Datasheet LTC4162-F (Analog Devices)

LTC4162-F 35V/3.2A Multicell LiFePO4 Step-Down Battery Charger with PowerPath and I2C Telemetry
FEATURES DESCRIPTION
n
LiFePO4 Battery Charger with Termination
The LTC®4162-F 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 VBAT,
between input sources such as wall adapters, backplanes,
IBAT, RBAT, TBAT, TDIE, VIN, IIN, VOUT
solar panels, etc., and a rechargeable lithium iron phos- n
Charges 1-9 Lithium Iron Phosphate Cells
phate 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™ back over the I2C port. The I2C 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 Li-Ion and SLA Versions The LTC4162-F can charge LiFePO4 cell stacks from 1 cell to 9 cells with as much as 3.2A of charge current.
APPLICATIONS
The power path topology decouples the output voltage n from the battery allowing a portable product to start up Medical Instruments n instantly under very low battery voltage conditions. USB-C Power Delivery n Industrial Handhelds The LTC4162-F is available in a thermally enhanced 28- n Ruggedized Notebooks pin 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 1-9 Cell, 3.2A Step-Down Switching Battery Charger with PowerPath Charging Efficiency vs Input Voltage by Cell Count
VIN VOUT 100 C I HARGE  = 2.5A VIN INFET CLP CLN VOUT BATFET 95 I2C SW 90 CSP LTC4162-F 85 CSN EFFICIENCY (%) 1 CELL CELL BATSENS+ 2 CELLS COUNT NTCBIAS 80 3 CELLS 4 CELLS 7 CELLS NTC 5 CELLS 8 CELLS 6 CELLS 9 CELLS GND T 75 5 10 15 20 25 30 35 INPUT VOLTAGE (V) 4162F TA01a 4162F TA01b Rev A Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram ESD Diagram Timing Diagram Operation Applications Information Register Descriptions Typical Applications Package Description Revision History Typical Application Related Parts