TC649VUATR View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

TC649VUATR

PWM Fan Speed Controller with Auto-Shutdown and FanSense™ Technology

Microchip Technology 

TC649

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

DC ELECTRICAL SPECIFICATIONS

*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.

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

Symbol

Parameter

Min

Typ

Max Units

Test Conditions

VDD

Supply Voltage

3.0

IDD

Supply Current, Operating

—

IDD(SHDN) Supply Current, Shutdown/

—

Auto-shutdown Mode

IIN

VIN, VAS Input Leakage

-1.0

VOUT Output

tR

VOUT Rise Time

—

tF

VOUT Fall Time

—

tSHDN

Pulse Width (On VIN) to Clear Fault

30

Mode

IOL

Sink Current at VOUT Output

1.0

IOH

Source Current at VOUT Output

5.0

SENSE Input

—

5.5

V

0.5

1.0

mA Pins 6, 7 Open,

CF = 1 µF, VIN = VC(MAX)

25

—

µA Pins 6, 7 Open; Note 1

CF =1 µF, VIN = 0.35V

—

+1.0

µA

—

50

µsec IOH = 5 mA, Note 1

—

50

µsec IOL = 1 mA, Note 1

—

—

µsec VSHDN, VHYST

Specifications, Note 1

—

—

mA VOL = 10% of VDD

—

—

mA VOH = 80% of VDD

VTH(SENSE) SENSE Input threshold Voltage with

50

Respect to GND

70

90

mV Note 1

FAULT Output

VOL

tMP

tSTART

tDIAG

Output Low Voltage

Missing Pulse Detector Timer

Start-up Timer

Diagnostic Timer

—

—

0.3

V IOL = 2.5 mA

—

32/F

—

Sec CF = 1.0 µF

—

32/F

—

Sec CF = 1.0 µF

—

3/F

—

Sec CF = 1.0 µF

VIN, VAS Inputs

VC(MAX)

VC(SPAN)

VAS

VSHDN

Voltage at VIN for 100% Duty Cycle

VC(MAX) - VC(MIN)

Auto-shutdown Threshold

Voltage applied to VIN to Release

Reset/Shutdown

2.5

1.3

VC(MAX) -VC(SPAN)

—

2.65

1.4

—

—

2.8

V

1.5

V

VC(MAX)

V

VDD x 0.13 V

VREL

Voltage applied to VIN to Release

VDD x 0.19

—

Reset Mode

—

V VDD = 5V,

See Figure 5-11

VHYST

VHAS

Hysteresis on VSHDN, VREL

Hysteresis on Auto-shutdown

Comparator

—

0.01 x VDD

—

V

—

70

—

mV

Pulse Width Modulator

FOSC

PWM Frequency

Note 1: Ensured by design, not tested.

26

30

34

Hz CF = 1.0 µF

 2002 Microchip Technology Inc.

DS21449C-page 3

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