LT1620
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LT1620

Rail-to-Rail Current Sense Amplifier

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Part Details
Part Models 10
1ku List Price Starting From $2.29
Features
  • Accurate Output Current Programming
  • Usable in Charging Applications Up to 32V Output
  • Programmable Load Current Monitor for End-of-Charging-Cycle Notification (16-Pin Version)
  • Dual Function IC (LT1621) Allows Convenient Integration of Load and Input Current Sensing
  • Level-Shifted Current Sense Output for Current Mode PWM Controllers
  • Can be Used for NiCd, NiMH, Lead-Acid and Lithium-Ion Battery Charging
  • Greater than 96% Efficiency Possible in Charger Applications
  • High Output Currents Possible: > 10A Easily Obtained
Additional Details
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The LT1620 simplifies the design of high performance, controlled current battery charging circuits when used in conjunction with a current mode PWM controller IC.

The LT1620 regulates average output current independent of input and output voltage variations. Output current can be easily adjusted via a programming voltage applied to the LT1620’s PROG pin.

Most current mode PWM controllers have limited output voltage range because of common mode limitations on the current sense inputs. The LT1620 overcomes this restriction by providing a level-shifted current sense signal, allowing a 0V to 32V output voltage range.

The 16-pin version of the LT1620 contains a programmable low charging current flag output. This output flag can be used to signal when a Li-Ion battery charging cycle is nearing completion.

The LT1621 incorporates two fully independent current control circuits for dual loop applications.

Applications

  • High Current Battery Chargers
  • High Output Voltage DC/DC Converters
  • Constant Current Sources
  • Overcurrent Fault Protectors
Part Models 10
1ku List Price Starting From $2.29

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Oct 11, 2022

- 22_0235

Epoxy Change from Henkel 8290 to 8290A for GN Package

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PRODUCTION

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Apr 6, 2022

- 22_0066

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

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Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

Feb 3, 2020

- 20_0128

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

LT1620CMS8#PBF

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LT1620CMS8#TRPBF

PRODUCTION

Dec 14, 2023

- 22_0255

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

LT1620CS8#PBF

PRODUCTION

LT1620CS8#TRPBF

PRODUCTION

LT1620IS8#PBF

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Jun 11, 2021

- 21_0060

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

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PRODUCTION

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Filter by Model

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Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0235

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Epoxy Change from Henkel 8290 to 8290A for GN Package

LT1620CGN#PBF

PRODUCTION

LT1620CGN#TRPBF

PRODUCTION

LT1620IGN#PBF

PRODUCTION

LT1620IGN#TRPBF

PRODUCTION

Apr 6, 2022

- 22_0066

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Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LT1620CGN#PBF

PRODUCTION

LT1620CGN#TRPBF

PRODUCTION

LT1620IGN#PBF

PRODUCTION

LT1620IGN#TRPBF

PRODUCTION

Jun 5, 2024

- 24_0003

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

Feb 3, 2020

- 20_0128

arrow down

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

LT1620CMS8#PBF

PRODUCTION

LT1620CMS8#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)

LT1620CS8#PBF

PRODUCTION

LT1620CS8#TRPBF

PRODUCTION

LT1620IS8#PBF

PRODUCTION

LT1620IS8#TRPBF

PRODUCTION

Jun 11, 2021

- 21_0060

arrow down

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

LT1620CS8#PBF

PRODUCTION

LT1620CS8#TRPBF

PRODUCTION

LT1620IS8#PBF

PRODUCTION

LT1620IS8#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

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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