LTC4162-L 35V/3.2A Multicell Lithium-Ion Step-Down Battery Charger 2 with PowerPath and I C Telemetry FEATURES DESCRIPTION n Li-Ion/Polymer Battery Charger with Termination The LTC 4162-L is an advanced monolithic synchronous n Wide Charging Input Voltage Range: 4.5V to 35V step-down switching battery charger and PowerPath n High Efficiency Synchronous Operation manager that seamlessly manages power distribution n 16-Bit Digital Telemetry System Monitors V , between input sources such as wall adapters, backplanes, BAT I , R , T , T , V , I , V solar panels, etc., and a rechargeable Lithium-Ion/Polymer BAT BAT BAT DIE IN IN OUT n Charges 1-8 Lithium-Ion/Polymer Cells battery. n Input Undervoltage Charge Current Limit Loop A high resolution measurement system provides exten- n Input MPPT for Solar Panel Inputs sive telemetry information for circuit voltages, currents, n Input Current Limit Prioritizes System Load Output battery resistance and temperature which can all be read n Low Loss PowerPath 2 2 back over the I C port. The I C port can also be used to n Instant-On Operation with Discharged or Missing configure many charging parameters including charging Battery voltages and currents, termination algorithms and numer- n JEITA Temperature Controlled Charging ous system status alerts. n Pin Compatible with LiFePO and SLA Versions 4 The LTC4162-L can charge Lithium-Ion cell stacks from 1 cell to 8 cells with as much as 3.2A of charge current. APPLICATIONS The power path topology decouples the output voltage from the battery allowing a portable product to start up n Medical Instruments instantly under very low battery voltage conditions. n USB-C Power Delivery n Industrial Handhelds The LTC4162-L is available in a thermally enhanced 28-pin n Ruggedized Notebooks 4mm 5mm 0.75mm QFN surface mount package. n Tablet Computers All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION 1-8 Cell, 3.2A Step-Down Switching Battery Charger with PowerPath Charging Efficiency vs Input Voltage by Cell Count V V IN OUT 100 7 CELLS 8 CELLS 5 CELLS 6 CELLS 4 CELLS V INFET CLP CLN V IN OUT 95 3 CELLS BATFET 2 CELLS 2 I C SW 90 1 CELL CSP LTC4162-L 85 CSN + BATSENS CELL 80 COUNT NTCBIAS NTC I =2.5A CHARGE 75 T GND 5 10 15 20 25 30 35 INPUT VOLTAGE (V) 4162L TA01b 4162L TA01a Rev A 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LTC4162-L TABLE OF CONTENTS Features ............................................................................................................................ 1 Applications ....................................................................................................................... 1 Typical Application ............................................................................................................... 1 Description......................................................................................................................... 1 Absolute Maximum Ratings ..................................................................................................... 3 Order Information ................................................................................................................. 3 Pin Configuration ................................................................................................................. 3 Electrical Characteristics ........................................................................................................ 4 Typical Performance Characteristics .......................................................................................... 7 Pin Functions .....................................................................................................................10 Block Diagram ....................................................................................................................12 ESD Diagram .....................................................................................................................13 Timing Diagram ..................................................................................................................14 Operation..........................................................................................................................15 Applications Information .......................................................................................................29 Register Descriptions ...........................................................................................................36 Typical Applications .............................................................................................................48 Package Description ............................................................................................................50 Revision History .................................................................................................................51 Typical Application ..............................................................................................................52 Related Parts .....................................................................................................................52 Rev A 2 For more information www.analog.com