TC650(2004) データシートの表示（PDF） - Microchip Technology

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TC650
(Rev.:2004)

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

Microchip Technology 

TC650/TC651

3.0 PIN DESCRIPTION

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1:

Pin No.

1

2

3

4

5

6

7

8

PIN FUNCTION TABLE

Symbol

VDD

NC

SHDN

GND

NC

TOVER

GND

PWM

Description

Power Supply Input

No Internal Connect

Fan Shutdown, Active-low Input

1 = Fan in normal operation

0 = Fan in shutdown

Ground

No Connect

Overtemperature Alert, Active-low Output

1 = Overtemperature condition does not exist

0 = The device is in the overtemperature condition. The fan is driven at 100%.

Potential exists for system over-heating

Ground

PWM Fan Drive Output

3.1

Power Supply Input

May be independent of fan power supply.

3.4 Overtemperature Alert

Active-low output.

3.2 Fan Shutdown, Active-low Input

During Shutdown mode, the chip still monitors

temperature. TOVER is low if temperature rises above

factory set point.

3.5 PWM Fan Drive Output

Pulse width modulated rail-to-rail logic output. Nominal

frequency is 15 Hz.

3.3 Ground

Ground return for all TC650/TC651 functions.

DS21450C-page 6

 2004 Microchip Technology Inc.

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