瑞萨电子 (Renesas Electronics Corporation)
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RAA489250B

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5 Cell Li-ion Battery Front End with I²C Interface & Autonomous Protection

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特性

  • Sleep current: 1.6μA
  • VPACK voltages: 5V to 30V
  • VCELL accuracy (Over Temp): ±10mV
  • IPACK Resolution: 13.16μV
  • Open wires and self-tests
  • Autonomous detection and actions
  • High-side charge FET control
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Functional block diagram of the RAA489250B battery management IC, showing internal architecture and signal flow.
A typical application schematic for the RAA489250B shows its integration in a multi‑cell battery system with connections to cells and external components.
Functional block diagram of the RAA489250B battery management IC, showing internal architecture and signal flow.
A typical application schematic for the RAA489250B shows its integration in a multi‑cell battery system with connections to cells and external components.

描述

The RAA489250B is a 5‑cell battery front end (BFE) optimized for packs with MCU control, combining autonomous protection functions with battery health monitoring. It monitors each cell for overvoltage and undervoltage, pack temperature, and charge and discharge current. Internal self‑tests verify device health, while system checks confirm overall system status.

An I²C interface with optional cyclic redundancy check (CRC) ensures reliable communication with the MCU. A built‑in charge pump drives a high‑side complementary field-effect transistor (CFET), and low idle current consumption of 98 µA extends operational time. The RAA489250B is offered in a compact 32‑pin 4mm × 4mm QFN package for efficient board integration.

产品参数

属性值
Cells Supported (#)5 - 5
Pack Voltage (Op)5 - 30
Cell Balancing FETsInternal
Integrated Current Sense/DetectionLow Side
Charge/Discharge FET ControlCFET
Charge/Discharge FET ArrangementCFET
Charge/Discharge FET LocationHigh Side
IS (mA)0.11
Sleep/Reset Mode Current (µA)4
Stand Alone CapableNo
Internal ADC (bits)12
Daisy ChainNo
GPI+GPIOs (#)1
Qualification LevelStandard
Temp. Range (°C)-40 to +85°C

封装选项

Pkg. TypePkg. Dimensions (mm)Lead Count (#)Pitch (mm)
QFN4.0 x 4.0 x 0.90320.4

产品对比

RAA489250BISL94202RAA489204RAA489206RAA489220RAA489255
Cells Supported5 - 53 - 86 - 144 - 164 - 103 - 5
Cell Balancing FETsInternalExternal (Built-in Drivers)External (Built-in Drivers), Internal (Built-in Drivers)External (Built-in Drivers), Internal (Built-in Drivers)NoneNone
Charge/Discharge FET LocationHigh SideHigh SideN/ABothLow SideN/A
Sleep/Reset Mode Current (µA)413191032
Stand Alone CapableNoState MachineNoNoState MachineNo
Daisy Chain001000

应用

  • Power Tool Battery
  • Small Appliance Battery
  • Cleaner Battery

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