Rainbow-electronics MAX1669 Uživatelský manuál stáhnout pdf

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

General Description

The MAX1669 fan controller includes a precise digital

thermometer that reports the temperature of a remote

sensor. The remote sensor is a diode-connected transis-

tor—typically a low-cost, easily mounted 2N3906 PNP

type—replacing conventional thermistors or thermocou-

ples. Remote accuracy is ±3°C for transistors from multi-

ple manufacturers, with no calibration needed. The

MAX1669 has an independent fan controller with a low-

current logic output requiring external power compo-

nents to interface to a DC brushless fan. The fan

controller has two modes of operation: a low-frequency

(20Hz to 160Hz) PWM mode intended for driving the fan

motor, or a high-impedance DAC output that generates

a variable DC control voltage. In PWM mode, the FAN

frequency can be synchronized to an external clock.

Other key features include general-purpose inputs/out-

puts (GPIOs) for fan presence detection and a thermo-

stat output intended as a fan override signal in case the

host system loses the ability to communicate. The inter-

nal ADC has a wide input voltage range and gives

overrange readings when too large an input voltage is

applied. Other error-checking includes temperature

out-of-range indication and diode open/short faults.

The MAX1669 is available in a space-saving 16-pin

QSOP package that allows it to fit adjacent to the

SLOT1 connector.

Applications

Pentium

CPU Cooling

Desktop Computers

Notebook Computers

Servers

Workstations

Features

♦ Measures Remote CPU Temperature

♦ No Calibration Required

♦ 20Hz to 160Hz PWM Output for Fan

♦ PWM Frequency Sync Input (260kHz)

♦ Flexible Fan Interface: Linear or PWM

♦ SMBus 2-Wire Serial Interface

♦ Programmable Under/Overtemperature Alarms

♦ ALERT Latched Interrupt Output

♦ OVERT Thermostat Output

♦ Two GPIO Pins

♦ Write-Once Configuration Protection

♦ Supports SMBus Alert Response

♦ ±3°C Temperature Accuracy (-40°C to +125°C,

remote)

♦ 3µA Standby Supply Current

♦ +3V to +5.5V Supply Range

♦ Small 16-Pin QSOP Package

MAX1669

Fan Controller and Remote Temperature Sensor

with SMBus Serial Interface

________________________________________________________________ Maxim Integrated Products 1

I/O1 OVERT

ALERT

SMBDATA

SMBCLK

PGND

FAN

SYNC

TOP VIEW

MAX1669

QSOP

I/O2

ADD0

AGND

ADD1

ADD2

DXN

DXP

19-1574; Rev 0; 1/00

PART

MAX1669EEE

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

16 QSOP

Pentium is a registered trademark of Intel Corp.

Pin Configuration

Ordering Information

Typical Operating Circuit appears at end of data sheet.

1 2 3 4 5 6 ... 19 20

Shrnutí obsahu

Strany 1 - Ordering Information

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.General Descript

Strany 2 - ELECTRICAL CHARACTERISTICS

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface10 _____________________________________________________________________

Strany 3

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface________________________________________________________________________

Strany 4

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface12 _____________________________________________________________________

Strany 5

GPIO Data RegisterI/O1 and I/O2 are configured through the GPIO dataregister and CONFIG byte register (Table 7 and Table 3).Upon power-up, the GPIOs a

Strany 6 - Pin Description

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface14 _____________________________________________________________________

Strany 7

Slave AddressesThe MAX1669 appears to the SMBus as one devicehaving a common address for the temperature sensorsection, GPIO section, and fan-control

Strany 8

MAX1669Power-Up Defaults• Interrupt latch is cleared.• ADC begins autoconverting at a 2Hz rate.• Command byte is set to 01h to facilitate quickremote

Strany 9 - Diode Fault Alarm

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface________________________________________________________________________

Strany 10 - Response Address (0001100b)

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface18 _____________________________________________________________________

Strany 11

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface________________________________________________________________________

Strany 12 - FAN Output in DAC Mode

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface2 ______________________________________________________________________

Strany 13 - GPIO Data Register

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial InterfaceMaxim cannot assume responsibility for use of any circuitry other than c

Strany 14 - Write-Once Protection

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface________________________________________________________________________

Strany 15 - (ADD_ Pins)

Note 1: Guaranteed but not 100% tested.Note 2: TRis the junction temperature of the remote diode. The temperature error specification is optimized to

Strany 16 - FAN Application Circuits

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface________________________________________________________________________

Strany 17

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface6 ______________________________________________________________________

Strany 18 - Typical Operating Circuit

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface________________________________________________________________________

Strany 19 - Chip Information

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface8 ______________________________________________________________________

Strany 20 - Package Information

MAX1669Fan Controller and Remote Temperature Sensorwith SMBus Serial Interface________________________________________________________________________

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Rainbow-electronics MAX1669 Uživatelský manuál

Procházejte online nebo si stáhněte Uživatelský manuál pro Senzory Rainbow-electronics MAX1669. Rainbow Electronics MAX1669 User Manual Uživatelská příručka

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