requires an external pullup when used. It can be left floating if unused. |
SRP | D1 | I | Analog input pin connected to the internal coulomb counter peripheral for integrating a small voltage between SRP (positive side) and SRN |
SRN | C1 | I | Analog input pin connected to the internal coulomb counter peripheral for integrating a small voltage between SRP (positive side) and SRN |
VSS | B2 | P | Device ground |