Rainbow-electronics MAX6670 Uživatelský manuál stáhnout pdf (Strana 2)

MAX6668/MAX6670

Remote Temperature Switches with Integrated

Fan Controller/Driver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= +3V to +3.6V, T

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

= +3.3V and T

= +25°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.

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

PGND to GND .......................................................-0.3V to +0.3V

FANOUT to GND ....................................................-0.3V to +15V

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

DXP, WARN, HYST, FORCEON, OT...........-0.3V to (V

+ 0.3V)

Current into V

, GND, DXP, DXN, WARN, HYST,

FORCEON, OT..............................................................±20mA

Current into FANOUT, PGND ........................................ ±300mA

Continuous Power Dissipation (T

= +70°C)

8-Pin µMAX (derate 4.1mW/°C above +70°C).............333mW

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

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

Storage Temperature Range .............................-60°C to +150°C

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

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER SUPPLY

Power-Supply Range V

3 3.6 V

Average Supply Current I

110 200 µA

Operating Current During sampling 400 650 µA

Power-On Reset (POR) Threshold POR V

falling edge 1 1.5 2.0 V

POR Threshold Hysteresis 50 mV

TEMPERATURE SENSOR

= +40°C to +75°C (Note 1),

= 0°C to +85°C, V

= +3.3V

±1 ±2.2

FANOUT Temperature

Threshold Accuracy

∆T

= +40°C to +75°C (Note 1),

= -40°C to +125°C, V

= +3.3V

±1 ±4

°C

HYST = GND 4

HYST = float 8

MAX6670

HYST = V

FANOUT Temperature

Threshold Hysteresis

HYST

MAX6668 8

°C

WARN Temperature Threshold

(MAX6670 Only)

Relative to FANOUT temperature threshold +15 °C

OT Temperature Threshold

(MAX6670 Only)

Relative to FANOUT temperature threshold +30 °C

Supply Sensitivity of Temperature

Threshold

1 1.6 °C/V

Temperature Sample Frequency 3.3 4 Hz

FAN DRIVE OUTPUT

FANOUT Output Voltage Low V

SINK

= 250mA 0.5 1 V

Thermal Shutdown 170 °C

Thermal Shutdown Hysteresis 20 °C

LOGIC INPUT/OUTPUT

FORCEON Input High Voltage V

0.8 x

1 2 3 4 5 6 7 8

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