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1.1 Features

Fully integrated battery management product including battery capacity measurement and protection.

Supports 2-4 Li-Ion or Li-Polymer battery cells in series.

Ultra-low power Renesas RL78 CPU core

Built-in flash memory (block erase/write protection)

? Flash ROM: 128KB

? Data flash: 4 KB

Internal SRAM: 5.5 KB

Current integrating circuit (18-bit ΔΣA/D)

15-bit ΔΣA/D converter (external 3 channels, internal 5 channels including simple temperature sensor)

High side N-ch FET control circuit for charge and discharge current protection

Overcurrent detection circuit (discharge short-circuit current (2 channels), charge/discharge overcurrent, and wake-up current)

Battery voltage detection circuit (4 cells)

Battery cell conditioning circuit (4 cells)

Pack+ terminal voltage detection circuit

FUSE control circuit

MCU built-in high speed on-chip clock generator

AFE on-chip oscillator clock (4.194 MHz)

MCU runaway detection circuit

MCU build-in watchdog timer

Series regulator (VREG2: 3.3 V, VREG1: 1.8 V)

Reset circuit (VREG2, VREG1 monitoring)

MCU low power modes : HALT and STOP

High speed on-chip clock oscillator

? High speed operation :1 to 32 MHz

? Low speed operation :1 to 8 MHz

I/O port: 12

? CMOS input/output: 6

? CMOS input: 2

? N-ch open drain: 2

? High voltage input: 1

? High voltage output: 1

Serial interface:

? I2C

? UART

? Simplified I2C

MCU 16-bit timer: 5 channels

MCU 12-bit interval timer: 1 channel

AFE timer (setting range: 125 ms to 64 s)

8 bits PWM signal generator

Intel? Dynamic Battery Power Technology support

Impedance measurement circuit

Built-in on-chip debug function

Self programming function support

Power supply voltage: VCC = 4.0 to 25 V

Operation ambient temperature: Ta = -20 to +85°C

Package Information:

Plastic mold QFN (4mm x 4mm x 0.95mm)