EMC6W201-AEZG Datasheet EMC6W201-AEZG | P1-P3

SMSC EMC6W201 PRODUCT PREVIEW Revision 0.3 (03-01-07)

Data Brief

PRODUCT FEATURES

EMC6W201

Auto Fan Device with

Piecewise Linear Control,

Temperature Monitoring &

Voltage Monitoring for

Multi-Processor Systems

 3.3 Volt Operation (5 Volt Tolerant Input Buffers)

 SMBus 2.0 Compliant Interface (Fixed, Not

Discoverable) With Three Slave Address Options

— SMBus address change pin

— SMBus address enable pin

 Auto-Fan Control with ProcHot Features

— PWM (Pulse width Modulation) Outputs (3)

— Low Frequency and High Frequency PWM Options

(15kHz up to 30kHz)

— Fan Tachometer or Lock Rotor Inputs (4)

— Programmable automatic fan control based on

temperature

— Acoustic enhancement mode

— ProcHot pins modulate Tmin

— Fan RPM is a function of up to three temperatures and

ProcHot signals

— Piecewise linear fan control algorithm option

 Temperature Monitor

— Monitoring of up to Five Remote Thermal Diodes (+/- 3

deg C accuracy)

— Internal Ambient Temperature Measurement

— Limit Comparison of all Monitored Values

— Interrupt Pin for out-of-limit Temperature Indication

— Configurable offset for internal or external temperature

channels.

 Voltage Monitor

— Monitor Power supplies (+1.5V, +2.5V, +5V, VCC and

two 1.5V VCCP)

— Limit Comparison of all Monitored Values

— Interrupt Pin for out-of-limit Voltage Indication

 ProcHot Input/Bi-directional Pins (2)

— Selectable pins dedicated as input or input/output

— Seperate ProcHot Output pin (FORCED_PR#)

 Power Good Output

 SMBus Alert Interrupt Output

 Register Characteristics

— Individual enables/disables for each input

— Two ISRs for each alert

 XOR Tree Test Mode

 Mechanical Package: 36-pin QFN, lead-free RoHS

Compliant

ORDER NUMBER:

EMC6W201-AEZG FOR 36-PIN QFN LEAD-FREE ROHS COMPLIANT PACKAGE

80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123

Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for

construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC

reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications

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version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors

known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not

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Auto Fan Device with Piecewise Linear Control, Temperature Monitoring & Voltage Monitoring for Multi-

Processor Systems

Revision 0.3 (03-01-07) 2 SMSC EMC6W201

PRODUCT PREVIEW

Auto Fan Device with Piecewise Linear Control, Temperature Monitoring & Voltage Monitoring for Multi-

Processor Systems

SMSC EMC6W201 3 Revision 0.3 (03-01-07)

PRODUCT PREVIEW

General Description

The EMC6W201 is an environmental monitoring device with automatic fan control capability and

enhanced system acoustics for noise suppression. This ACPI compliant device provides hardware

monitoring for up to six voltages (including its own VCC) and five external thermal sensors, measures

the speed of up to five fans, and controls the speed of multiple DC fans using three Pulse Width

Modulator (PWM) outputs. Note that it is possible to control more than three fans by connecting two

fans to one PWM output. The EMC6W201 will be available in a 36-pin QFN, lead-free RoHS Compliant

package.

The EMC6W201 includes support for monitoring six thermal sensors: five external and one internal.

The external temperatures are measured via thermal diode inputs capable of monitoring remote

devices. In addition, it is equipped with an ambient temperature sensor for measuring the internal

temperature.

The EMC6W201 hardware monitor provides analog inputs for monitoring external voltages of +1.5V,

+2.5V, +5V, and two Vccp voltages. This device has the capability to monitor its own internal VCC

power supply, which may be connected to either main power (VCC) or the suspend power well (VTR).

External components are not required for voltage scaling or similar treatment.

Pulse Width Modulators (PWM) will control the speed of the fans by varying the output duty cycle of

the PWM. The Ramp Rate Control feature controls the rate of change of the PWM output, thereby

reducing system noise created by changing the fan speed. The speed of each fan is monitored by a

Fan Tachometer input. The measured values are compared to values stored in Limit Registers to

detect if a fan has stalled or seized.

Fan speed may be under host software control or automatic. In host control mode, the host software

continuously monitors temperature and fan speed registers, makes decisions as to desired fan speed

and sets each PWM to drive the required fan speed. The PWM frequency is adjustable up to 30kHz.

The EMC6W201 device offers an interrupt output signal (INT#), which may be used to interrupt the

host on out-of-limit temperature or voltage condition enabling an ACPI response as opposed to the

host software continuously monitoring status.

In auto “zone” mode, the EMC6W201 logic continuously monitors the temperature and fan speeds and

adjusts speeds without intervention from the host CPU. Fan speed is adjusted according to an

algorithm using the temperature measured in the selected zone, the high and low limits set by the user,

and the current fan speed. The part can automatically adjust its operation based on its environment

for improved acoustic behavior.

Overview

The EMC6W201 device is an intelligent fan control system with reduced overall acoustic noise

features. The EMC6W201 monitors voltages, external temperatures, and fan speeds. It uses this

monitoring capability to alert the system to out of limit conditions and can automatically control the

speeds of multiple fans.

P1-P3 P4-P5

EMC6W201-AEZG

Mfr. #:

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Description:

IC LINEAR FAN CTRLR 36QFN

Lifecycle:

New from this manufacturer.

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EMC6W201-AEZG