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TC653

Integrated Temperature Sensor & Brushless DC Fan Controller with FanSense™ Detect & Over-Temperature

Microchip Technology 

TC652/TC653

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

Input Voltage (VDD to GND) ................................... +6V

Output Voltage (OUT to GND) ................................. 6V

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

Package Thermal Resistance (θJA ) ........... 250°C/W

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

Storage Temperature ......................... -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

periods may affect device reliability.

TC652/TC653 ELECTRICAL SPECIFICATIONS

Electrical Characteristics: VDD = 2.8V to 5.5V, SHDN = VDD, TA = -40°C to 125°C unless otherwise specified.

Symbol

Parameter

Min

Typ.

Max Units

Test Conditions

VDD

Supply Voltage

IDD

Supply Current

2.8

—

5.5

V

—

50

90

µA PWM, FAULT, TOVER are

open

SHDN Input

VIH

SHDN Input High Threshold

65

VIL

SHDN Input Low Threshold

—

PWM Output

—

—

%VDD

—

15

%VDD

VOL

PWM Output Low Voltage

VOH

PWM Output High Voltage

tR

PWM Rise Time

tF

PWM Fall Time

fOUT

tSTARTUP

PWM Frequency

Start-up Time

VTH (SENSE) Sense Input

—

VDD – 0.5

—

—

10

—

—

—

—

10

10

15

32/fOUT

70

0.3

V ISINK = 1mA

—

V ISOURCE = 5mA

—

µsec IOH = 5mA, 1nF from

PWM to GND

—

µsec IOL = 1mA, 1nF from

PWM to GND

—

Hz

—

sec VDD Rises from GND,

or SHDN Released

—

mV Sense Input Threshold

Voltage with Repect to

Ground

Temperature Accuracy

TH ACC

High Temperature Accuracy

(TH –TL) ACC Temp. Range Accuracy

THYST

Auto-shutdown Hysteresis

FAULT Output

TH - 3

-1.0

-2.5

—

TH

—

—

(TH – TL)/5

TH + 3

+1.0

+2.5

—

°C Note 1

°C (TH – TL) ≤ 20°C

°C (TH – TL) ≥ 20°C

°C TC653 Only

VHIGH

VLOW

tmp

FAULT Output High Voltage

FAULT Output Low Voltage

Missing Pulse Detector

Time-out

VDD – 0.5

—

—

—

—

V ISOURCE = 1.2mA

—

0.4

V ISINK = 2.5mA

—

32/fOUT Sec

TOVER Output

VHIGH

TOVER Output High Voltage

VLOW

TOVER Output Low Voltage

TOVER ACC Absolute Accuracy

TOVER HYST Trip Point Hysteresis

Note 1: Transition from 90% to 100% Duty Cycle.

VDD – 0.5

—

—

—

—

—

V ISOURCE = 1.2mA

—

0.4

V ISINK = 2.5mA

TH + 10

—

°C At Trip Point

5

—

°C

© 2002 Microchip Technology Inc.

DS21453B-page 3

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