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MAX1968, MAX1969
Peltier TEC 모듈용 전력 드라이버

초소형, EMI 최적화 TEC 컨트롤러, 내부 FET, 0.01°C 온도 제어


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전체 데이터 시트 (PDF, 456kB)
English Download this datasheet in PDF format다운로드
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.

주요기능   애플리케이션/용도
  • 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

 
  • 자동 시험 장비 (ATE)
  • 생명공학 실험실 장비
  • EDFA 광 앰프
  • 광섬유 네트워크 장비
  • 광섬유 레이저 모듈
  • 텔레콤 광 인터페이스
  • WDM, DWDM 레이저 다이오드 온도 제어

    Key Specifications:   Multifunction PMICs
    Part Number Primary Topology Monitor/Control Features DC-DC/Power Features VIN (min) (V) VIN (max) (V) Min. VOUT (V) Max. VOUT (V) IOUT (A) IOUT (A) Operating Freq. (kHz) Package Smallest Available Package (max w/pins) (mm2) Price**
    MAX1968  H-Bridge Output OVP
    Shutdown
    Volt. or PWM Controlled Output
    Adj. Frequency
    Current Limit
    Fixed Freq./PWM
    Internal Pwr. FETs
    Soft Start
    Sync. Rectifier
    TEC Driver
    3 5.5 -4.3 4.3 3 3 1000 TSSOP-EP/28 64 $7.50 @ 1k
    MAX1969  6 6 $9.00 @ 1k
    See All Multifunction PMICs (79)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    다이어그램
    MAX1968, MAX1969: Typical Operating Circuit
    일반 동작 회로

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    문서 레퍼런스 19-2447; 개정판 2; 2007-02-28
    이 페이지는 최근에 변경됨: 2009-05-29


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