LT3650-8.X

PRODUCTION

High Voltage 2 Amp Monolithic 2-Cell Li-Ion Battery Charger

Part Models: 16
1ku List Price: Starting From $3.37

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Overview

Wide Input Voltage Range: 9V to 32V (40V Absolute Maximum)
Programmable Charge Current: Up to 2A
User-Selectable Termination: C/10 or Onboard Termination Timer
Dynamic Charge Rate Programming/Soft-Start Pin
Programmable Input Current Limit
1MHz Fixed Frequency
Average Current Mode Control

0.5% Float Voltage Accuracy
5% Charge Current Accuracy
2.5% C/10 Detection Accuracy
NTC Resistor Temperature Monitor
Auto-Recharge at 97.5% Float Voltage
Auto-Precondition at <70% Float Voltage
Bad Battery Detection with Auto-Reset
Binary Coded Open-Collector Status Pins
3mm × 3mm DFN-12 or MSOP-12 Package

The LT3650 is a complete monolithic 2-cell Li-Ion/Polymer battery charger that operates over a 9V to 32V input voltage range (11.5V minimum start-up voltage). The LT3650 provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A, set using an external current sense resistor. A precondition feature trickle-charges a low voltage battery, and bad-battery detection provides a signal and suspends charging if a battery does not respond to preconditioning.

The LT3650 can be configured to terminate charging when charge current falls to C/10, or one-tenth the programmed maximum current. Once charging is terminated, the LT3650 enters a low current (85μA) standby mode. An auto-restart feature starts a new charging cycle if the battery voltage drops 2.5% from the float voltage, or if a new battery is inserted into a charging system.

The LT3650 contains a user-programmable internal safety timer (typically set to a three hour full cycle time). The IC can be configured to use this internal timer if a time-based termination scheme is desired in which charging can continue below C/10 until a desired time is reached.

The LT3650 is available in a low profile (0.75mm) 3mm × 3mm 12-pin DFN and 12-pin MSOP packages.


	Float Voltage
LT3650-4.1	4.1V
LT3650-4.2	4.2V
LT3650-8.2	8.2V
LT3650-8.4	8.4V

Applications

Industrial Handheld Instruments
12V to 24V Automotive and Heavy Equipment
Desktop Cradle Chargers
Notebook Computers

Part Models: 16
1ku List Price: Starting From $3.37

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
LT3650EDD-8.2#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650EDD-8.2#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650EDD-8.4#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650EDD-8.4#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650EMSE-8.2#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650EMSE-8.2#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650EMSE-8.4#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650EMSE-8.4#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650IDD-8.2#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650IDD-8.2#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650IDD-8.4#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650IDD-8.4#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650IMSE-8.2#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650IMSE-8.2#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650IMSE-8.4#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3650IMSE-8.4#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LT3650EDD-8.2#PBF	PRODUCTION
LT3650EDD-8.2#TRPBF	PRODUCTION
LT3650EMSE-8.2#PBF	PRODUCTION
LT3650EMSE-8.2#TRPBF	PRODUCTION
LT3650EMSE-8.4#PBF	PRODUCTION
LT3650EMSE-8.4#TRPBF	PRODUCTION
LT3650IDD-8.2#PBF	PRODUCTION
LT3650IDD-8.2#TRPBF	PRODUCTION
LT3650IDD-8.4#PBF	PRODUCTION
LT3650IDD-8.4#TRPBF	PRODUCTION
LT3650IMSE-8.2#PBF	PRODUCTION
LT3650IMSE-8.2#TRPBF	PRODUCTION
LT3650IMSE-8.4#PBF	PRODUCTION
LT3650IMSE-8.4#TRPBF	PRODUCTION
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LT3650EDD-8.4#PBF	PRODUCTION
LT3650EDD-8.4#TRPBF	PRODUCTION
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT3650EMSE-8.2#PBF	PRODUCTION
LT3650EMSE-8.2#TRPBF	PRODUCTION
LT3650EMSE-8.4#PBF	PRODUCTION
LT3650EMSE-8.4#TRPBF	PRODUCTION
LT3650IMSE-8.2#PBF	PRODUCTION
LT3650IMSE-8.2#TRPBF	PRODUCTION
LT3650IMSE-8.4#PBF	PRODUCTION
LT3650IMSE-8.4#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0129 Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0129_Form Material_Report
LT3650EMSE-8.2#PBF	PRODUCTION
LT3650EMSE-8.2#TRPBF	PRODUCTION
LT3650EMSE-8.4#PBF	PRODUCTION
LT3650EMSE-8.4#TRPBF	PRODUCTION
LT3650IMSE-8.2#PBF	PRODUCTION
LT3650IMSE-8.2#TRPBF	PRODUCTION
LT3650IMSE-8.4#PBF	PRODUCTION
LT3650IMSE-8.4#TRPBF	PRODUCTION

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Battery Charger ICs 2
LT3652HV	RECOMMENDED FOR NEW DESIGNS	Power Tracking 2A Battery Charger
LTM8061	RECOMMENDED FOR NEW DESIGNS	32V, 2A μModule (Power Module) Li-Ion/Polymer Battery Charger
Battery Monitors & Fuel Gauges 2
LTC4150	PRODUCTION	Coulomb Counter/Battery Gas Gauge
LTC2943	NOT RECOMMENDED FOR NEW DESIGNS	Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement

Protection Switches & Controllers 1
LTC4365	RECOMMENDED FOR NEW DESIGNS	Overvoltage, Undervoltage and Reverse Supply Protection Controller

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT3650-4.1
LT3650-4.2
LT3650-8.2
LT3650-8.4

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.