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)