LTC1731-8.X
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LTC1731-8.X

Lithium-Ion Linear Battery Charger Controller

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 8
1ku List Price Starting From $1.89
Features
  • Complete Linear Charger Controller for 2-Cell Lithium-Ion Batteries
  • 1% Voltage Accuracy
  • Programmable Charge Current
  • C/10 Charge Current Detection Output
  • Programmable Charge Termination Timer
  • Space Saving 8-Pin MSOP Package
  • Automatic Sleep Mode When Input Supply is Removed (15µA Battery Drain)
  • Automatic Trickle Charging of Low Voltage Cells
  • Programmable for Constant-Current-Only Mode
Additional Details
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The LTC1731-8.2/LTC1731-8.4 are complete constant-current/constant-voltage linear charger controllers for 2-cell lithium-ion (Li-Ion)batteries. Nickel-cadmium (NiCd) and nickel-metal-hydride (NiMH) batteries can also be charged with constant current using external termination. The external sense resistor sets the charge current with 7% accuracy. An internal resistor divider and precision reference set the final float potential with 1% accuracy. The output float voltages are set internally to 8.2V (LTC1731-8.2) or 8.4V (LTC1731-8.4).

When the input supply is removed, the LTC1731-8.2/LTC1731-8.4 automatically enter a low current sleep mode, dropping the battery drain current to typically 15µA. An internal comparator detects the end-of-charge (C/10) condition while a programmable timer, using an external capacitor, sets the total charge time. Fully discharged cells are automatically trickle charged at 10% of the programmed current until battery voltage exceeds 4.95V.

The LTC1731-8.2/LTC1731-8.4 are available in the 8-pin MSOP and SO packages. For 1-cell Li-Ion battery charging, see the LTC1731-4.1 and LTC1731-4.2 data sheets.


  Float Voltage
LTC1731-4.1
4.1V
LTC1731-4.2
4.2V
LTC1731-8.2
8.2V
 LTC1731-8.4
8.4V

Applications

  • Cellular Phones
  • Handheld Computers
  • Charging Docks and Cradles
  • Programmable Current Source
Part Models 8
1ku List Price Starting From $1.89

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC1731EMS8-8.2#PBF
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LTC1731EMS8-8.2#TRPBF
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LTC1731EMS8-8.4#PBF
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LTC1731EMS8-8.4#TRPBF
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LTC1731ES8-8.2#PBF
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LTC1731ES8-8.2#TRPBF
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LTC1731ES8-8.4#PBF
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LTC1731ES8-8.4#TRPBF
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Product Lifecycle

PCN

Feb 3, 2020

- 20_0128

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LTC1731EMS8-8.2#PBF

PRODUCTION

LTC1731EMS8-8.2#TRPBF

PRODUCTION

LTC1731EMS8-8.4#PBF

PRODUCTION

LTC1731EMS8-8.4#TRPBF

PRODUCTION

Dec 14, 2023

- 22_0255

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

LTC1731ES8-8.2#PBF

PRODUCTION

LTC1731ES8-8.2#TRPBF

PRODUCTION

LTC1731ES8-8.4#PBF

PRODUCTION

LTC1731ES8-8.4#TRPBF

PRODUCTION

Jun 16, 2021

- 21_0026

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LTC1731ES8-8.2#PBF

PRODUCTION

LTC1731ES8-8.2#TRPBF

PRODUCTION

LTC1731ES8-8.4#PBF

PRODUCTION

LTC1731ES8-8.4#TRPBF

PRODUCTION

Filter by Model

reset

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Part Models

Product Lifecycle

PCN

Feb 3, 2020

- 20_0128

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Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LTC1731EMS8-8.2#PBF

PRODUCTION

LTC1731EMS8-8.2#TRPBF

PRODUCTION

LTC1731EMS8-8.4#PBF

PRODUCTION

LTC1731EMS8-8.4#TRPBF

PRODUCTION

Dec 14, 2023

- 22_0255

arrow down

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

LTC1731ES8-8.2#PBF

PRODUCTION

LTC1731ES8-8.2#TRPBF

PRODUCTION

LTC1731ES8-8.4#PBF

PRODUCTION

LTC1731ES8-8.4#TRPBF

PRODUCTION

Jun 16, 2021

- 21_0026

arrow down

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LTC1731ES8-8.2#PBF

PRODUCTION

LTC1731ES8-8.2#TRPBF

PRODUCTION

LTC1731ES8-8.4#PBF

PRODUCTION

LTC1731ES8-8.4#TRPBF

PRODUCTION

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