Verticle TV & Music

Applications of Switching Regulators

Applications of Switching Regulators

Virtually all of today's electronic systems require some form of power conversion.

The trend toward lower power, portable equipment has driven the technology and

the requirement for converting power efficiently. Switchmode power converters,

often referred to simply as "switchers", offer a versatile way of achieving this goal.

Switching regulators are small, flexible, and allow either step-up (boost)

or step-down (buck) operation.

When switcher functions are integrated and include a switch which is part of the

basic power converter topology, these ICs are called “switching regulators”. When no

switches are included in the IC, but the signal for driving an external switch is

provided, it is called a “switching regulator controller”. Sometimes - usually for

higher power levels - the control is not entirely integrated, but other functions to

enhance the flexibility of the IC are included instead. It is important to know what you aregetting in your controller, and to know if your switching regulator is really aregulator or is it just the controller function.

The primary limitations of switching regulators as compared to linear regulators are

their output noise, EMI/RFI emissions, and the proper selection of external support

components. Although switching regulators do not necessarily require transformers,

they do use inductors.

One unique advantage of switching regulators lies in their ability to convert a given

supply voltage with a known voltage range to virtually any given desired output

voltage, with no “first order” limitations on efficiency. This is true regardless of

whether the output voltage is higher or lower than the input voltage - the same or

the opposite polarity.

Switchers also offer the advantage that, since they inherently require a magnetic

element, it is often a simple matter to “tap” an extra winding onto that element and,

often with just a diode and capacitor, generate a reasonably well regulated

additional output. If more outputs are needed, more such taps can be used. Since the

tap winding requires no electrical connection, it can be isolated from other circuitry,

or made to “float” atop other voltages.

Though switchers can be designed to accommodate a range of input/output

conditions, it is generally more costly in non-isolated systems to accommodate a

requirement for both voltage step-up and step-down. So generally it is preferable to

limit the input/output ranges such that one or the other case can exist, but not both,

and then a simpler converter design can be chosen.

The concerns of minimizing power dissipation and noise as well as the design

complexity and power converter versatility set forth the limitations and challenges

for designing switchers, whether with regulators or controllers.

The ideal switching regulator performs a voltage conversion and input/output energy transfer without loss of power by the use of purely reactive components. Although an actual switching regulator does have internal losses, efficiencies can be quite high, generally greater than 80 to 90%. Conservation of energy applies, so the input power equals the output power. This says that in stepdown (buck) designs, the input current is lower than the output current. On the other hand, in step-up (boost) designs, the input current is greater than the output current. Input currents can therefore be quite high in boost applications, and this should be kept in mind, especially when generating high output voltages from batteries.

Engineering Services

About the Author

Analog Switch Ics

Deity Switcher - Another Switch to Horde!

US Auctions Australian Auctions Austrian Auctions Belgian Auctions Canadian Auctions French Auctions German Auctions Irish Auctions Italian Auctions Dutch Auctions Spanish Auctions Swiss Auctions GB Auctions

Best Match Items Ending First Newly-Listed Items First Price + Shipping: Lowest First Price + Shipping: Highest First

3 Port AUTO Hdmi Switch SWITCHER SPLITTER HUB HD 1080p Cable Support 3D $10.99 Time Remaining: 16d 12h 58m Buy It Now for only: $10.99 Buy It Now

5 Port way hub splitter switcher HDMI AUTO SWITCH $45.56 Time Remaining: 33m

3 PORT HDMI SWITCHER SPLITTER SWITCH FOR HDTV 1080P 13 $14.28 Time Remaining: 44m

5 PORT HDMI Switch Switcher Selector Hub + Remote 1080p $14.22 Time Remaining: 2d 18h 33m Buy It Now for only: $14.22 Buy It Now

3 PORT HDMI SWITCHER SPLITTER SWITCH FOR HDTV 1080P 13 $15.64 Time Remaining: 1h

NEW 5 Speaker Selector Switch Switcher Splitter200Watt $35.95 Time Remaining: 16d 2h 54m Buy It Now for only: $35.95 Buy It Now

3 Port HDMI Switcher Splitter Box Audio Switch Hub Box for HDTV Game skblw WD183 $0.95 Time Remaining: 1h 2m

3 Port AUTO HDMI SWITCH SWITCHER SPLITTER HUB HD 1080p w 15 Cable Support 3D $9.99 Time Remaining: 1h 15m

NEW10 Speaker Selector Switch Switcher Distributor 200W $35.95 Time Remaining: 16d 2h 55m Buy It Now for only: $35.95 Buy It Now

Audio Authority 1177A TOSLink Coaxial Digital Switcher Switch Automatic SPDIF $161.10 Time Remaining: 2h 5m Buy It Now for only: $179.00 Buy It Now

5 Port 1080P Video HDMI Switch Switcher Splitter for HDTV PS3 DVD with IR Remote $11.34 Time Remaining: 24d 12h 45m Buy It Now for only: $11.34 Buy It Now

Philips 4 WAY Automatic AV Selector Switcher S video HD Component Switch opened $31.99 Time Remaining: 2h 7m

5 Port 1080P Video HDMI Switch Switcher Splitter for HDTV PS3 DVD with IR Remote $10.50 (11 Bids) Time Remaining: 3h 21m

3 Port HDMI Video Selector Switch Switcher Splitter for HDTV PS3 XBOX 360 1080P $4.87 Time Remaining: 14h 8m Buy It Now for only: $4.87 Buy It Now

3 Port AUTO HDMI SWITCH SWITCHER SPLITTER HUB HD 1080p w 15 Cable Support 3D $9.99 Time Remaining: 3h 46m

NEW 4x1 Automatic HD Component Composite S Video Audio Selector Switch Switcher $24.95 Time Remaining: 2d 23h 50m Buy It Now for only: $24.95 Buy It Now

3 Port 3x1 HDMI Switcher Switch Selector Input Splitter Adapter Hub 3 In 1 Out $10.21 Time Remaining: 4h 15m Buy It Now for only: $11.66 Buy It Now

3 Port HDMI 13 Switch Switcher Splitter Selector for HDTV PS3 $6.79 Time Remaining: 18h 58m Buy It Now for only: $6.79 Buy It Now

3 Port HDMI Switcher Splitter Box Audio Switch Hub Box for HDTV Game zmmmg WD183 $0.95 Time Remaining: 4h 35m

3 Port HDMI Switcher Splitter Box Audio Switch Hub Box for HDTV Game itnoj WD183 $0.95 Time Remaining: 5h 28m

HDMI Switch Switcher Splitter 3 Port in 1 1080P For PS3 HDTV DVD + IR Remoter $10.89 Time Remaining: 20h 5m Buy It Now for only: $10.89 Buy It Now

3 PORT HDMI SWITCHER SPLITTER SWITCH FOR HDTV 1080P 13 $15.64 Time Remaining: 5h 37m

3 to 1 Audio Video AV Switch Switcher Splitter+RCA Cable 3 Feet $3.99 Time Remaining: 25d 4h 8m Buy It Now for only: $3.99 Buy It Now

3 Port AUTO HDMI SWITCH SWITCHER SPLITTER HUB HD 1080p w 15 Cable Support 3D $9.99 Time Remaining: 5h 45m

3 Port 3x1 HDMI Switcher Switch Selector Input Splitter Adapter Hub 3D +Remote $14.99 Time Remaining: 5h 45m Buy It Now for only: $16.50 Buy It Now

3 to 1 HDMI Mini Switch Switcher Splitter Box With Remote 13 For 1080P $12.99 Time Remaining: 22d 1h 42m Buy It Now for only: $12.99 Buy It Now

3 Port HDMI Switcher Splitter Box Audio Switch Hub Box for HDTV Game zbmoh WD183 $0.95 Time Remaining: 5h 54m

3 Port HDMI 3x1 Switch Switcher 3D 1080P IR Remote 5 4 $10.25 Time Remaining: 4d 20h 42m Buy It Now for only: $10.25 Buy It Now

5 Port 5x1 HDMI Switch Switcher Selector Splitter 5In1Out Support 3D +Remote $16.52 Time Remaining: 6h 15m Buy It Now for only: $18.18 Buy It Now

3 Port HDMI Switcher Splitter Box Audio Switch Hub Box for HDTV Game dvwvo WD183 $0.95 Time Remaining: 6h 38m

3 Port HDMI Switch Switcher Selector for HDTV PS3 $6.65 Time Remaining: 20d 19h 56m Buy It Now for only: $6.65 Buy It Now

3 Port 3x1 HDMI Switcher Switch Selector Input Splitter Adapter Hub 3 In 1 Out $10.50 Time Remaining: 7h 15m Buy It Now for only: $11.99 Buy It Now

3 port Audio Video AV RCA Switch Switcher Splitter+Cabe $4.19 Time Remaining: 2d 20h 24m Buy It Now for only: $4.19 Buy It Now

3 Port HDMI Switcher Splitter Box Audio Switch Hub Box for HDTV Game pzauw WD183 $0.95 Time Remaining: 7h 34m

3 Ports 1080P Video HDMI Switch Switcher Splitter for HDTV PS3 DVD + IR Remoter $10.99 Time Remaining: 17d 18h 44m Buy It Now for only: $10.99 Buy It Now

3 Port AUTO HDMI SWITCH SWITCHER SPLITTER HUB HD 1080p w 15 Cable Support 3D $9.99 Time Remaining: 7h 45m

3 Port HDMI Switcher Splitter Box Audio Switch Hub Box for HDTV Game ikrrn WD183 $0.95 Time Remaining: 7h 58m

5 Port HDMI Switch Switcher Splitter w Remote f HDTV PS3 $12.99 Time Remaining: 10d 14h 14m Buy It Now for only: $12.99 Buy It Now

3 Port HDMI Switcher Splitter Box Audio Switch Hub Box for HDTV Game sgbre WD183 $0.95 Time Remaining: 8h 43m

3 Port AUTO HDMI SWITCH SWITCHER SPLITTER HUB HD 1080p w 15 Cable Support 3D $9.99 Time Remaining: 9d 14h 33m Buy It Now for only: $9.99 Buy It Now

3 Port HDMI Switcher Splitter Box Audio Switch Hub Box for HDTV Game HOT WD183 $0.95 Time Remaining: 9h 13m

3 Port AUTO HDMI SWITCH SWITCHER SPLITTER HUB HD 1080p w 15 Cable Support 3D $9.99 Time Remaining: 9h 15m

NEW 2 Way Pair 4 Speaker Selector Switch Box Switcher $24.95 Time Remaining: 28d 8h 5m Buy It Now for only: $24.95 Buy It Now

3 Port 3x1 HDMI Switcher Switch Selector Input Splitter Adapter Hub 3D +Remote $14.58 Time Remaining: 9h 45m Buy It Now for only: $16.05 Buy It Now

3 Port 1080P HDMI Switch Switcher Splitter for HDTV PS3 DVD $4.79 Time Remaining: 24d 10h 10m Buy It Now for only: $4.79 Buy It Now

3 Port HDMI Switcher Splitter Box Audio Switch Hub Box for HDTV Game blohr WD183 $0.95 Time Remaining: 9h 51m

3 Port 3x1 HDMI Switcher Switch Selector Input Splitter Adapter Hub 3 In 1 Out $10.50 Time Remaining: 10h 15m Buy It Now for only: $11.99 Buy It Now

3 Port 1080P Video HDMI Switch Switcher Splitter for HDTV PS3 DVD with IR Remote $9.25 Time Remaining: 24d 3h 56m Buy It Now for only: $9.25 Buy It Now

3 Port HDMI 3D Ultra Mini Intelligent Switch Switcher Selector Adapter 3x1 3D $7.93 Time Remaining: 10h 42m

4X2 HDMI True 3D Matrix Switch Switcher 4 input source x 2 display IR remote $65.00 Time Remaining: 2d 15h 59m Buy It Now for only: $65.00 Buy It Now

3 Port AUTO HDMI SWITCH SWITCHER SPLITTER HUB HD 1080p w 15 Cable Support 3D $9.99 Time Remaining: 10h 45m

Ultra High Performance HDMI Switcher, 3to1 Switch List Price: $59.95 Sale Price: $12.38 You save: $47.57 (79%)   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description HDMI 3 Ports Switch with Remote (3X1). This is a kind of high performance mini HDMI Switcher. It is compatible well for HD-DVD, STV,PS3, Xbox36etc. The multiple resolutions is can be up to 1080p. This kind of the HDMI Amplifier Switcher not only has the key-press-switching function, but also has the IR remote control and intelligent function...

3 Way Audio Video AV RCA Switch Switcher Splitter Sale Price: $8.95   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description Simple, intuitive design. An audio/video manual switching device that protects your valuable cables and device connections because it allows sharing one TV with 3 different signal sources. Extremely lightweight for portability...

Recoton Digital Audio Selector Switch List Price: $25.99 Sale Price: $14.99 You save: $11.00 (42%)   Eligible for free shipping! Availability: Usually ships in 24 hours See Reviews For This Product Description switch is very easy to use

5 Port Smart HDMI Switch (Auto switch among 5 input sources, IR remote and AC Adapter included) List Price: $49.95 Sale Price: $20.36 You save: $29.59 (59%)   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description HDMI 5 Ports Switcher w/Remote (5X1) This is a kind of high performance mini HDMI Amplifier Switcher. This kind HDMI Amplifier Switcher not only has the key-press-switching function, but also has the IR remote control and intelligent function...

New 4 Input 1 Output Switch AV Audio Video S-VIDEO Selector Switcher w/ FREE Cable for XBox, XBOX 360, PS1, PS2, PS3, Gamecube, Wii, DVD, VCR Sale Price: $10.00 See Reviews For This Product Description 100% Brand New. 4 group AV Audio Video S-VIDEO Selector Switcher with Cable. you may switch 4-group AV audio-video signal input and 1-group output to the television.DVD, VCD, TV Game, VCR station selector, satellite TV, cameras, etc.

Toslink 3 x 1 Optical Audio Bi-Directional Switch - by Abacus24-7 List Price: $20.99 Sale Price: $6.49 You save: $14.50 (69%)   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description Toslink 3 x 1 Optical Audio Bi-Directional Switch - by Abacus24-7. This switch lets you connect up to 3 different optical digital components to a componentwith only one toslink input. - 30 Day Money Back Guarantee...

Plantronics MX10 Universal Amplifier for Headsets List Price: $149.99 Sale Price: $83.24 You save: $66.75 (45%)   Eligible for free shipping! Availability: Usually ships in 24 hours See Reviews For This Product Description MODEL- MX10 VENDOR- PLANTRONICS FEATURES- MX10 Universal Amplifier The MX10 connects a single headset to a telephone and a PC...

3-pack Wireless Remote Control Outlet Switch 1200 watt 100 Feet List Price: $31.99 Sale Price: $15.52 You save: $16.47 (51%)   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description Ideal for the remote operation of many electrical devices, including lamps, appliances, tools and more. It even works outside! With one 12-volt (Model 23A, not included) battery for the remote you are ready to go!

Perko 8501DP Marine Battery Selector Switch List Price: $41.15 Sale Price: $29.45 You save: $11.70 (28%)   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description Battery Selector Switch - Switch - For use with two or more batteries and single or dual engine systems. They permit selection between batteries for starting and charging or operation of both batteries in parallel...

4X4 True Matrix HDMI 1.3a Powered Switch w/ Remote Controller (Rev. 3.0) Sale Price: $199.99   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description 4X4 True Matrix HDMI 1.3a Powered Switch w/ Remote Controller (Rev. 3.0) Make the HDX-404E the heart of any truely complex and impressive home theater system. The HDX-404E features 4 inputs and 4 independently assignable outputs giving you true flexibility and the ability to have various media playing on different screen...