LTC1923
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LTC1923

High Efficiency Thermoelectric Cooler Controller

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1ku List Price Starting From $21.51
Features
  • High Efficiency, Low Noise Topology
  • Adjustable Output Slew Rate Reduces EMI
  • Full-Bridge Controller for Bidirectional Current Control
  • Adjustable Pulse-by-Pulse Bidirectional TEC Current Limit
  • Open/Shorted Thermistor Indication
  • Solution Footprint in Less Than 0.6" x 0.8"
    (Double-Sided PCB)
  • Available in 5mm x 5mm QFN and 28-Pin SSOP Packages
  • TEC Voltage Clamping
  • TEC Current, Voltage and Heat/Cool Status Outputs
  • Adjustable/Synchronizable Oscillator Frequency Reduces Filter Component Size and System Noise
  • 2.5V Reference Voltage Output
  • 2.7V Minimum Operating Voltage
Additional Details
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The LTC1923 is a pulse width modulator intended for thermoelectric cooler (TEC) or heater applications requiring either unidirectional or bidirectional drive circuits. All of the necessary control circuitry and two sets of complementary output drivers are integrated into the LTC1923 to drive a full bridge, providing an efficient means of bidirectional current flow to the TEC. An accurate temperature control loop to stabilize the temperature of a laser diode system is easily achieved with the addition of just a few external components. Typical temperature setpoint accuracy of 0.1°C is achievable with the LTC1923. Adding an instrumentation amplifier front end allows setpoint stability of 0.01°C.

The part features independent adjustable heating and cooling pulse-by-pulse current limit, current soft-start for controlled start-up, output slew rate control to reduce system noise, differential current sense and voltage amplifiers and a host of auxiliary circuits to protect the laser and provide redundant system monitoring.

Applications

  • Laser-Based Fiber Optic Links
  • Medical Instruments
  • CPU Temperature Regulators
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Part Models 4
1ku List Price Starting From $21.51
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LTC1923

Documentation

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Data Sheet

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UPDATED 08/22/2007
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LTC1923: High Efficiency Thermoelectric Cooler Controller Data Sheet

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UPDATED 05/28/2005
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LTC1923: 高効率な熱電冷却器コントローラ データシート

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Application Note

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UPDATED 08/20/2007
English
AN89 - A Thermoelectric Cooler Temperature Controller for Fiber Optic Lasers: Climatic Pampering for Temperamental Lasers redirect icon

1.00M

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User Guide

2

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UPDATED 01/21/2014
English
DC388C - Quick Start Guide redirect icon

14.00K

download

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UPDATED 09/24/2009
English
DC491A - Demo Manual redirect icon

475.00K

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Reliability Data

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UPDATED 03/23/2018
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R421 Reliability Data redirect icon

66.89 K

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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
LTC1923EGN#PBF 28-Lead SSOP (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC1923EGN#TRPBF 28-Lead SSOP (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LTC1923EUH#PBF 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LTC1923EUH#TRPBF 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link

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Product Lifecycle

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Aug 10, 2022

- 22_0177

Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

LTC1923EGN#PBF

PRODUCTION

LTC1923EGN#TRPBF

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PCN22_0177_Form

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Material_Report

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Delta Qualification Matrix

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Jan 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC1923EUH#PBF

PRODUCTION

LTC1923EUH#TRPBF

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PCN21_0269_Form

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Detailed Change Description

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Qualification Results Summary

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PCN

Aug 10, 2022

- 22_0177

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Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

LTC1923EGN#PBF

PRODUCTION

LTC1923EGN#TRPBF

PRODUCTION

pdf

PCN22_0177_Form

external-icon

xls

Material_Report

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xlsm

Delta Qualification Matrix

Download
Jan 20, 2022

- 21_0269

arrow down

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC1923EUH#PBF

PRODUCTION

LTC1923EUH#TRPBF

PRODUCTION

pdf

PCN21_0269_Form

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xls

Material_Report

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pdf

Detailed Change Description

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pdf

Qualification Results Summary

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Software & Part Ecosystem

Evaluation Kits 2

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DC388C

LTC1923EGN | TEC Temperature Controller, 2.7-6.0 VIN

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DC388C

LTC1923EGN | TEC Temperature Controller, 2.7-6.0 VIN

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DC388C
LTC1923EGN | TEC Temperature Controller, 2.7-6.0 VIN
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Product Detail

Demonstration circuit DC388 utilizes the LTC1923 thermoelectric cooler (TEC) controller. It provides a complete temperature control solution for TEC based temperature control of fiber-optic lasers. Laser temperature may be controlled at temperatures above or below ambient with set point stability typically well within .05º C over widely varying ambient temperature. Temperature set point is established with a screwdriver driven potentiometer or a 14-bit on-board DAC. Considerably more detail relating to TEC temperature control issues is available in LTC Application Note AN-89, “A Thermoelectric Cooler Temperature Controller for Fiber Optic Lasers.” This publication should be reviewed before demo board results are evaluated.

Resources

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DC388C - Schematic Download

44.00K

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DC388C - Quick Start Guide Download

14.00K

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ZIP

DC388C - Design Files Download

736.00K

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DC491A

LTC1923EUH | TEC Temperature Controller, 1.0MHz Switching Frequency, 2.7-5.5V Input

Evaluation Kits2

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DC388C

LTC1923EGN | TEC Temperature Controller, 2.7-6.0 VIN
evaluation kit item images

DC491A

LTC1923EUH | TEC Temperature Controller, 1.0MHz Switching Frequency, 2.7-5.5V Input

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