LTC4156

RECOMMENDED FOR NEW DESIGNS

Dual-Input Power Manager/3.5A LiFePO₄ Battery Charger with I²C Control and USB OTG

Part Models: 4
1ku List Price: Starting From $3.54

Viewing:

Overview

High Efficiency Charger Capable of 3.5A Charge Current
Charge Control Algorithm Specifically Designed for LiFePO₄ Batteries (Lithium Iron Phosphate)
Monolithic Switching Regulator Makes Optimal Use of Limited Power and Thermal Budget
Dual Input Overvoltage Protection Controller
Priority Multiplexing for Multiple Inputs
I²C/SMBus Control and Status Feedback
NTC Thermistor ADC for Temperature Dependent Charge Algorithms (JEITA)
Instant-On Operation with Low Battery
Battery Ideal Diode Controller for Power Management
USB On-The-Go Power Delivery to the USB Port
Four Float Voltage Settings (3.45V, 3.55V, 3.6V, 3.8V)
28-Lead 4mm × 5mm QFN Package

The LTC4156 is a 15 watt I2C controlled power manager with PowerPath^™ instant-on operation, high efficiency switching battery charging and USB compatibility. The LTC4156 seamlessly manages power distribution from two 5V sources, such as a USB port and a wall adapter, to a single-cell rechargeable lithium iron phosphate battery and a system load.

The LTC4156’s switching battery charger automatically limits its input current for USB compatibility, or may draw up to 3A from a high power wall adapter. The high efficiency step-down switching charger is designed to provide maximum power to the application and reduced heat in high power density applications.

I²C adjustability of input current, charge current, battery float voltage, charge termination, and many other parameters allows maximum flexibility. I²C status reporting of key system and charge parameters facilitates intelligent control decisions. USB On-The-Go support provides 5V power back to the USB port without any additional components. A dual-input, priority multiplexing, overvoltage protection circuit guards the LTC4156 from high voltage damage on the V_BUS pin.

The LTC4156 is available in the low profile (0.75mm) 28-lead 4mm × 5mm QFN surface mount package.

Applications

Portable Medical Devices
Portable Industrial Devices
Backup Devices

Part Models: 4
1ku List Price: Starting From $3.54

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC4156EUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4156EUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4156IUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4156IUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LTC4156EUFD#PBF	PRODUCTION
LTC4156EUFD#TRPBF	PRODUCTION
LTC4156IUFD#PBF	PRODUCTION
LTC4156IUFD#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
Circuit Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Interface Transceivers 1
LTM2884	PRODUCTION	Isolated USB Transceiver with Isolated Power
Protection Switches & Controllers 2
LTC4362-1 LTC4362-2		1.2A Overvoltage/Overcurrent Protector
LTC2955	RECOMMENDED FOR NEW DESIGNS	Pushbutton On/Off Controller with Automatic Turn-On

Temperature Sensors 1
LTC2991	RECOMMENDED FOR NEW DESIGNS	Octal I²C Voltage, Current, and Temperature Monitor

Parts	Product Life Cycle	Description
LTC4155	RECOMMENDED FOR NEW DESIGNS	Dual Input Power Manager/ 3.5A Li-Ion Battery Charger with I²C Control and USB OTG

Evaluation Kits

LTC4156EUFD Demo Board | Dual Input Power Mgr/3.5A LiFePO4 Charger, VIN = 4.35V to 5.5V, VOUT = 4.5V @ 3.5A; DC590B Demo Board is required

Buy Now View Details

Product Details

Demonstration Circuit 1674A-B is dual input power manager/3.5A LiFePO4 battery charger with I²C control and USB On-The-Go (OTG) featuring the LTC4156EUFD. Most functions on the LTC4156 are controlled via the I2C serial interface. The LTC4156 also provides extensive status information via the I²C interface. The DC1674A-B's working input voltage range is 4.35V to 5.5V on both the WALL and USB input. The DC1674A-B will tolerate non-operating overvoltage inputs up to 27V. It utilizes the DC590B (USB-to-I²C interface board) to control the LTC4156 and to read back the contents of the command and status registers.