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MAXIM MAX6643LBFAEE+ product image
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MAXIM MAX6643LBFAEE+RoHS

Manufacturer
MAXIM
MPN
MAX6643LBFAEE+
LCSC Part #
C1519401
Packaging
QSOP-16-150mil
Customer #
Key Attributes
Automatic PwM Fan-Speed Controllers with Overtemperature Output
Datasheetpdf iconMAXIM MAX6643LBFAEE+
In-Stock: 1
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QtyUnit PriceTotal Amount
1+$ 6.0752$ 5.4070$ 5.41
10+$ 5.9389$ 5.2857$ 52.86
30+$ 5.8464$ 5.2033$ 156.10
100+$ 5.7555$ 5.1224$ 512.24
Standard Packaging100/Full Tube
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Thermal Management
ManufacturerMAXIM
PackagingQSOP-16-150mil
Resolution (Bits)-
Voltage - Supply3V~5.5V
Operating Temperature-40℃~+125℃
Standby Current-
Temperature Conversion Time125ms
FeaturesMulti-channel temperature sensing;Temperature threshold monitoring
Interface Type-
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging100
Sales UnitPiece

Introduction

AI Translation

The MAX6643/MAX6644/MAX6645 monitor temperature and automatically adjust fan speed to ensure optimum cooling while minimizing acoustic noise from the fan. Each device measures two temperature locations. The MAX6643/MAX6644/MAX6645 generate a PWM waveform that drives an external power transistor, which in turn modulates the fan's power supply. The MAX6643/MAX6644/MAX6645 monitor temperature and adjust the duty cycle of the PwM output waveform to control the fan's speed according to the cooling needs of the system. The MAX6643 monitors its own die temperature and an optional external transistor's temperature, while the MAX6644 and MAX6645 each monitor the temperatures of one or two external diode- connected transistors. The MAX6643 and MAX6644 have nine selectable trip temperatures (in 5℃ increments). The MAX6645 is factory programmed and is not pin selectable. All versions include an overtemperature output (OT(overline)). OT can be used for warning or system shutdown. The MAX6643 also features a FULLSPD input that forces the PwM duty cycle to 100%. The MAX6643/MAX6644/ MAX6645 also feature a FANFAUE output that indicates a failed fan. The MAX6643 and MAX6644 are available in a small 16- pin QSOP package and the MAX6645 is available in a 10- pin μMAX package. All versions operate from 3.0V to 5.5V supply voltages and consume 500μA (typ) supply current.

Features

AI Translation
  • Simple, Automatic Fan- Speed Control
  • Internal and External Temperature Sensing
  • Detect Fan Failure Through Locked- Rotor Output, Tachometer Output, or Fan- Supply Current Sensing
  • Multiple, 1.6% Output Duty- Cycle Steps for Low Audibility of Fan- Speed Changes
  • Pin- Selectable or Factory- Selectable Low- Temperature Fan Threshold
  • Pin- Selectable or Factory- Selectable High- Temperature Fan Threshold
  • Spin- Up Time Ensures Fan Start
  • Fan- Start Delay Minimizes Power- Supply Load at Power- Up
  • 32Hz PWM Output
  • Controlled Duty- Cycle Rate- of- Change Ensures Good Acoustic Performance
  • 2℃ Temperature- Measurement Accuracy
  • FULLSPD/FULLSPD Input Sets PWM to 100%
  • Pin- Selectable OT Output Threshold
  • 16- Pin QSOP and 10- Pin μMAX Packages

Applications

AI Translation
  • Networking Equipment
  • Storage Equipment
  • Servers
  • Desktop Computers
  • Workstations