TC652_13 datasheet(4/16 Pages) MICROCHIP

Part #	TC652

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

PDF	16 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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4 / 16 page

TC652/TC653

DS21452C-page 4

 2002-2012 Microchip Technology Inc.

2.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 2-1.

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 pin or cycling the 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.

TOVER

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.

TC652 Datasheet(PDF) 4 Page - Microchip Technology