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High Voltage 2 Amp Monolithic Li-Ion Battery Charger

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LT3650EMSE-4.2#PBF General Description

The LT3650 is a complete monolithic single-cell Li-Ion/Polymer battery charger that operates over a 4.75V to 32V input voltage range (7.5V 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 fl oat 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.

Analog Devices, Inc Inventory

Key Features

  • Wide Input Voltage Range: 4.75V 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
  • No VIN Blocking Diode Required
  • 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
Analog Devices, Inc Original Stock


  • Industrial Handheld Instruments
  • 12V to 24V Automotive and Heavy Equipment
  • Desktop Cradle Chargers
  • Notebook Computers
Analog Devices, Inc Inventory


model LT3650EMSE-4.2#PBF package 12-Lead MSOP w/ EP
packingQty Tube,37 packingOption Tube
packageType 05-08-1666 rohs roHSY
lifeCycle production tempRange -40 to 125C
Manufacturer Analog Devices Inc. Product Category Battery Management
RoHS Details Product Charge Management
Battery Type Lithium-ion, Lithium Polymer Output Voltage 4.2 V
Output Current 2 A Operating Supply Voltage 4.75 V to 32 V
Package / Case MSOP-12 Mounting Style SMD/SMT
Series LT3650-4.1 Brand Analog Devices
Development Kit DC1229B-A, DC1229B-B Product Type Battery Management
Factory Pack Quantity 37 Subcategory PMIC - Power Management ICs
Unit Weight 0.003527 oz

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If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.


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LT3650EMSE-4.2#PBF Datasheet PDF

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