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MAX1968

Maxim
Part Number MAX1968
Manufacturer Maxim
Description Power Drivers for Peltier TEC Modules
Published May 6, 2005
Detailed Description MAX1968/MAX1969 EVALUATION KIT AVAILABLE Power Drivers for Peltier TEC Modules General Description The MAX1968/MAX1969...
Datasheet PDF File MAX1968 PDF File

MAX1968
MAX1968


Overview
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.
This arrangement ensures that the control system does not hunt when the set point is very close to the natural operating point, requiring a small amount of heating or cooling.
An analog control signal precisely sets the TEC current.
The MAX1969 provides unipolar output up to 6A.
Reliability is optimized with settable limits for both TEC voltage and current, with independently set limits for heating and cooling current.
An analog output also monitors TEC current.
The MAX1968/MAX1969 are available in a low-profile 28-pin TSSOP-EP package and is specified over the -40°C to +85°C temperature range.
The thermally enhanced TSSOP-EP package with exposed metal pad minimizes operating junction temperature.
An evaluation kit is available to speed designs.
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 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 Referen...


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