MAX6645 データシートの表示（PDF） - Maxim Integrated

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MAX6645

Automatic PWM Fan-Speed Controllers with Overtemperature Output

Maxim Integrated 

Automatic PWM Fan-Speed Controllers with

Overtemperature Output

ABSOLUTE MAXIMUM RATINGS

VDD to GND ..............................................................-0.3V to +6V

PWM_OUT, OT, and FANFAIL to GND.....................-0.3V to +6V

FAN_IN1 and FAN_IN2 to GND...........................-0.3V to +13.2V

DXP_ to GND.........................................................-0.3V to +0.8V

FULLSPD, FULLSPD, TH_, TL_, TACHSET,

and OT_ to GND ..................................-0.3V to +(VDD + 0.3V)

FANFAIL, OT Current ..........................................-1mA to +50mA

Continuous Power Dissipation (TA = +70°C)

16-Pin QSOP (derate 8.3mW/°C above +70°C).......... 667mW

10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature ......................................................+150°C

Storage Temperature Range ............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(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

Operating Supply Voltage Range

VDD

+3.0

+5.5

V

Remote Temperature Error

VDD = +3.3V,

+20°C ≤ TRJ ≤

+100°C

TA = +20°C to +60°C

TA = 0°C to +125°C

±2

°C

±3

Local Temperature Error

Temperature Error from Supply

Sensitivity

VCC = +3.3V

TA = +10°C to +70°C

TA = 0°C to +125°C

±0.2

±2.5

±3.5

°C

°C/V

Power-On-Reset (POR) Threshold

POR Threshold Hysteresis

Operating Current

Average Operating Current

Remote-Diode Sourcing Current

Conversion Time

Spin-Up Time

Startup Delay

VDD falling edge

IS

During a conversion

Duty cycle = 50%, no load

High level

MAX664_ _B_ _ _ _

MAX664_ _B_ _ _ _

1.5

2.0

2.5

V

90

mV

0.5

1

mA

0.5

mA

80

100

120

µA

125

ms

8

s

0.5

s

Minimum Fan-Fail Tachometer

Frequency

PWM_OUT Frequency

FPWM_OUT

DIGITAL OUTPUTS (OT, FANFAIL, PWM_OUT)

Output Low Voltage (OT)

VOL

ISINK = 1mA

Output Low Voltage

(FANFAIL, PWM_OUT)

VOL

ISINK = 6mA

ISINK = 1mA

Output-High Leakage Current

IOH

VOH = 3.3V

16

Hz

32

Hz

0.4

V

0.5

V

0.4

1

µA

2 _______________________________________________________________________________________

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