As a new type of high-energy chemical power source, lithium-ion battery has the characteristics of high capacity, high power, long life, miniaturization, thinness and no pollution. Its superior performance is gradually being recognized and its application field is rapidly expanding.

The battery management system can monitor the voltage/current and temperature of battery cells, monitor the voltage and current of a battery pack made up of multiple battery cells connected in series, balance the voltage between battery cells, and can be networked to transmit data signals to ensure that the battery works efficiently and safely during charging and discharging, extending the battery's service life.

Jnchip (Hong Kong)'s battery management solution is built around a battery management IC that provides a low-power MCU and a high-performance analog front-end (AFE) in a single package, providing development tools to support the development of a safe, reliable and high-performance Li-ion battery management system.

Applications range from basic consumer grade applications such as laptop computers, power tools, cordless vacuum cleaners, electric motorcycles, and power-assisted bicycles, to industrial applications such as communication base stations, electric vehicles, photovoltaic backup power, military equipment, and mineral mining.

Safety control: with multiple fail-safe detection functions for high battery pack safety
Integrated MCU and AFE built-in self-diagnostic functions. Ultra-low power storage mode, over/under voltage protection, over current, over/under temperature protection, FET control during failure, and fuse blowing

Capacity calculation: continuous high precision battery level detection
Delta-sigma analog-to-digital converter optimized for current, voltage and temperature measurements could dynamically adjust remaining charge calculation to cope with aging and degraded batteries. It also have built-in learning capacity calculation, current and voltage calibration function, and battery history saving function

Comprehensive development environment: starter kit with EVB, sample code and user manual for easy evaluation and faster development
Evaluation board: Evaluation of device performance and operating behavior, including E1 connector for easy chip debugging. Sample Code: Available sample program source code for all basic battery management functions. Communication with PC via 12C bus, GUI I/F to display battery parameter status such as voltage, current and temperature

Intersil Battery Front End (BFE) Products

High-cell-count lithium-ion battery management analog front ends

Product Benefits

Ultra-low power mode

Support battery pack hot-swap design

Highly accurate voltage measurement integrated regulator

Adjustable external circuitry

▪RL78 CPU core 
▪ Memory: 
  − On-chip RAM : 7kB − Code flash memory : 128 KB / Block size : 1KB  − Data flash memory : 4 KB 
▪ On-chip debug function
 ▪ Self-programming (with boot swap function/flash shield window function) 
▪ High-speed on-chip oscillator: up to 32MHZ, +/- 1.0% (TA = -20 to +85C) 
▪ Subsystem clock:  32.768kHz
 ▪ Power management and reset function 
  − On-chip power-on-reset (POR) circuit   − On-chip voltage detector (LVD) 

▪ Data transfer controller (DTC) ▪ Serial interfaces 
  − CSI : 2 channels − UART : 2channels − Simplified I2C : 2channels   − I2C : 1channel   − Can interface (RS-CAN lite) : 1channel 
▪ Timer 
  − 16-bit timer : 6 channels  − 12-bit interval timer : 1channel   − Real-time clock : 1channel (calendar for 99 years, alarm function and clock correction function) − Watchdog timer : 1 channel (operate with the dedicated low-speed on-chip oscillator) 
▪ A/D converter 
− 8/10-bit resolution A/D converter with 4 channels & Internal reference voltage (1.45V) and temperature sensor 
▪ - I/O port: 31