Rainbow-electronics MAX6645 Manual do Utilizador descarregar pdf (Página 2)

MAX6643/MAX6644/MAX6645

Automatic PWM Fan-Speed Controllers with

Overtemperature Output

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= +3.0V to +5.5V, T

= -40°C to +125°C, unless otherwise noted. Typical values are at V

= +3.3V, T

= +25°C.) (Note 1)

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.

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 +(V

+ 0.3V)

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

Continuous Power Dissipation (T

= +70°C)

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

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

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Operating Supply Voltage Range

+3.0 +5.5

= +20°C to +60°C ±2

Remote Temperature Error

= +3.3V,

+20°C ≤ T

≤

+100°C

= 0°C to +125°C ±3

°C

= +10°C to +70°C

±2.5

Local Temperature Error V

= +3.3V

= 0°C to +125°C

±3.5

°C

Temperature Error from Supply

Sensitivity

±0.2

°C/V

Power-On-Reset (POR) Threshold

falling edge 1.5 2.0 2.5 V

POR Threshold Hysteresis 90 mV

Operating Current I

During a conversion 0.5 1 mA

Average Operating Current Duty cycle = 50%, no load 0.5 mA

Remote-Diode Sourcing Current High level 80

100

120 µA

Conversion Time

125

MAX664_ _A_ _ _ _ 2.5

Spin-Up Time

MAX664_ _B_ _ _ _ 8

MAX664_ _A_ _ _ _ 2.5

Startup Delay

MAX664_ _B_ _ _ _ 0.5

Minimum Fan-Fail Tachometer

Frequency

16 Hz

PWM_OUT Frequency

PWM_OUT

32 Hz

DIGITAL OUTPUTS (OT, FANFAIL, PWM_OUT)

Output Low Voltage (OT)V

SINK

= 1mA 0.4 V

SINK

= 6mA 0.5

Output Low Voltage

(FANFAIL, PWM_OUT)

SINK

= 1mA 0.4

Output-High Leakage Current I

= 3.3V 1 µA

1 2 3 4 5 6 7 ... 16 17

Comentários a estes Manuais

Sem comentários

Rainbow-electronics MAX6645 Manual do Utilizador Página 2

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Rainbow-electronics MAX6645