QuickView

Technical Documents

Ordering Info

More Information

User Comments (0)

All

Data Sheet

FULL DATA SHEET (PDF, 316kB) Download   E-Mail

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. 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.

Key Features		Applications/Uses
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		Automated Test Equipment (ATE) Biotech Lab Equipment EDFA Optical Amplifiers Fiber Optic Network Equipment Fiber-Optic Laser Modules Telecom Fiber Interfaces WDM, DWDM Laser Diode Temperature Control

Application Notes

Application Note 2931: HFTA-09.0: T3/E3/STS-1 Fiber Optic Extension - MAX1968 Application Note 3318: HFAN-08.2.0: Thermoelectric Cooler (TEC) Control - MAX1968, MAX1969

Evaluation Kits

MAX1968EVKIT

Reliability Reports

Show FIT data for: MAX1968 MAX1969 Reliability Report: MAX1968EUI.pdf Request Reliability Report for: MAX1969

Software/Models

none

Ordering Information
Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices: 1-8 of 8
MAX1968	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1968EUI			TSSOP;28 pin; Dwg: 21-0108 (PDF) Use pkgcode/variation: U28E-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1968EUI-T			TSSOP;28 pin; Dwg: 21-0108 (PDF) Use pkgcode/variation: U28E-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1968EUI+			TSSOP;28 pin; Dwg: 21-0108 (PDF) Use pkgcode/variation: U28E+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1968EUI+T			TSSOP;28 pin; Dwg: 21-0108 (PDF) Use pkgcode/variation: U28E+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1969	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1969EUI			TSSOP;28 pin; Dwg: 21-0108 (PDF) Use pkgcode/variation: U28E-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1969EUI-T				-40°C to +85°C	See data sheet
MAX1969EUI+			TSSOP;28 pin; Dwg: 21-0108 (PDF) Use pkgcode/variation: U28E+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1969EUI+T			TSSOP;28 pin; Dwg: 21-0108 (PDF) Use pkgcode/variation: U28E+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2002-05-21

Didn't Find What You Need?

Next Day Product Selection Assistance from Applications Engineers Parametric Search Applications Help

QuickView

Technical Documents

Ordering Info

More Information

Description   Key Features   Applications/Uses   Key Specifications   Diagram

Data Sheet   Application Notes   Design Guides   Engineering Journals   Reliability Reports   Software/Models   Evaluation Kits

Price and Availability   Samples   Buy Online   Package Information   Lead-Free Information

Related Products   Notes and Comments   Evaluation Kits