Rainbow-electronics MAX6660 Manual do Utilizador descarregar pdf (Página 2)

MAX6660

Remote-Junction Temperature-Controlled

Fan-Speed Regulator with SMBus Interface

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= +3V to +5.5V, V

VFAN

= +12V, T

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

= +3.3V and

= +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.

All Voltages Referenced to GND

, ADD0, ADD1, SMBDATA,

SMBCLK, ALERT, OVERT ...................................-0.3V to +6V

FAN

, TACH IN, FAN .............................................-0.3V to +16V

DXP, GAIN..................................................-0.3V to (V

+ 0.3V)

DXN.............................................................................-0.3V to 1V

SMBDATA, ALERT, OVERT Current ...................-1mA to +50mA

DXN Current ......................................................................±1mA

FAN Out Current ..............................................................500mA

ESD Protection (Human Body Model)................................2000V

Continuous Power Dissipation (T

= +70°C)

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 SYM BOL CONDITIONS MIN TYP MAX UNITS

ADC AND POWER SUPPLY

Supply Voltage V

3.0 5.5 V

FAN

Supply Voltage V

VFAN

4.5 13.5 V

Operating Supply Current I

Fan off 250 500 µA

Shutdown Supply Current I

SHDN

Shutdown 3 10 µA

0.125 °C

Temperature Resolution

11 Bits

= +60°C to +100°C -1 +1

= +25°C to +125°C -3 +3

Temperature Error (Note 2) T

= +85°C,

= +3.3V

= -40°C to +125°C -5 +5

°C

Internal Reference Frequency

Accuracy

+25 -25 %

Temperature Conversion Time 0.25 s

Conversion Rate Timing Error -25 +25 %

Undervoltage Lockout Threshold V

UVLO

falling 2.50 2.80 3.00 V

Undervoltage Lockout Threshold

Hysteresis

HYST

90 mV

Power-On-Reset (POR)

Threshold (V

)

rising 1.4 2.0 2.5 V

POR Threshold Hysteresis 90 mV

High level 80 100 120

Remote-Junction Source Current I

Low level 8 10 12

µA

DXN Source Voltage V

DXN

0.7 V

1 2 3 4 5 6 7 ... 20 21

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