TC647(2002) View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

TC647
(Rev.:2002)

PWM Fan Speed Controller with FanSense™ Technology

Microchip Technology 

TC647

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

Supply Voltage ......................................................... 6V

Input Voltage, Any Pin.... (GND – 0.3V) to (VDD +0.3V)

Package Thermal Resistance:

PDIP (RθJA)............................................. 125°C/W

SOIC (RθJA) ............................................ 155°C/W

MSOP (RθJA) .......................................... 200°C/W

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

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

*Stresses above those listed under "Absolute Maximum Rat-

ings" may cause permanent damage to the device. These are

stress ratings only and functional operation of the device at

these or any other conditions above those indicated in the

operation sections of the specifications is not implied. Expo-

sure to absolute maximum rating conditions for extended peri-

ods may affect device reliability.

DC ELECTRICAL SPECIFICATIONS

Electrical Characteristics: Unless otherwise specified, TMIN < TA < TMAX, VDD = 3.0V to 5.5V.

Symbol

Parameter

Min

Typ

Max

Units

VDD

Supply Voltage

3.0

—

5.5

V

IDD

Supply Current, Operating

—

0.5

1

mA

IDD(SHDN)

IIN

VOUT Output

tR

tF

tSHDN

IOL

IOH

VIN, VMIN Inputs

VC(MAX)

VC(SPAN)

VSHDN

VREL

Supply Current,

Shutdown Mode

VIN, VMIN Input Leakage

VOUT Rise Time

VOUT Fall Time

Pulse Width (On VMIN) to Clear

Fault Mode

Sink Current at VOUT Output

Source Current at VOUT Output

Input Voltage at VIN or VMIN for

100% PWM Duty Cycle

VC(MAX) - VC(MIN)

Voltage Applied to VMIN to

Ensure Shutdown Mode

Voltage Applied to VMIN to

Release Shutdown Mode

Pulse Width Modulator

FPWM

SENSE Input

PWM Frequency

VTH(SENSE)

SENSE Input Threshold

Voltage with Respect to GND

FAULT Output

VOL

tMP

tSTARTUP

tDIAG

Note 1:

Output Low Voltage

Missing Pulse Detector Timer

Start-up Timer

Diagnostic Timer

Ensured by design, not tested.

—

25

—

µA

– 1.0

—

+1.0

µA

—

—

50

µsec

—

—

50

µsec

30

—

—

µsec

1.0

—

—

mA

5.0

—

—

mA

2.5

2.65

2.8

V

1.3

1.4

1.5

V

—

— VDD x 0.13

V

VDD x 0.19 —

—

V

26

30

34

Hz

50

70

90

mV

—

—

0.3

V

—

32/F

—

Sec

—

32/F

—

Sec

—

3/F

—

Sec

Test Conditions

Pins 6, 7 Open,

CF = 1 µF, VIN = VC(MAX)

Pins 6, 7 Open,

CF = 1 µF, VMIN = 0.35V

Note 1

IOH = 5 mA, Note 1

IOL = 1 mA, Note 1

VSHDN, VHYST

Specifications, Note 1

VOL = 10% of VDD

VOH = 80% of VDD

VDD = 5V

CF = 1.0 µF

Note 1

IOL = 2.5 mA

 2002 Microchip Technology Inc.

DS21447C-page 3

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