TIDA-00052

Stand-Alone Multi-Cell Li-Ion/Li-Polymer Precision Protector Solution

TIDA-00052

Design files

Overview

This reference design consists of a bq77908A circuit module and a resistor cell simulator module, which can be used for simple evaluation of the IC functions used in consumer electronics applications. The reference design includes one bq77908A integrated circuit (IC), sense resistor, power FETs and all other onboard components necessary to protect the cells from overcharge, overdischarge, short circuit, and overcurrent discharge in a 8-series cell Li-Ion or Li-Polymer battery pack. The circuit module connects directly across the cells in a battery. With a compatible interface board and Windows®-based PC software, the user can view the bq77908A registers and program the IC configuration and protection limits.

Features
  • # Series Cells: 4 to 8S
  • Max Input Volts: 35V
  • Max Charge Current: 3A
  • Communication: I2C
  • Automatic cell balancing, Integrated protection
  • Personal computer software available for configuration

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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU116.PDF (2098 KB)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDR089.PDF (64 KB)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDU117.PDF (728 KB)

PCB layer plot file used for generating PCB design layout

TIDR088.PDF (219 KB)

Detailed schematic diagram for design layout and components

Technical documentation

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* Test report TIDA-00052 Test Results Aug 27, 2013

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