LTC1734
Info: : PRODUCTION
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LTC1734

Lithium-Ion Linear Battery Charger in ThinSOT

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $1.56
Features
  • Low Profile (1mm) ThinSOT
  • No Blocking Diode Required
  • No Sense Resistor Required
  • 1% Accurate Preset Voltages: 4.1V or 4.2V
  • Charge Current Monitor Output
    for Charge Termination
  • Programmable Charge Current: 200mA to 700mA
  • Automatic Sleep Mode with Input Supply Removal
  • Manual Shutdown
  • Negligible Battery Drain Current in Shutdown
  • Undervoltage Lockout
  • Self Protection for Overcurrent/Overtemperature
Additional Details
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The LTC1734 is a low cost, single cell, constant-current/constant-voltage Li-Ion battery charger controller. When combined with a few external components, the SOT-23 package forms a very small, low cost charger for single cell lithium-ion batteries.

The LTC1734 is available in 4.1V and 4.2V versions with 1% accuracy. Constant current is programmed using a single external resistor between the PROG pin and ground. Manual shutdown is accomplished by floating the program resistor while removing input power automatically puts the LT1734 into sleep mode. Both the shutdown and sleep modes drain near zero current from battery.

Charge current can be monitored via the voltage on the PROG pin allowing a microcontroller or ADC to read the current and determine when to terminate the charge cycle. The output driver is both current limited and thermally protected to prevent the LTC1734 from operating outside of safe limits. No external blocking diode is required.

The LTC1734 can also function as a general purpose current source or as a current source for charging nickel-cadmium (NiCd) and nickel-metal-hydride (NiMH) batteries using external termination.


Charge Current Vfloat
LTC1734 180mA to 700mA 4.1V or 4.2V
LTC1734L 50mA to 180mA 4.2V

Applications

  • Cellular Telephones
  • Handheld Computers
  • Digital Cameras
  • Charging Docks and Cradles
  • Low Cost and Small Size Chargers
  • Programmable Current Source

Part Models 4
1ku List Price Starting From $1.56

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC1734ES6-4.1#TRMPBF
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LTC1734ES6-4.1#TRPBF
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LTC1734ES6-4.2#TRMPBF
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LTC1734ES6-4.2#TRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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DC370A-B

LTC1734ES6-4.2 | Li-Ion Battery Charger

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DC370A-A

LTC1734ES6-4.1 | Li-Ion Battery Charger

Tools & Simulations

Tools & Simulations 1

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.

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