MAX6645 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX6645

Automatic PWM Fan-Speed Controllers with Overtemperature Output

Maxim Integrated 

Automatic PWM Fan-Speed Controllers with

Overtemperature Output

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +3.0V to +5.5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VDD = +3.3V, TA = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

DIGITAL INPUTS (FULLSPD, FULLSPD, TACHSET)

Logic-Input High

VIH

VDD = 5.5V

VDD = 3.0V

3.65

V

2.2

Logic-Input Low

VIL

VDD = 3.0V

0.8

V

Input Leakage Current

VIN = GND or VDD

-1

+1

µA

Note 1: All parameters tested at TA = +25°C. Specifications over temperature are guaranteed by design.

(TA = +25°C, unless otherwise noted.)

Typical Operating Characteristics

OPERATING SUPPLY CURRENT

vs. SUPPLY VOLTAGE

400

PWMOUT FREQUENCY

vs. DIE TEMPERATURE

32.0

360

31.8

320

31.6

280

31.4

240

31.2

200

3.0 3.5 4.0 4.5 5.0 5.5

SUPPLY VOLTAGE (V)

PWMOUT FREQUENCY

vs. SUPPLY VOLTAGE

35

34

33

32

31

30

3.0 3.5 4.0 4.5 5.0 5.5

SUPPLY VOLTAGE (V)

31.0

-40 -15 10 35 60 85 100

TEMPERATURE (°C)

TRIP-THRESHOLD ERROR

vs. TRIP TEMPERATURE

1.0

MAX664_L VERSIONS

0.6

0.2

-0.2

-0.6

-1.0

20

40

60

80

100

TRIP TEMPERATURE (°C)

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