1.1 Features

◼ Common

3-series to 10-series Cell Fuel Gauge IC (FGIC)

RL78 Ultra Low Power MCU (S3 core)

◼ Memory

Code flash memory: 64KB

Data flash memory (up to 100,000 erase/write cycles): 4KB

SRAM / 4KB

◼ Clock generator

High speed on-chip oscillator: up to 32 MHz

Low speed on-chip oscillator: 15 KHz

AFE on-chip oscillator: 4.19 MHz

AFE low speed on-chip oscillator: 131.072 KHz

◼ General Purpose I/O Ports

Total: 15 pins

CMOS input/output: 6

CMOS input: 2

N-ch open drain input/output [6.5V tolerance]: 2

N-ch open drain input/output [VREG2 tolerance]: 2

High voltage input/output [VCC tolerance]: 3

◼ Serial Interface

CSI (SPI): 1 channel

I2C: 1 channel

UART: 2 channels

Simplified I2C: 1 channel

◼ Timer

MCU 16-bit timer: 5 channels

MCU 12-bit interval timer: 1 channel

AFE timer: 2 channels

- AFE timer A: setting range: 125 msec to 64 sec

- AFE timer B: setting range: 30.52 usec to 2 sec

◼ Embedded A/D converter

AFE 15-bit resolution delta-sigma A/D converter

◼ Current measurement circuit

AFE 18-bit resolution delta-sigma A/D converter

◼ Battery cell voltage and temperature (AN port voltage)

detection circuit

Monitoring over/under voltage and temperature by sigmadelta

A/D converter (AFE) without controlling from MCU

◼ Impedance measurement circuit

Simultaneous measurement of battery voltage and current

◼ Over current detection circuit

Short circuit: 1 filter

Discharge over current: 4 filters

Charge over current: 1 filter

Charge wakeup: 1 filter

Discharge wakeup: 1 filter

◼ Series regulator

3.3 V output (> 20mA)

◼ Charge and Discharge MOSFETs control

Low side N-ch Dual MOSFETs drive circuit embedded

Support individual FET control

◼ Ultra Low Power consumption mode

Power down mode: 1uA

Power down mode with PON timer: 2uA

Sleep mode 1: 25uA (DFET and CFET off)

Sleep mode 2: 40uA (DFET and CFET on)

In Sleep mode 2, enable all H/W protection function

◼ Additional features

Internal Cell Balancing Circuit (>10mA)

Internal Watchdog Timer (MCU)

MCU Runaway Detection Circuit (AFE)

4 Thermistor Sensor Ports with On-chip Pull-up Resistors

Integrated Hardware Diagnostics function

Load detection circuit

Random cell connection tolerant

◼ Voltage and temperature condition

Power supply voltage: VCC = 8.0 to 50V

Operating Ambient Temperature: Ta = -40°C to 85°C

◼ Package information

40pin QFN Package ([Body] 5 mm x 5 mm, 0.4 mm pitch)