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.

FEATUREs
♦ Direct Current Control Prevents TEC Current
   Surges
♦ On-Chip Power MOSFETs
♦ High-Efficiency Switch-Mode Design
♦ Ripple Cancellation for Low Noise
♦ No Dead-Zone or Hunting at Low-Output Current
♦ Adjustable TEC Voltage Limit
♦ Separately Adjustable Heating and Cooling
   Current Limits
♦ ITEC Output Monitors TEC Current
♦ 1% Accurate Voltage Reference
♦ 500kHz/1MHz Switching Frequency
♦ ±3A Output Current (MAX1968)
♦ 6A Output Current (MAX1969)
♦ Thermally Enhanced TSSOP-EP Package

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