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MAX1968 - Power Drivers for Peltier TEC Modules

Description

The MAX1968/MAX1969 are highly integrated and costeffective, high-efficiency, switch-mode drivers for Peltier thermoelectric cooler (TEC) modules.

Both devices utilize direct current control to eliminate current surges in the TEC.

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.
  • Hig.

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Full PDF Text Transcription

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MAX1968/MAX1969 EVALUATION KIT AVAILABLE Power Drivers for Peltier TEC Modules General Description The MAX1968/MAX1969 are highly integrated and costeffective, 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. The MAX1968 operates from a single supply and provides bipolar ±3A output by biasing the TEC between the outputs of two synchronous buck regulators. Bipolar operation allows for temperature control without “dead zones” or other nonlinearities at low load currents.
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