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瑞萨电子 汽车BMS ISL78693 单芯 LiFePO5 电池充电器

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性能描述

瑞萨电子的汽车级 (AEC-Q100) 锂离子电池管理解决方案 (BMS) 专为满足新一代电动汽车应用的严格安全性、可靠性和性能要求而设计。

我们的电池平衡和安全产品组合采用高度集成的 ISL78714、ISL78600 和 ISL78610 锂电池管理系统和安全监控 IC,具有众多优势,并显著减少混合动力、插电式混合动力及电动车 (HEV/PHEV/EV) 电池组及其相关系统的总体电池管理成本。

瑞萨电子还提供 ISL78692 和 ISL78693 汽车级单芯电池充电器,可延长车载紧急呼叫(eCall)系统中使用的锂离子 (Li-ion)、锂聚合物 (Li-polymer) 和磷酸铁锂(LiFePO4)电池续航时间。

ISL78692 是一款汽车级集成式单芯锂离子或锂聚合物电池充电器,可在输入电压低至 2.65V(冷启动)的情况下进行操作。

  • 参数说明

OVERVIEW

The ISL78692 is an integrated single-cell Li-ion or Li-polymer battery charger capable of operating with an input voltage as low as 2.65V (cold crank case). This charger is designed to work with various types of AC adapters or a USB port.

The ISL78692 operates as a linear charger when the AC adapter is a voltage source. The battery is charged in a CC/CV (constant current/constant voltage) profile. The charge current is programmable with an external resistor up to 1A. The ISL78692 can also work with a current-limited adapter to minimize the thermal dissipation.

The ISL78692 features charge current thermal foldback to guarantee safe operation when the printed circuit board’s thermal dissipation is limited due to space constraints. Additional features include preconditioning of an over-discharged battery, an NTC thermistor interface for charging the battery in a safe temperature range and automatic recharge. The device is specified for operation in ambient temperatures from -40°C to +85°C and is offered in a 3x3mm thermally enhanced DFN package.

KEY FEATURES

  • Complete charger for single-cell Lithium chemistry batteries
  • Integrated power transistor and current sensor
  • Reverse battery leakage 700nA
  • 1% initial voltage accuracy
  • Programmable CC current up to 1A
  • Charge current thermal foldback
  • NTC thermistor interface for battery temperature alert
  • Accepts CV and CC types of adapters or USB bus power
  • Preconditioning trickle charge
  • Guaranteed to operate down to 2.65V after start-up
  • Ambient temperature range: -40°C to +85°C
  • AEC-Q100 qualified

BLOCK DIAGRAM

系统模块图
系统模块图

PARAMETRICS

Parameters ISL78692
Basic Information
生产状态 Mass Production
输出电压典型值 (V) 4.1
电压精度 (%) 1
VIN1 (最大值) (V) 7
输出电流1最大值 (A) 1.6
安全定时器 Yes
自终止 Yes
接受CC适配器 Yes
VIN1涓流充电 (最小值) (% CC) 10
热调节 Yes
功能 Enable, Charge Status, Fault Indication, NTC Input, Timeout Disable, Programmable IMIN, Reference Voltage
电池化学物品 Single Cell Li+/Polymer
资质级别 Automotive
CAN 采样 YES
温度范围 -40℃ to +85℃
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