MAX1968EUI+

Overview

The MAX1968EUI+ is a highly integrated, high-efficiency switching driver designed for Peltier thermoelectric cooler (TEC) modules. It operates on a single supply voltage ranging from 3V to 5.5V and features a 28-TSSOP package with an exposed pad for enhanced thermal performance. The device provides a bipolar output of ±3A by connecting the TEC between two synchronous buck regulator outputs, enabling dead-zone-free temperature control. It incorporates direct current control to eliminate inrush currents and utilizes a unique ripple elimination circuit to reduce component size and power noise.

Feature Summary

• Direct current control prevents TEC inrush currents
• Unique ripple elimination circuit reduces power noise
• Bipolar operation eliminates dead zones at light loads
• Integrated power MOSFETs improve efficiency

Applications

• Automatic Test Equipment (ATE)
• Biotechnology laboratory equipment
• EDFA optical amplifiers
• WDM/DWDM laser diode temperature control

Procurement Notes

Verify the specific suffix EUI against the manufacturer's official datasheet to confirm the 28-TSSOP-EP package and -40°C to +85°C operating range. Confirm active status and lead times directly with Analog Devices or authorized distributors, as availability may vary by region. Ensure the application requires bipolar TEC drive capabilities matching this part's ±3A specification.

Selection Notes

Select this component when bipolar temperature control without dead zones is required for TEC modules. It is suitable for applications needing direct current regulation to prevent inrush currents. Consider the 28-TSSOP-EP package for thermal management needs. Verify that the input voltage range of 3V to 5.5V aligns with the system power supply constraints.

Part Context

The MAX1968 belongs to a family of high-efficiency switching drivers for thermoelectric coolers. Unlike unipolar alternatives, it offers bipolar output capability by utilizing two synchronous buck converters. This design allows for precise analog control of TEC current, improving system stability near ambient temperatures compared to standard heating-only or cooling-only drivers.

Replacement Considerations

The MAX1969 is a related part offering up to 6A unipolar output. Verify if bipolar operation is strictly necessary; if not, the MAX1969 may provide higher current capacity. No other direct cross-model substitutes are confirmed in public documentation.