General Description

The MAX1968/MAX1969 are highly integrated and cost effective, high-efficiency, switch-mode drivers for Peltier thermoelectric cooler (TEC) modules. Both devices utilize direct current control to eliminate current surges in the TEC. On-chip FETs minimize external components while providing high efficiency. A 500kHz/1MHz switching frequency and a unique ripple cancellation scheme reduce component size and noise.

Benefits and Features

? High Accuracy and Adjustability Improves System

Performance by Optimizing TEC Operation

? Direct Current Control Prevents TEC Current Surges

? Ripple Cancellation for Low Noise

? No Dead-Zone or Hunting at Low-Output Current

? 1 Accurate Voltage Reference

? Adjustable TEC Voltage Limit

? Separately Adjustable Heating and Cooling Current

Limits

? ITEC Output Provides Proportional Voltage to TEC

Current for Monitoring

? High-Efficiency Switch-Mode Design

? On-Chip Power MOSFETs Improve Efficiency While

Reducing External Components

? 500kHz/1MHz Switching Frequency

? Choose from ±3A Output Current (MAX1968) or 6A

Output Current (MAX1969)

? Thermally Enhanced TSSOP-EP Package Minimizes

Operating Junction Temperature

Applications

Fiber Optic Laser Modules

WDM, DWDM Laser Diode Temperature Control

Fiber Optic Network Equipment

EDFA Optical Amplifiers

Telecom Fiber Interfaces

ATE

Biotech Lab Equipment