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