TC652 datasheet(4/14 Pages) MICROCHIP

tên linh kiện	TC652

Giải thích chi tiết về linh kiện	Integrated Temperature Sensor & Brushless DC Fan

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4 / 14 page

TC652/TC653

DS21453B-page 4

2.0

PIN DESCRIPTIONS

Thedescriptionsof the pins arelistedinTable2-1.

TABLE 2-1:

PIN FUNCTION TABLE

Pin No.

(8-Pin MSOP)

Symbol

Description

1VDD

Power Supply Input. May be independent of fan power supply.

2FAULT

Fan Fault Alert, Active-Low Output. FAULT goes low to indicate a fan FAULT condition.

When FAULT occurs, the device is latched in Shutdown mode with PWM low. Toggling

the SHDN pinor cyclingthe VDD will release the part and fan from shutdown. FAULT will

unconditionally remain high during shutdown.

SHDN

Fan Shutdown, Active-Low Input. During Shutdown mode the chip still monitors

temperature and TOVER is low if temperature rises above factory set point.

GND

Ground return for all TC652/TC653 functions.

SENSE

Detect Fan Pulses Input. Pulses are detected at this pin as fan rotation chops the current

through the sense resistor, RSENSE. The absence of pulses indicates a Fan Fault.

6TOVER

Over-Temperature Alert, Active-Low Output.

GND

Ground.

PWM

PWM Fan Drive Output. Pulse width modulated rail-to-rail logic output. Nominal

Frequency is 15Hz.

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