AM4964

Document number: DS37241 Rev. 2 - 2

3 of 21

www.diodes.com

June 2014

© Diodes Incorporated

AM4964

A Product Line of

Diodes Incorporated

Pin Descriptions

Pin Number

Pin Name

Function

1,20

NC

Not connected

2

PGND

Power ground

3

OUT2

Fan driver output2

4

VCC

Power supply

5

VMIN

Minimum speed setting pin

6

PWM

PWM pulse input terminal

7

CF

Filter capacitor

8

FG

FG signal output

9

RT

RT signal output

10

TL

Low temperature set resistor

11

IN+

Hall sensor input+

12

HB

Hall bias voltage

13

IN-

Hall sensor input-

14

RADJ

Output pulse duty/input pulse duty adjustable terminal

15

CT

Lock protect and auto start

16

SGND

Signal ground

17

TH

High temperature set resistor

18

TA

Output duty gap adjust pin between low and high temperature at 100% input duty

19

OUT1

Fan driver output1

Exposed pad

Central exposed pad

– The central exposed pad is for thermal dissipation. On PCB layout, the

exposed pad can be connected to GND or remain unconnected to any other signals