Microchip Technology TC64X, TC64XB User Manual

M

TC64X/TC64XB Fan Control

Demo Board User’s Guide

 2003 Microchip Technology Inc. DS21401C

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical
components in life support systems is not authorized except
with express written approval by Microchip. No licenses are
conveyed, implicitly or otherwise, under any intellectual
property rights.

Trademarks

The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, K

EELOQ

, MPLAB, PIC, PICmicro, PICSTART,
PRO MATE and PowerSmart are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.

AmpLab, FilterLab, microID, MXDEV, MXLAB, PICMASTER,
SEEVAL and The Embedded Control Solutions Company are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.

Application Maestro, dsPICDEM, dsPICDEM.net, ECAN,
ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
PICkit, PICDEM, PICDEM.net, PowerCal, PowerInfo,
PowerMate, PowerTool, rfLAB, rfPIC, Select Mode,
SmartSensor, SmartShunt, SmartTel and Total Endurance are
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.

Serialized Quick Turn Programming (SQTP) is a service mark
of Microchip Technology Incorporated in the U.S.A.

All other trademarks mentioned herein are property of their
respective companies.

© 2003, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.

Printed on recycled paper.

Microchip received QS-9000 quality system
certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999
and Mountain View, California in March 2002.
The Company’s quality system processes and
procedures are QS-9000 compliant for its
PICmicro
devices, Serial EEPROMs, microperipherals,
non-volatile memory and analog products. In
addition, Microchip’s quality system for the
design and manufacture of developmen t
systems is ISO 9001 certified.

®

8-bit MCUs, KEEL

®

code hopping

OQ

DS21401C-page ii  2003 Microchip Technology Inc.

TC64X/TC64XB FAN CONTROL

M

DEMO BOARD USER’S GUIDE

Table of Contents

Chapter 1. General Information

1.1 Introduction ..................................................................................................... 1

1.2 TC64X/TC64XB Fan Control Demo Board ..................................................... 2

1.3 Reference Documents .................................................................................... 4

Chapter 2. Getting Started

2.1 TC64X/TC64XB Fan Control Demo Board

Typical Module Configurations ....................................................................... 5

2.2 System Connection For +5V Operation .......................................................... 6

Appendix A. Board Layout and Schematic

A.1 Introduction ..................................................................................................... 7

A.2 Board Layout and Schematic ......................................................................... 7

Appendix B. Bill-of-Materials (BOM)

B.1 Demo Board Components ............................................................................. 9

Worldwide Sales and Service

............................................................................................. 10

 2003 Microchip Technology Inc. DS21401C-page iii

TC64X/TC64XB Fan Control Demo Board User’s Guide

NOTES:

DS21401C-page iv  2003 Microchip Technology Inc.

TC64X/TC64XB FAN CONTROL

M

Chapter 1. General Information

1.1 INTRODUCTION

Thank you for purchasing the TC64X/TC64XB Fan Control Demo Board from
Microchip Technology Inc. The TC64X/TC64XB Fan Control Demo Board allows the
user to quickly prototype fan control circuits based on Microchip’s pulse width
modulation (PWM) Fan Control integrated circuits.

These devices will be referred to as TC64X in this document:

•TC642

•TC646

•TC647

•TC648

•TC649

These devices will be referred to as TC64XB in this document:

•TC642B

•TC646B

•TC647B

•TC648B

•TC649B

DEMO BOARD USER’S GUIDE

A versatile sensor input and output driver circuitry allows the Fan Control Module to be
used with virtually any brushless DC fan and standard thermistor. An optional LED
status indicator gives a visual indication of a fan fault (stalled, open or unconnected fan)
or an overtemperature condition.

The TC64X/TC64XB Fan Control Demo Board has the following features:

1. Complete implementation of TC64X or TC64XB fan control circuitry on a

1.5" x 2.0" board

2. Works with standard thermistors

3. Temperature-proportional fan speed control

4. Overtemperature fault detection

5. Fan fault detection

6. Installs directly into user's end equipment

7. Speeds up prototyping, system development and system thermal
characterization

 2003 Microchip Technology Inc. DS21401C-page 1

TC64X/TC64XB Fan Control Demo Board User’s Guide

1.2 THE TC64X/TC64XB FAN CONTROL DEMO BOARD

The TC64X/TC64XB Fan Control Demo Board (Figure 1-1) measures only 1.5” x 2.0”,
allowing direct installation to the user’s end equipment for system evaluation. It uses
through-hole components for easy assembly and evaluation.

The kit is shipped with the following items:

1. TC64X/TC64XB Fan Control Demo Board

2. Demo and Evaluation Kit Software and Documentation CD, DS51306

The CDROM contains:

• Device Data Sheets

• TC64X/TC64XB Fan Control Demo Board User’s Guide, DS21401

3. Sample Devices:

Device

PDIP SOIC

TC642B TC642BEPA TC642BEOA

TC646B TC646BEPA TC646BEOA

TC647 TC647VPA TC647VOA

TC647B TC647BEPA TC647BEOA

TC648 TC648VPA TC648VOA

TC648B TC648BEPA TC648BEOA

TC649 TC649VPA TC649VOA

TC649B TC649BEPA TC649BEOA

The components that are populated on the TC64X/TC64XB Fan Control Demo Board
are listed in Table B-1 of the Appendix B section. If any component is damaged or
missing, please contact your nearest Microchip sales office, listed on the back of this
publication.

Part Number

DS21401C-page 2  2003 Microchip Technology Inc.

1.3 REFERENCE DOCUMENTS

The following is recommended reading:

• Technical Library CD-ROM, DS00161

• Analog & Interface Families Data Book 2002, DS00207

• 2002 Technical Documentation Analog & Interface Product Families CD-ROM,

DS51205

• AN768, “Redundant Fan Systems Using the TC642 Fan Manager”, DS00768,

Microchip Technology Inc., 2002

• AN770, “Linear Voltage Fan Speed Control Using Microchip’s TC64X Family”,

DS00770, Microchip Technology Inc., 2003

• AN771, “Suppressing Acoustic Noise in Pulse Width Modulation (PWM) Fan

Speed Control Systems”, DS00771, Microchip Technology Inc., 2003

• AN772, “Speed Error in Pulse Width Modulation (PWM) Fan Control Systems”,

DS00772, Microchip Technology Inc., 2003

TC642 Fan Speed Control Module for TC64X Family Sell Sheet, DS51251

Other Reference Documents may be obtained by contacting your nearest Microchip
sales office (listed on the back of this document).

The Microchip web site (www/microchip.com) also contains a wealth of documentation.
Individual data sheets, application notes, tutorials and user’s guides are all available
for easy download.

General Information

 2003 Microchip Technology Inc. DS21401C-page 3

TC64X/TC64XB Fan Control Demo Board User’s Guide

NOTES:

DS21401C-page 4  2003 Microchip Technology Inc.

TC64X/TC64XB FAN CONTROL

M

DEMO BOARD USER’S GUIDE

Chapter 2. Getting Started

This chapter describes the TC64X/TC64XB Fan Control Demo Board’s configuration,
how it functions and lists typical fan demo board operating configurations for fan
applications.

2.1 TC64X/TC64XB FAN CONTROL DEMO BOARD TYPICAL MODULE CONFIGURATIONS

2.1.1 Using Bipolar Driver Transistors

All component selections should be made based on the information provided in the
Applications section of the TC64X and TC64XB data sheets. Table 2-1 lists typical fan
module operating configurations for 12V fan applications. These are provided as a
guide only. The values in the table assume the use of low-cost, bipolar transistors, such
as 2N2222A, unless stated otherwise.

TABLE 2-1: SUGGESTED OUTPUT DRIVER/CURRENT SENSE VALUES

VS. FAN CURRENT

Full Speed

Fan Current

50 mA — X 2.4 k 9.1

100 mA — X 1.1 k 4.7

150 mA — X 750 3.0

200 mA — X 620 2.4

200 mA X — 5.6 k 2.4

250 mA X — 4.7 k 2.0

300 mA X — 3.9 k 1.8

350 mA X — 3.3 k 1.5

400 mA X — 3.0 k 1.3

450 mA X — 2.4 k 1.2

Darlington Pair

(Q

, Q2)

1

Single Transistor

(Q3)

R

(Ω)

5

R

(Ω)

6

Fan motors of 50 mA to 150 mA can be driven using the single transistor driver
configuration (i.e., Q
of 200 mA may be driven using either the single transistor or Darlington configurations.
If a single transistor is used, care must be taken to select a transistor having a minimum
h

of at least 50 to ensure the minimum output current specification (5 mA) of the

FE

TC64X and TC64XB devices is sufficient to saturate the transistor when it is conducting
the full fan current.

 2003 Microchip Technology Inc. DS21401C-page 5

installed; Q1 and Q2 not installed). Fans having a motor current

3

TC64X/TC64XB Fan Control Demo Board User’s Guide

2.1.2 Using Logic Level MOSFETS

Substituting a logic level MOSFET for Q3 (such as a BS170) results in lower system
voltage losses and significantly reduces output loading on the TC64X and TC64XB
devices. The low R
used instead of the Darlington configuration in high-current fan applications. Refer to
the Applications section of the TC64X and TC64XB data sheets for details.

Population options for single transistor output drivers (using either MOSFET or bipolar
transistor) and the two transistor (Darlington) stage are shown in Figure 2-1.

of the MOSFET (1Ω in the case of the BS170) enables it to be

DSON

C

7

Q

1

Q

3

R

5

7

R

6

C
B

E

To F an (– )

(2N2222A)

Q

3

Q

2

R

5

Reverse Orientation of

Q

C

7

Q

and Jumper R

3

Jumper

7

R

5

1

Q

3

5

R

D
G

S

Q3 (BS170)

6

Q

2

R

5

To Fa n (– )

FIGURE 2-1: Output Driver Configuration Options

2.2 SYSTEM CONNECTION FOR +5V OPERATION

Figure 2-2 shows typical wiring connections to the fan control module. The fan
operating voltage is +12V, while the fan control module operates from a supply voltage
of +5V. A NTC thermistor connects from the SENSOR input of the fan control module
to V

. Fan control module resistors R1 and R2 (See Figure A-2), in conjunction with

DD

characteristics of the NTC thermistor, determine the fan speed versus the temperature
profile of the system.

C

7

Q

R

5

7

Q

, Q2 = 2N2222A

1

C

C

B

B

E

1

Q

3

Q

1

R

Q

Q

2

6

E

2

To F a n (–)

R

5

+5V

Power Supply

+12V

GND

NTC

Thermistor

System

Shutdown

+

V

DD

SENSOR
V

AS/VMIN

FAULT

FAN(–)

GND

TC64X/TC64XB

Demo

Fan Control

Module

Fan

FIGURE 2-2: Typical Wiring Connections to Fan Module for +12V Fan and +5V Module Supply

DS21401C-page 6  2003 Microchip Technology Inc.

TC64X/TC64XB FAN CONTROL DEMO

M

Appendix A. Board Layout and Schematic

A.1 INTRODUCTION

This appendix contains general information concerning the layout, schematic and
components for the TC64X/TC64XB Fan Control Demo Board.

A.2 BOARD LAYOUT AND SCHEMATIC

Figure A-1 depicts the layout for the TC64X/TC64XB Fan Control Demo Board.
Figure A-2 shows the schematic for the TC64X/TC64XB Fan Control Module.

+

C

V

DD

SENSOR

V

AS/VMIN

FAU LT

FAN (–)

GND

1

C

C

8

C

4

C

7

+

Q

1

Q

3

Q

R

3

R

1

2

C

3

2

R

5

BOARD USER’S GUIDE

R

4

R

2

R

7

U1

R

C

6

6

Q

4

C

5

R

8

Additional pads

+

LED

in series with
I.C. pins and
board input
connections

6-32

Drill

(4)

FIGURE A-1: TC64X/TC64XB Fan Control Demo Board Layout

 2003 Microchip Technology Inc. DS21401C-page 7

TC64X/TC64XB Fan Control Demo Board User’s Guide

V

DD

Sensor

Input

C

1

FAULT

10 µF

6

R

1

R

2

C

2

0.01 µF

Test Point

1

V

IN

V

U1

8

DD

C

8

0.01 µF

VAS/V

MIN

TC64X

VAS/V

C

F

TC64XB

MIN

SENSE

GND

4

R

3

3

C

3

0.01 µF

R

4

C

2

4

7

V

OUT

5

R

5

C

6

0.1 µF

FIGURE A-2: TC64X/TC64XB Fan Control Demo Board Schematic

Q

4

2N3906

R

7

1.2 kΩ

Q

3

C

0.47 µF - 1 µF
(Optional)

Optional

7

R8
470Ω

Q

1

FAULT

LED

Q

2

FAULT

V

OUT

R

6

GND

DS21401C-page 8  2003 Microchip Technology Inc.

TC64X/TC64XB FAN CONTROL DEMO

M

BOARD USER’S GUIDE

Appendix B. Bill-of-Materials (BOM)

B.1 DEMO BOARD COMPONENTS

Table B-1 lists typical components and the associated values that comprise the
TC64X/TC64XB Fan Control Demo Board.

TABLE B-1: FAN CONTROL MODULE COMPONENTS LIST

Component Typical Value Comments

C

1

C

2

C

3

C

4

C

5

C

6

C

7

C

8

LED 10 mA Miniature LED LED lights when FAULT

, Q

Q

1

2

Q

3

Q

4

R

, R

1

2

R

, R

3

4

R

5

R

6

R

7

R

8

U

1

10 µF Radial Electrolytic
Capacitor

0.01 µF Ceramic Disk Capacitor Bypass capacitor.

0.01 µF Ceramic Disk Capacitor Bypass capacitor.

1.0 µF Ceramic Capacitor PWM capacitor. Typical value is 1.0 µF (PWM frequency of 30 Hz).

Not used —

0.1 µF Ceramic Disk Capacitor SENSE input coupling capacitor.

0.47 µF to 1 µF Radial
Electrolytic Capacitor

0.01 µF Ceramic Disk Capacitor Bypass capacitor.

2N2222A NPN Transistor Darlington pair output option. If used, Q3 location MUST be left

See Applications section of
TC64X and TC64XB data
sheets.

2N3906 (or Equivalent) PNP
Transistor

See the Applications section of
the TC64X and TC64XB data
sheets.

See the Applications section of
the TC64X and TC64XB data
sheets.

See the Applications section of
the TC64X and TC64XB data
sheets.

See Applications section of the
TC64X and TC64XB data
sheets.

1.2 kΩ, 1/4 Watt, 5% Resistor LED Drive transistor base resistor (Optional).
470Ω, 1/4 Watt, 5% Resistor LED Drive transistor series-limiting resistor (Optional).

TC642/B, TC646/B, TC647/B,
TC648/B or TC649/B Fan
Control devices

Power supply filter.

Fan acoustic noise suppression capacitor. (Optional)

output is LOW (active). (Optional)

open.

Single transistor output option. Can be bipolar transistor or logic
level MOSFET (depending on cost constraints and fan current). If
used, Q

LED Driver transistor (Optional).

Value depends on the type of sensor used and the desired fan
speed vs. temperature profile.

Value depends on the desired minimum fan speed setting
(TC642/2B, TC647/7B) or auto-shutdown temperature (TC646/6B,
TC648/8B, TC649/9B).

Base current limiting resistor. Value depends on the type of fan and
driver used. Typical values appear in Table B-1.

Fan Current sensing resistor. Value depends on full-speed fan
current. Typical values are shown in Table B-1.

and Q2 locations MUST be left open.

1

 2003 Microchip Technology Inc. DS21401C-page 9

M

W

ORLDWIDE SALES AND SERVICE

AMERICAS

Corporate Office

2355 West Chandler B lvd.
Chandler, AZ 85224-6199
Tel: [phone]
Fax: [phone]
Technical Support: 480-792-7627
Web Address: http://www.microchip.com

Atlanta

3780 Mansell Road, Suite 130
Alpharetta, GA 30022
Tel: [phone]
Fax: [phone]

Boston

2 Lan Drive, Suit e 120
Westford, MA 01886
Tel: [phone]
Fax: [phone]

Chicago

333 Pierce Road, S uite 180
Itasca, IL 60143
Tel: [phone]
Fax: [phone]

Dallas

4570 Westgrove Drive, Suite 160
Addison, TX 75001
Tel: [phone]
Fax: [phone]

Detroit

Tri-Atria Office Building
32255 Northwestern Highway, Suite 190
Farmington Hills, MI 48334
Tel: [phone]
Fax: [phone]

Kokomo

2767 S. Albright Road
Kokomo, IN 46902
Tel: [phone]
Fax: [phone]

Los Angeles

18201 Von Karman, Suite 10 90
Irvine, CA 92612
Tel: [phone]
Fax: [phone]

Phoenix

2355 West Chandler B lvd.
Chandler, AZ 85224-6199
Tel: [phone]
Fax: [phone]

San Jose

2107 North First S treet, Suite 590
San Jose, CA 95131
Tel: [phone]
Fax: [phone]

Toro nto

6285 Northam Drive, Suite 108
Mississauga, Ontario L4V 1X5, Canada
Tel: [phone]
Fax: [phone]

ASIA/PACIFIC

Australia

Suite 22, 41 Rawson Street
Epping 2121, NSW
Australia
Tel: [phone]
Fax: [phone]

China - Beijing

Unit 915
Bei Hai Wan Tai Bldg.
No. 6 Chaoyangmen Beidajie
Beijing, 100027, No. China
Tel: [phone]
Fax: [phone]

China - Chengdu

Rm. 2401-2402, 24 th Floor,
Ming Xing Financial Tower
No. 88 TIDU Street
Chengdu 610016, China
Tel: [phone]
Fax: [phone]

China - Fuzhou

Unit 28F, World Trade Plaza
No. 71 Wusi Road
Fuzhou 350001, China
Tel: [phone]
Fax: [phone]

China - Hong Kong SAR

Unit 901-6, Tower 2, Metroplaza
223 Hing Fong Ro ad
Kwai Fong, N.T., Hong Kong
Tel: [phone]
Fax: [phone]

China - Shanghai

Room 701, Bldg. B
Far East International Plaza
No. 317 Xian Xia Road
Shanghai, 200051
Tel: [phone]
Fax: [phone]

China - Shenzhen

Rm. 1812, 18/F, Building A, United Plaza
No. 5022 Binhe Roa d, Futian District
Shenzhen 518033, China
Tel: [phone]
Fax: [phone]

China - Shunde

Room 401, Hongjian Building
No. 2 Fengxiangnan Road, Ronggui Town
Shunde City, Guangdong 528303, China
Tel: [phone] Fax: [phone]

China - Qingdao

Rm. B505A, Fullhope Plaza,
No. 12 Hong Kong Central Rd.
Qingdao 266071, China
Tel: [phone] Fax: [phone]

India

Divyasree Chamb ers
1 Floor, Wing A (A3/A4)
No. 11, O’Shaugnessey Road
Bangalore, 560 025, India
Tel: [phone] Fax: [phone]

Japan

Benex S-1 6F
3-18-20, Shinyokohama
Kohoku-Ku, Yokohama-shi
Kanagawa, 222-0033, Japan
Tel: [phone] Fax: [phone]

Korea

168-1, Youngbo Bldg. 3 Floor
Samsung-Dong, Kangnam-Ku
Seoul, Korea 135-882
Tel: [phone] Fax: [phone] or
82-2-558-5934

Singapore

200 Middle Road
#07-02 Prime Cen tre
Singapore, 188980
Tel: [phone] Fax: [phone]

Taiw an

Kaohsiung Branch
30F - 1 No. 8
Min Chuan 2nd Road
Kaohsiung 806, Taiwan
Tel: [phone]
Fax: [phone]

Taiw an

Taiwan Branch
11F-3, No. 207
Tung Hua North Road
Taipei, 105, Taiwan
Tel: [phone] Fax: [phone]

EUROPE

Austria

Durisolstrasse 2
A-4600 Wels
Austria
Tel: [phone]
Fax: [phone]

Denmark

Regus Business Centre
Lautrup hoj 1-3
Ballerup DK-2750 Denmark
Tel: [phone] Fax: [phone]

France

Parc d’Activite du M oulin de Massy
43 Rue du Saule Trapu
Batiment A - ler Etage
91300 Massy, France
Tel: [phone]
Fax: [phone]

Germany

Steinheilstrasse 10
D-85737 Ismaning, Germany
Tel: [phone]
Fax: [phone]

Italy

Via Quasimodo, 12
20025 Legnano (MI)
Milan, Italy
Tel: [phone]
Fax: [phone]

Netherlands

P. A. De Biesbosch 14
NL-5152 SC Drunen, Netherlands
Tel: [phone]
Fax: [phone]

United Kingdom

505 Eskdale Road
Winnersh Triangle
Wokingham
Berkshire, England RG41 5TU
Tel: [phone]
Fax: [phone]

07/28/03

DS21401C-page 10  2003 Microchip Technology Inc.

Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

Microchip:
TC642DEMO