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12VDC to 37V DC converter by SG3524

12VDC to 37V DC converter by SG3524
Hello there!! How are you doing?
When my friend of I wants DC to DC converter circuit +37V GND -37V sizes use an automobile s have Voltage 12VDC. By he takes this circuit goes to Power Supply with , Mosfet Power Amplifier 100W RMS. A hand sees 12VDC to 37V DC converter Circuit this. Will use prominent equipment interesting be IC SG3524 (Regulating Pulse-Width Modulators) Then be usable easy and convenient. Besides still power mosfet number BUZ11 6 amounts are perform drive a pot modifies the Secretariat of the Senate runs away to give electric tall many power. The detail is other see in circuit picture sir. Hope you guys had a great weekend.
View IC-SG3524

source: http://www.geocities.com/pa_schematics/SMPS.html

Be the first to comment - What do you think? Posted by admin - July 28, 2008 at 3:31 pm

Categories: DC converter, Switching power supply Tags: 12V, dc to dc converter step up voltage, SG3524, switch mode power supply

12V jacking up the 7805 Regulator

The output voltage of a supply can be increased by “jacking up” the voltage produced by the 7805. The way the 7805 works is this: It maintains a voltage of 5v between output and common terminal. If the voltage on the common terminal is increased (jacked up), the output voltage will be 5v higher. The 7805 always maintains 5v between output and common. The circuit below produces an output of 12v.

Read More Source:http://www.talkingelectronics.com/te_interactive_index.html
Thank you.

Be the first to comment - What do you think? Posted by admin - March 8, 2008 at 1:17 pm

Categories: Power supply Tags: 12V, 7805, dc voltage regulator

Dual Power Supply +8V /-8V , +12V / -12V

Every electronic gadget primarily needs a D.C, power supply to energise it. It also forms the basic requirement for any constructional project. consequently there is a need to obtain multiple voltage values for cost reduction, convenience and compact arrangement for all the above applications.

The required D.C. power supply is usually obtained by means of a transformer. It is also possible to have transformerÂless power supplies. Though the elimination of the transformer makes the circuit compact, economical and simple, also facilitating quick assembly and built in short circuit protection, certain drawbacks creep in. These power supplies are useful only for low current applications. Special safety precautions ? are to be followed while using them. Physical contact should be strictly avoided, since the output terminals are not isolated from A.C. mains supply.

This obviously necessitates the use of a transformer. By suitable modification it is possible to obtain multiple/ fractional dual voltages from a transformer. Different not-so obvious voltage values can also be obtained from the transformer by rectification circuits. The output so obtained from a transformer secondary is unregulated. For good load regulation, the internal impedance of any power supply should be as low as possible. The regulation can be improved either by resistor zener method or series regulator method.

However, the three-terminal regulators greatly simplify the power regulation problem. These regulators need no external components. They employ internal current limiting and thermal shutdown which make them tough. For simplicity, compactness, convenience and accuracy the use of threeÂ terminal regulators is ideal. These IC voltage regulators are freely available in various ranges both positive and negative. A functional schematic of a three terminal regulator is shown in the datasheet. It can be seen that the device is a complete regulator, with built-in reference, error amplifier, series pass transistor and protection circuits. The protection circuits include current limiting, safe area protection to limit dissipation in the series pass transistor and thermal shut down to limit temperature.

Low power IC voltage regulators of the 78L series used in our measuring instrument are now so cheap that they represent an economic alternative to simple zener-npn stabilisers. In addition they offer the advantages of better regulation, current limiting/short circuit protection at 1000 mA and thermal shunt down in the event of excessive power dissipation. In fact, virtually the only way in which these regulators can be damaged is by incorrect polarity or by an excessive input voltage. Regulators in the 78L series upto the 8v type will withstand input voltages upto about 35v, whilst the 24v type will withstand 40v. Normally, of course, the regulators would not be operated with such a large input-output differential as this would lead to excess power dissipation. All the regulators in the 78L series will deliver a maximum current of 1000mA provided the input-Âoutput voltage differential does not exceed 7v. Otherwise excessive power dissipation will result, causing thermal
shutdown.