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ISL94202

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Standalone 3 to 8 Cell Li-Ion Battery Pack Monitor

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Overview

The ISL94202 is a battery pack monitor IC that supports from three to eight series connected cells. It provides complete battery monitoring and pack control. The ISL94202 provides automatic shutdown and recovery from out-of-bounds conditions and automatically controls pack cell balancing. The ISL94202 is highly configurable as a stand-alone unit, but can be used with an optional external Microcontroller (MCU), which communicates to the ISL94202 through an I2C interface. The ISL94202 supersedes the ISL94203 for all future designs, as the ISL94202 operates in both parallel and series power FET configurations.

ISL94202 Functional Diagram
ISL94202 Functional Diagram
  • Eight cell voltage monitors support Li-ion CoO2, Li-ion Mn2O4, Li-ion FePO4, and other chemistries
  • Stand-alone pack control - no MCU needed
  • Multiple voltage protection options (each programmable to 4.8V; 12-bit digital value) and selectable overcurrent protection levels
  • Programmable detection/recovery times for overvoltage, undervoltage, overcurrent, and short-circuit conditions
  • Configuration/calibration registers maintained in EEPROM
  • Open Wire battery connection detection
  • Integrated charge/discharge FET drive circuitry with built-in charge pump supports high-side N-channel FETs
  • Cell balancing uses external FETs with internal state machine or an optional external MCU
  • Enters low power states after periods of inactivity
    • Charge or discharge current detection resumes normal scan rates

Documentation

Featured Documentation
Type Title Date
Datasheet
ISL94202 Datasheet
PDF 1.86 MB
Application Note
R16AN0049EU: Importance of Grounding in Battery Management Systems
PDF 245 KB
Guide
BFE Family Functional Safety Manual
PDF 615 KB
Application Note
ISL94202 Sleep Mode Requirements
PDF 609 KB
Brochure
Battery Management Solutions Brochure
PDF 1.11 MB
White Paper
Putting Safety into Li-ion Battery Packs
PDF 451 KB 简体中文
White Paper
Battery Management System Tutorial
PDF 451 KB 简体中文
Application Note
AN1681: Grounding Techniques
PDF 509 KB
Application Note
AN1684: Nonideality of Ground
PDF 397 KB
9 items

Design & Development

isl94202evkit1z-top.jpg
Evaluation
ISL94202EVKIT1Z Active

Series Charge/Discharge Path 3-to-8 Cell Li-ion Battery Pack Monitor Evaluation Kit

The ISL94202EVKIT1Z is an evaluation kit that facilitates testing of the ISL94202 Li-ion battery pack monitor and control IC. The evaluation kit contains:

  • ISL94202EVAL1Z evaluation board
  • MCB_PS_Z multi-cell power supply test board
  • ISL94202INTFACEKIT1Z USB to I2C interface kit includes a...
Recommended Documents:
ISL94202EVKIT1Z Evaluation Kit Manual
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Demonstration
VACUUM-CLEANER-REF Active

Vacuum Cleaner Reference Design

This Handy Vacuum Cleaner reference design enables switching between two operation levels of suction power: high or low. The sensorless 3-phase BLDC motor is rotated at high speed to provide the appropriate strength of suction for each level. The battery-driven, cordless operation makes...

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.

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Support Communities

  1. ISL94202

    DEAR GROUP MEMBERS,  My name is Babu Vishwanath and I am currently doing my masters degree in battery technologies. Its a great pleasure to be a part of this group.  I would like to clarify one doubt regarding an IC ISL94202,  Will this IC be useful for 4s cells battery ...

    Mar 10, 2022
  2. ISL94202 Load Monitoring Power-On Reset

    Hi,I've built a system around the ISL94202 that has an integrated battery pack (the cells/BMS circuit are not removeable once assembled). The first time the device is assembled it works okay because the batteries are connected to the BMS prior to any load being attached.However ...

    Jul 17, 2024
  3. isl94202 not transitioning properly from Low Voltage Charge Level LVCL

    HI: I want to use the Pre-Charge FET when any cell voltage falls below 3.2 volts. I have enabled the PCFET bit in register x4A and set the low voltage cell level (LVCL) value in x0E & x0F to 3.2 volts (xAA0A).  When any cell voltage is ...

    May 15, 2020
View All Results from Support Communities (25)

FAQs

  1. Can the ISL94202 continue to balance during an overvoltage condition?

    Question: Is there a way to program the ISL94202 (not via an external µc) to do the following: - open the CFET during the balancing - and/or continue to balance during an overvoltage condition   Answer: It is not possible to continue balancing in an overvoltage condition without the charger connected ...

    Jan 1, 1970
  2. Can I use the ISL94202 without a PCFET?

    Question:Can I use the ISL94202 without a PCFET (Pre-Charge FET)?   Answer:Yes, but if the PCFET is not used the PCFET drive pin should be left open.   Go to Japanese

    Jan 1, 1970
  3. Why does the datasheet show both N-channel and P-channel MOSFETs in the ISL94202 cell balancing circuit?

    Question:Your datasheet shows N-channel and P-channel MOSFETs in the ISL94202 cell balancing circuit. Is this a mistake?  Answer:The charge pump is used to drive the main charge and discharge power control FETs. These are N-channel devices that are not shown in the figures listed. The ...

    Jan 1, 1970
View All Results from FAQs (9)