Regulated Power Supply / Switching Power Supply

[Fulcrum]

Whats the difference between a regulated power supply and a switching power supply?

The adapter (6v 800mA) of our cordless phone was recently submerged in the flood, what type should i get?

Thanks 

[RiDdLeR???]

Its better to get a regulated one.  A switching type is also a regulated power supply.

[kalansing]

Dect ba? meron akong nakitang 2 ang volt supply, parang 11v/6v. pero simple wall wart type lang.

[Vhangell]

yung switching types, yun yung mas maliliit at walang mabigat/malaking transformer... mostly regulated ang switching powersupplies..

[sirjon]

Whats the difference between a regulated power supply and a switching power supply?

The adapter (6v 800mA) of our cordless phone was recently submerged in the flood, what type should i get?

Thanks 

Baka ibig mo sabihin, conventional power supply sa SMPS (Switching mode Power Supply)? Marami pagkakaiba. Una, kadalasan SMPS autovolt na, pwede sa 110v or 220v .AC inputs. Second, energy saver, mababa lang ang power consumption (wattage) ng SMPS. Third, bulky conventional, malalaki pa xformer ginagamit at fourth, mas marami discrete components SMPS 

[glutnix_neo]

unfotunately, di ganon kaganda regulation ng SMPS chargers, pero di naman kasi required for chargers,

kelangan lang eh naglilimit ng current at hindi lumalampas ng sobra ang voltage

[sirjon]

unfotunately, di ganon kaganda regulation ng SMPS chargers, pero di naman kasi required for chargers,

kelangan lang eh naglilimit ng current at hindi lumalampas ng sobra ang voltage

Agree ako. Kung low current, low voltage lang, ordinary stepdown xformer, rectifier module (4diode in 1), a filter capacitor and three-pin regulator ic (LM78XX series) ok na.

[TinTopHack]

Whats the difference between a regulated power supply and a switching power supply?

The adapter (6v 800mA) of our cordless phone was recently submerged in the flood, what type should i get?

Thanks 

Linawin lang natin ang sagot kasi mukhang na confused ang thread starter. Pls. note this is not a comprehensive explanation. Its aim is to point the curious ones in the right direction. Then they are encourage to dig deeper, read more to learn more.

There are 2 types of power supplies based on output regulation (whether regulated or not)
1. unregulated - With this type the output voltage varies when the load varies. The output voltage drops when the load is increased and rise when the load is decreased. In most applications like adapters for cordless phones, desktop phones, some models of scanners, this type of supply is fine because if tight voltage regulation is required these devices have built-in regulators. This means for your cordless phone adapter unless the original is regulated, there is no need for your replace it with a regulated adapter.

2. Regulated - This type of power supply has a control circuit that regulates the voltage - keeps it constant even if the load varies. Generally regulated power supplies are more expensive that unregulated power supplies of the same capacity due to the added control circuits added. The regulation technique can be linear or switch mode.

Based on how the output is generated and regulated there are generally two types:
1. linear power supplies - This one used low freg transformers (50/60hz) to step down the 220VAC to low voltages needed such as 6V, 9V, 12 etc. These voltages are then rectified (converted to DC) and if necessary regulated using linear regulators. Linear regulators are those which usually use a transistor in series with the output to drop the DC input voltage to a regulated value. For example to get a 12V regulated output, the input Dc voltage from the rectifier must be higher than 12V - usually 3V or more higher (meaning 15V or more input) - because the transistor in series (called series pass transistor) is used as an automatically controlled variable resistor that creates the necessary voltage drop to generate 12V from an input of 15v or more.

2. switching power supplies - This one generally converts the high voltage AC input to Dc first then uses bipolar transistors or preferably mosfets to switch the DC on and off (sometimes called chopping action) to generate high frequency AC (50KHz to 1Mhz depending on the design and the magnetic components used). With the AC now at high frequency, it is now possible to use special magnetic (ferrites) cores for the transformer and fewer winding turns resulting in very small yet powerful transformers. For these reason switch mode power supplies are smaller and lighter and more efficient. The small transformer operating a high freq is now use to step down the voltage to the required value. Regulation is achieve using PWM (pulse with modulation) techniques. But sometimes some secondary voltages are also regulated using linear regulator ICs.  In others, magnetic amplifiers which also uses switching techniques are used to regulate secondary voltages.

[sirjon]

TinTopHack, WELL EXPLAINED. Di ko alam kung authorized ako to give you a point, +1, if ever.

[TIPmel]

@TinTopHack, thanks!

[TinTopHack]

You are all welcome. I am glad to be of help.

[orensomiL'',]

pwede poh ba magtanong?, ano poh ba yong regulated dpower supply? ano poh ba pinag kaiba nyan sa ibang power supply? at para san ba gagamitin at kung kailan ba dapat gamitin ang regulated power supply?

i need ur info. thank u in advance

[rdpzycho]

from TinTopHack's post above:

2. Regulated - This type of power supply has a control circuit that regulates the voltage - keeps it constant even if the load varies. Generally regulated power supplies are more expensive that unregulated power supplies of the same capacity due to the added control circuits added. The regulation technique can be linear or switch mode.

kailangan siya kung halimbawang kailangan ng circuit mo ay constant ang voltage supply.

[orensomiL'',]

ahm pwede poh bang gawing regulated yong unregulated na power supply using another electronic component?

[rdpzycho]

yup. they are called regulators. pwedeng single IC package or buong circuit 'yung regulator like switching supplies.

[orensomiL'',]

IC lang poh ba yong pwede? wala na bang ibang electronics components na pwedeng gamitin, kasi yong samin mai nag advise na gamitan daw namin ng transistor or lagyan daw para maigng regulated siya, hindi ko lang alam kung anong transistor yon.

[rdpzycho]

depende sa circuit design. kung transistor na series pass, kailangan pa rin ng voltage comparison.

[orensomiL'',]

ahh, uk, salamat poh sa info

[sirjon]

Pag-aralan mo muna basics. Basa-basa ka libro.
1) Una, aralin mo how to step down the 220volts AC line galing sa outlet ng bahay natin into lower voltage, example, into 12volts AC, gamit ang "step-down transformer"
2) Tapos converting AC voltage into Pulsating DC voltage, gamit "RECTIFIER". Tatlo naiisip kong 
    klase (o type ng rectifiers)A)Half-Wave Rectifier, using single diode B) Full-Wave Rectifier
    Center-tapped, using 2 diodes and a special type na transformer na me center tap
    C)Full-WAve, Bridged Type, 4 na diode gamit - trabaho nito. i-convert ac current into
    dc-current (pero di pa pure DC)
3) Tapos ipi-filter ng 1 mataas na capacitance na electrolytic capacitor, para maging pure dc
    voltage.

4) Bago ire-regulate na. Basic yung rectifier-filter combination sa lahat ng electronic circuitry
    kapag 'de-kuryente' (sinasaksak sa 220v ac outlet), ang gamit... Hope it can help

[Accessories]

Pwede ring gamitin LM317 as adjustable regulated power supply. Pwede ring gawing fixed regulator. Marami ng circuits nyan sa mga electronics book. Ang mga SMPS ngayon ay autovolts na. Kahit mga charger din ay autovolts din.