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TC650
(Rev.:2004)

Tiny Integrated Temperature Sensor & Brushless DC Fan Controller with Over-Temperature Alert

Microchip Technology 

TC650/TC651

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)

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

Storage Temperature ........................ –65°C to +150°C

† Notice: Stresses above those listed under "Absolute Maxi-

mum 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 above those indicated

in the operation sections of the specifications is not implied.

Exposure to Absolute Maximum Rating conditions for

extended periods may affect device reliability.

DC CHARACTERISTICS

Electrical Specifications: Unless otherwise specified, VDD = 2.8V to 5.5V, SHDN = VDD, TA = –40°C to +125°C.

Parameters

Sym

Min

Typ

Max Units

Conditions

Supply Voltage

Supply Current

SHDN Input

VDD

2.8

—

5.5

V

IDD

—

50

90

µA PWM, TOVER are open

SHDN Input High Threshold

VIH

SHDN Input Low Threshold

VIL

PWM Output

65

—

— %VDD

—

—

15 %VDD

PWM Output Low Voltage

PWM Output High Voltage

PWM Rise Time

VOL

VOH

tR

—

—

VDD – 0.5

—

—

10

0.3

V ISINK = 1 mA

—

V ISOURCE = 5 mA

—

µs IOH = 5 mA, 1 nF from

PWM to GND

PWM Fall Time

tF

—

10

—

µs IOL = 1 mA, 1 nF from

PWM to GND

PWM Frequency

Start-up Time

fOUT

tSTARTUP

10

15

—

Hz

—

32/fOUT — sec VDD Rises from GND

or SHDN Released

Temperature Accuracy

High Temperature Accuracy

TH ACC

Temperature Range Accuracy (TH –TL) ACC

TH – 3

–1.0

–2.5

TH

TH + 3

—

+1.0

—

+2.5

Auto-shutdown Hysteresis

THYST

— (TH -TL)/5 —

TOVER Output

TOVER Output High Voltage

VHIGH

VDD – 0.5

—

—

TOVER Output Low Voltage

VLOW

—

—

0.4

Absolute Accuracy

TOVER ACC

—

TH + 10 —

Trip Point Hysteresis

TOVER HYST

—

5

—

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

°C Note 1

°C (TH – TL) ≤ 20°C

°C (TH – TL) ≥ 20°C

°C TC651 Only

V ISOURCE = 1.2 mA

V ISINK = 2.5 mA

°C At Trip Point

°C

 2004 Microchip Technology Inc.

DS21450C-page 3

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