NOT RECOMMENDED FOR NEW DESIGNS USE DROP IN REPLACEMENT ISL94202. EXISTING CUSTOMERS WILL CONTINUE TO RECEIVE SUPPORT ISL94203 Table of Contents Ordering Information 4 Pin Configuration 4 Pin Descriptions . 5 Block Diagram 7 Absolute Maximum Ratings . 8 Thermal Information . 8 Recommended Operating Conditions 8 Electrical Specifications . 8 Symbol Table . 16 Timing Diagrams . 16 External Temperature Configuration 16 Wake-Up Timing 16 Power-Up Timing 17 Change in FET Control 17 Automatic Temperature Scan . 18 Serial Interface Timing Diagrams 18 Discharge Overcurrent/Short-Circuit Monitor . 19 Charge Overcurrent Monitor . 19 Functional Description 20 Battery Connections 20 Power Path . 20 Pack Configuration 20 Battery Cell Connections 20 Operating Modes . 21 Power-Up Operation 21 Wake-Up Circuit . 23 Low Power States . 23 Typical Operating Conditions . 24 Cell Fail Detection 24 Open-Wire Detection 25 Current and Voltage Monitoring 27 Current Monitor . 27 Current Sense . 27 Overcurrent and Short-Circuit Detection . 28 Overcurrent and Short-Circuit Response (Discharge) 29 Overcurrent Response (Charge) 29 Microcontroller Overcurrent FET Control Protection . 30 Voltage, Temperature and Current Scan 31 Cell Voltage Monitoring . 32 Overvoltage Detection/Response 33 Undervoltage Detection/Response . 34 Temperature Monitoring/Response 35 Microcontroller Read of Voltages 37 Voltage Conversions . 37 Microcontroller FET Control 38 Cell Balance . 38 C Control of Cell Balance FETs 40 Cell Balance FET Drive . 41 Watchdog Timer 42 Power FET Drive 42 General I/Os . 42 Higher Voltage Microcontrollers 42 FN7626 Rev.6.00 Page 2 of 65 Apr 26, 2019