TC642EV Datasheet TC642EV | P13-P15

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TC64X/TC64XB FAN CONTROL

EVALUATION BOARD USER’S GUIDE

 2003 Microchip Technology Inc. DS21403C-page 9

Appendix A. Board Layout and Schematic

A.1 INTRODUCTION

This appendix contains general information concerning the layout, schematic and

components associated with the TC64X/TC64XB Fan Control Evaluation Board.

A.2 BOARD LAYOUT AND SCHEMATICS

Figure A-1 depicts the layout for the TC64X/TC64XB Fan Control Evaluation Board.

Figure A-2 shows the schematic for the Fan Control Module.

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

BP

1

U1

TC64X

TC642EV

TC642 TC646

V

DD

FAN

FAN -

Pot 1

SHDN/RESET

FAULT

JB

4

TP

7

TB

4

REF1

INT

EXT

TO-220

TO-92

SOT-23

Q

3

Q

2

Q

1

BP

2

BP

3

JB

1

Cpwm

JB3

JB

2

Csense

C

3

C

8

C

2

Q

4

R

1

R

4

R

3

R

5

R

2

C

1

C

4

C

5

C

7

V

IN

V

IN

GND

C

6

Pot 2

+

V

MIN

/V

AS

V

MIN

GND

TC55

V

DD

GND

V

DD

V

DD

GND

V

MIN

TP

1

V

IN

TP

5

+

_

R

SENSE

V

OUT

SENSE

R

SENSE

TP

6

TP

4

TP

2

TP

3

/FAULT

TC64XB

TC64X/TC64XB Fan Control Evaluation Board User’s Guide

DS21403C-page 10  2003 Microchip Technology Inc.

FIGURE A-2: Fan Control Module Schematic

FAULT

SENSE

Ext

SHDN/

RESET

TB

4

SHDN/

RESET

GND

V

DD

V

DD

V

DD

V

DD

8

1

3

4

2

5

7

6

V

IN

V

MIN

(V

AS

)

V

OUT

C

1

*

1µF

C

3

1µF

C

6

0.01 µF

C

7

0.01 µF

TP

5

TP

7

Int

Pot 1

(Speed Control)

Potentiometer 2

(Min Speed/

Shutdown Level)

Ext

External

Sensor

Input

Ref1

Reg1

C

F

TC64X/TC64XB

TO-220

FAN

BP3

VFan

BP2

GND

BP1

V

DD

TO-92

2N2222A*

C

8

4.7 µF

+

R

2

*

1.1 kΩ

SOT-23

1

2

TC642

TC646

3

4

JB

1

JB

4

TP

1

34

1

2

JB

3

TP

4

TP

6

C

4

C

5

*,0.1 µF

TP

3

TP

2

C

E

B

V

DD

V

DD

IN

GND

OUT

TC55

34

1

2

JB

2

R

4

R

3

*

4.7Ω

R

5

30 kΩ

R

1

620Ω

FAULT

Q

4

2N3906

* Indicates normal value.

Dashed line = factory setting.

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TC64X/TC64XB FAN CONTROL

EVALUATION BOARD USER’S GUIDE

 2003 Microchip Technology Inc. DS21403C-page 11

Appendix B. Bill-of-Materials (BOM)

B.1 TC64X/TC64XB FAN CONTROL EVALUATION BOARD COMPONENTS

Table B-1 lists typical components and associated values that comprise the

TC64X/TC64XB Fan Control Evaluation Board.

TABLE B-1: FAN CONTROL MODULE COMPONENTS

Component Typical Value

BP1 – BP3 Banana receptacle

C

1

1 µF tantalum capacitor.

C

2

Not installed

C

3

1 µF tantalum capacitor

C

4

Not installed

C

5

0.1 µF ceramic capacitor

C

6

, C

7

0.01 µF ceramic capacitor

C

8

4.7 µF tantalum capacitor

JB

1

– JB

4

SIP header terminal strips

LED -1 Miniature LED

Pot 1, Pot 2 1 kΩ, on-board potentiometer

Q

1

Not installed (SOT-23 site)

Q

2

2N2222A NPN bipolar transistor

Q

3

Not installed (TO-220 site)

Q

4

2N3906 PNP bipolar transistor

R

1

620Ω, 1/4 watt, 5% carbon resistor

R

2

1.1 kΩ, 1/4 watt, 5% carbon resistor

R

3

4.7Ω, 1/4 watt, 5% carbon resistor

R

4

Not installed

R

5

30 kΩ, 1/4 watt, 5% carbon resistor

REF-1 LM385, 1.2V reference

REG-1 TC55RP3002EZB 3.0V, 2% regulator

SW-1 Miniature SPDT toggle switch (INT/EXT Switch)

SW-2 Miniature SPDT push button switch (SHDN/RESET switch)

U1 TC642B, TC646B, TC647/7B, TC648/8B, TC649/9B (Two, each provided as

samples)

TC642EV

TC642EV

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