The µPDF, F, F, F, F, F, and F are the products .. Always connect the IC (Internally Connected) pin to VSS directly. Description: IC-POS VR,12V,1A , , , , (NAP-IC), , AP, AP(VR), , A, A(VR). 20 x L Voltage Regulator IC + 12V A – ST USA SELLER Free 5 pcsPositive 12 Volt Regulator amp TO – L LM USA.
|Published (Last):||7 February 2005|
|PDF File Size:||14.78 Mb|
|ePub File Size:||9.50 Mb|
|Price:||Free* [*Free Regsitration Required]|
Forums New posts Search forums. Media New media New comments Search media. Articles Top Articles Search resources.
IC Voltage Regulators
Welcome to our site! Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register.
The 5A delivered to the load has to go through the pass transistor. Each volt of difference between the input voltage lc the regulator and the 12V output represents 5 Watts of heat which must be removed.
L7805 5V Reg IC
The best way to do that is with surface area and fluid flow, thus the heat sink. If you wanted to build a switching regulator you would have more of 87012 chance, since they are 80 to 90 percent efficient. CheapSlider Member May 24, No matter how many pass transistors, you will still be dissipating the same amount of heat. You haven’t said what the PSU is for?
How well regulated does the output need to be? I would looking at modifying an old 12V car battery charger – these usually give about 15 volts at around 4 to 6 amps which is ideal for making a 12v PSU.
Its cheaper to buy a battery charger than a 50 or 60W transformer. You also get a rectifier and a case.
The other alternative is a switcher, Could you use an PSU from an old computer? Hero Banned May 24, Hero iv, may be you can help me with this informationplease since you were the one who led me to the link.
Hero Banned 780112 27, Also take in to account the thermal resistance of the MOSFET juncion to case and any insulators between the case and the heat sink just add them all together. You want the MOSFET junction to remain below the maximum operating temperature when dissipating 7W at the highest ambient temperature that you want to operate your design in.
Most audio amplifiers reject mains hum that is from the power supply so that they don’t need a regulator. Mains hum is usually picked up if unshielded input oc are used. Shielded audio cable should always be used for feeding a signal to an amplifier. Hero Banned May 28, Short the input snd if the hum goes away then it is probably mains hum picked up by unshielded input wires.
1/ic+ datasheet & applicatoin notes – Datasheet Archive