Rainbow-electronics MAX6660 Manuel d'utilisateur télécharger pdf

General Description

The MAX6660 is a remote temperature sensor and fan-

speed regulator that provides a complete fan-control

solution. The remote temperature sensor is typically a

common-collector PNP, such as a substrate PNP of a

microprocessor, or a diode-connected transistor, typi-

cally a low-cost, easily mounted 2N3904 NPN type or

2N3906 PNP type.

The device also incorporates a closed-loop fan con-

troller that regulates fan speed with tachometer feed-

back. The MAX6660 compares temperature data to a

fan threshold temperature and gain setting, both pro-

grammed over the SMBus™ by the user. The result is

automatic fan control that is proportional to the remote-

junction temperature. The temperature feedback loop

can be broken at any time for system control over the

speed of the fan.

Fan speed is voltage controlled as opposed to PWM

controlled, greatly reducing acoustic noise and maxi-

mizing fan reliability. An on-chip power device drives

fans rated up to 250mA.

Temperature data is updated every 0.25s and is read-

able at any time over the SMBus interface. The

MAX6660 is accurate to 1°C (max) when the remote

junction is between +60°C to +100°C. Data is formatted

as a 10-bit + sign word with 0.125°C resolution.

The MAX6660 is specified for -40°C to +125°C and is

available in a 16-pin QSOP package.

Applications

Notebooks

Telecom Systems

Industrial Control Systems

Servers

Workstations

Features

♦ Integrated Thermal Sensing and Fan-Regulation

Solution

♦ Programmable Fan Threshold Temperature

♦ Programmable Temperature Range for Full-Scale

Fan Speed

♦ Accurate Closed-Loop Fan-Speed Regulation

♦ On-Chip Power Device Drives Fans Rated

Up to 250mA

♦ Programmable Under/Overtemperature Alarms

♦ SMBus 2-Wire Serial Interface with Timeout

(Cannot “Lock Up” the SMBus)

♦ Supports SMBus Alert Response

♦ ACPI Compatible, Including OVERT System

Shutdown Function

♦ ±1°C (+60°C to +100°C) Thermal-Sensing Accuracy

♦ MAX6660EVKIT Available

MAX6660

Remote-Junction Temperature-Controlled

Fan-Speed Regulator with SMBus Interface

________________________________________________________________ Maxim Integrated Products 1

PART TEMP. RANGE PIN-PACKAGE

MAX6660AEE -40°C to +125°C 16 QSOP

19-2225; Rev 0; 10/01

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

Pin Configuration appears at end of data sheet.

SMBus is a trademark of Intel Corp.

1µF

5kΩ

FAN

+12V

2200pF

PENTIUM

SMBCLK

SMBDATA

ALERT

OVERT

CLOCK

DATA

INTERUPT

TO µP

TO SYSTEM

SHUTDOWN

VFAN

ADD1ADD0

PGND

0.1µF

+3V TO +5.5V

50Ω

STBY

TACH IN

FAN

DXP

DXN

AGND

10kΩ

EACH

MAX6660

Typical Operating Circuit

1 2 3 4 5 6 ... 20 21

Résumé du contenu

Page 1 - Typical Operating Circuit

General DescriptionThe MAX6660 is a remote temperature sensor and fan-speed regulator that provides a complete fan-controlsolution. The remote tempera

Page 2 - ELECTRICAL CHARACTERISTICS

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface10 _____________________________________________________________

Page 3

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface________________________________________________________________

Page 4 - = +3.3V, T

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface12 _____________________________________________________________

Page 5 - Pin Description

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface________________________________________________________________

Page 6

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface14 _____________________________________________________________

Page 7 - PC Board Layout

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface________________________________________________________________

Page 8 - Complement)

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface16 _____________________________________________________________

Page 9

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface________________________________________________________________

Page 10 - Diode Fault Alarm

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface18 _____________________________________________________________

Page 11

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface________________________________________________________________

Page 12 - POR and UVLO

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface2 ______________________________________________________________

Page 13

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface20 _____________________________________________________________

Page 14 - (ADD0 and ADD1)

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses arei

Page 15 - Fan Loop

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface________________________________________________________________

Page 16

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface4 ______________________________________________________________

Page 17

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface________________________________________________________________

Page 18

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface6 ______________________________________________________________

Page 19 - Applications Information

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface________________________________________________________________

Page 20 - Pin Configuration

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface8 ______________________________________________________________

Page 21 - Package Information

MAX6660Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface________________________________________________________________

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Rainbow-electronics MAX6660 Manuel d'utilisateur

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Résumé du contenu

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