RT9027A View Datasheet(PDF) - Richtek Technology

Part Name

Description

MFG CO.

RT9027A

Linear Fan Driver

Richtek Technology 

RT9027A/B

Functional Pin Description

Pin No.

1

2

Pin Name

Pin Function

FON

EN

Internal pulled high. For RT9027A, the IC will be fully turned on when this pin’s voltage is

below 0.4V.

Internal pulled high. For RT9027B, the IC will be shutdown when this pin’s voltage is

below 0.4V.

VIN

Input Voltage Pin.

3 VOUT

4 VSET

5 to 8 GND

Output Voltage Pin.

This pin is used for output voltage setting. It is necessary to make this pin higher than 1V

to guarantee VOUT to be 1.6 times of VSET. The IC will be shutdown when this pin voltage

is below 1V.

Ground.

Function Block Diagram

VIN

VSET

FON/EN

GND

VIN POR

BIAS+Thermal

Shutdown

Logic

VSET POR

(Enable)

-

EA

+

OCP

0.6

1

VOUT

www.richtek.com

2

Downloaded from Elcodis.com electronic components distributor

DS9027A/B-01 October 2008

Free Datasheet http://www.Datasheet-PDF.com/

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