Radio Shack 43-222B Manual de usuario descargar pdf (Pagina 15)

US

8,212,386

B2

1

POWER

SUPPLY

SYSTEM

CROSS-REFERENCES

TO

RELATED

APPLICATIONS

This

application

is

a

divisional

of

US.

patent

application

Ser.

No.

11/690,068,

?led

Mar.

22,

2007,

Which

is

a

non

provisional

of

and

claims

the

bene?t

of

the

?ling

date

of

US.

Provisional

Patent

Application

No.

60/796,1

17,

?led

on

Apr.

28,

2006,

Which

are

herein

incorporated

by

reference

in

their

entirety

for

all

purposes.

BACKGROUND

OF

THE

INVENTION

Today,

various

electronic

devices

exist.

Such

electronic

devices include

cellular

phones,

portable

computers,

MP3

players,

personal

digital

assistants

(PDAs),

etc.

A

person

may

oWn

one

or

all

of such

portable

electronic

devices

and

each

portable

electronic

device

may

have

a separate

poWer

supply

system

associated

With

it.

The

use

of

many

different

poWer

supplies

is

not

desirable,

since

poWer

supplies

(sometimes

called

“poWer

bricks”)

are

often

very

bulky

and

cumbersome.

For

example,

if

a

person

oWns

a

portable

computer,

a

cellular

phone,

and

an

MP3

player,

that

person

Would

also

oWn

three

portable

poWer

supplies

for

those

three

portable

electronic

devices.

If

that

person

is

traveling,

it

is

quite

cumbersome

for

that

person

to

carry

all

of

those

portable

poWer

supplies

With

him.

In

response

to

this

need,

some

have

developed

“universal”

poWer

supplies.

One

such

poWer

supply

is

described

in

US.

Pat.

No.

5,838,554.

This

patent

describes

the

use

ofa

single

poWer

adapter

for

use

With

a

plurality

of

different

tips

Which

can

connect

to

different

types

of

portable

electronic

devices.

Each

tip

includes

a

different

electrical

component

in

it.

In

use,

a

tip

is

connected

to

the

poWer

adapter.

The

circuitry

in

the

poWer

adapter

senses

the

electrical

component

in

the

tip

and

a

feedback

signal

is

provided

to

poWer

circuitry

containing

a

programmed

IC

chip.

The

poWer

circuitry,

in

turn,

provides

a

?rst

output

voltage.

If

a

second

tip

With

a

different

electrical

component

is

selected,

a

different

feedback

signal

is

sent

to

the

poWer

circuitry

and

the

poWer

circuitry

then

produces

a

second

output

voltage

associated

With

the

second

tip.

Although

systems

like

the

one

described

in

US.

Pat.

No.

5,838,554

are

effective

in

some

instances,

they

could

be

improved.

For

example,

the

feedback

circuitry

that

is

used

in

such

systems

is

complex

and

is

relatively

expensive

to

pro

duce.

The

use

of

the

above-described

IC

chip

increases

the

cost

of

such

poWer

supplies.

What

is

desired

is

a

simpler,

more

cost

effective

universal

poWer

supply

solution.

Embodiments

of

the

invention

address

these

and

other

problems,

collectively

and

individually.

SUMMARY

OF

THE

INVENTION

Embodiments

of

the

invention

are

directed

to

poWer

supply

systems

and

methods

for

using

poWer

supply

systems.

One

embodiment

of

the

invention

is

directed

to

a

poWer

supply

system

comprising

a

poWer

circuit

comprising

a

sWitch

and

adapted

to

generate

a

?rst

output

voltage

or

a

second

output

voltage,

depending

on

the

state

of

the

sWitch

(e.g.,

a

slide

sWitch,

a

push

button,

etc.).

It

also

includes

an

output

connector

coupled

to

the

poWer

circuit,

Where

the

output

connector

includes

a

plurality

of

electrical

contacts

comprising

a

?rst

electrical

contact

and

a

second

electrical

contact.

A

voltage

output

indicator

device

is

coupled

to

the

?rst

and

second

electrical

contacts.

The

voltage

output

indi

cator

device

indicates

that

the

poWer

circuit

is

producing

the

10

20

25

30

35

40

50

55

65

2

?rst

output

voltage

or the

second

output

voltage,

so

that

the

user

is

aWare

of

the

voltage

being

output

by

the

poWer

supply

system.

Another

embodiment

of

the

invention

is

directed

to

a

poWer

supply

system

comprising

a

poWer

circuit

comprising

a

sWitch

(e.g.,

a

slide

sWitch,

a

push

button,

etc.).

The

poWer

supply

is

adapted

to

generate

a

?rst

output

voltage

and

a

second

output

voltage

depending

on

a

state

of

the

sWitch.

An

output

connector

is

coupled

to

the

poWer

circuit.

The

output

connector

includes

a

plurality

of

electrical

contacts

including

a

?rst

set

of

contacts

adapted

to

provide

the

?rst

output

volt

age

and

a

second

set

of

electrical

contacts

adapted

to

provide

the

second

output

voltage.

The

?rst

and

second

sets

of

con

tacts

are

different.

Another

embodiment

of

the

invention

is

directed

to

a

poWer

supply

system

comprising

a

poWer

circuit

adapted

to

generate

a

?rst

output

voltage

and

a

second

output

voltage

at

the

same

time.

An

output

connector

is

coupled

to

the

poWer

circuit.

The

output

connector

includes

a

plurality

of

electrical

contacts

including

a

?rst

set

of

contacts

adapted

to

provide

the

?rst

output

voltage

and

a

second

set

of

electrical

contacts

adapted

to

provide

the

second

output

voltage

at

the

same

time

as

the

?rst

output

voltage.

The

?rst

and

second

sets

of

contacts

are

different.

The

?rst

connector

can be

con?gured

to

connect

to

the

output

connector

and

can

electrically

couple

to

the

?rst

set

of

contacts

to

provide

the

?rst

output

voltage

to

a

?rst

elec

tronic

device.

Alternatively,

a

second

connector

can

be

con

?gured

to

connect

to

the

output

connector

and

electrically

couple

to

the

second

set

of

contacts

to

provide

the

second

output

voltage

to

a

second

electronic

device.

Other

embodiments

of

the

invention

are

directed

to

meth

ods

such

as

methods

for

using

such

poWer

supply

systems.

These

and

other

embodiments

of

the

invention

are

described

in

further

detail

beloW.

BRIEF

DESCRIPTION

OF

THE

DRAWINGS

FIG.

1(a)

shoWs

a

perspective

vieW

of

a

poWer

supply

system

according

to

an

embodiment

of

the

invention.

FIG.

1(b)

shoWs

connection

apparatus

including

an

input

connector.

FIGS.

2(a)-2(c)

shoW

perspective

vieWs

of

connector

tips

according

to

embodiments

of

the

invention.

FIGS.

2(b)

and

2(0)

shoW

invisible

lines

shoWing

electrical

contacts

that

are

capable

of

coupling

to electrical

contacts

in

a

common

output

connector.

FIGS.

3(a)-3

(b)

shoW

end

vieWs

of

connector

tips,

shoWing

different

contacts.

FIG.

4

shoWs

a

block

diagram

of

a

poWer

circuit

for

anAC

to

DC

converter.

FIG.

5

shoWs

a

block

diagram

of

a

poWer

circuit

for

a

DC

to

DC

converter.

FIG.

6(a)

shoWs

a

block

diagram

of

a

poWer

circuit

accord

ing

to

another

embodiment

of

the

invention.

FIGS.

6(b)

and

6(0)

respectively

shoW

schematic

diagrams

of

?rst

and

second

connectors

and

a

portion

of

the

circuit

shoWn

in

FIG.

6(a).

FIG.

7(a)

shoWs

a

block

diagram

of

another

poWer

circuit

and

an

output

connector.

FIGS.

7(b)

and

7(0)

shoW

schematic

diagrams

of

?rst

and

second

connectors

according

to

another

embodiment

of

the

invention.

FIG.

7(d)

shoWs

a

poWer

circuit

according

to

an

embodi

ment

of

the

invention.

FIGS.

8(a)

and

8(b)

respectively

shoW

top

perspective

and

bottom

perspective

vieWs of

a

poWer

adapter

according

to

an

embodiment

of

the

invention.

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