Dual Output Power Supply | Electronic Project Circuits

Posts Tagged ‘dual output power supply’

Dual linear regulator +15V -15V by Transistor Only

When friends want Dual Regulator +15V GND -15V. Usual like to to use the integrated circuit LM7815 and LM7915. But sometimes seek the integrated circuit no will do ? Today I leads old circuit , but be worthy give friends. Try out the one choice use the transistor and Zener Diode 15V can use be Dual Regulator +15V GND -15V get also. Although complicated more but economize and seek easy equipment certainly. For equipment other list friends can seek pay back can. such as Q1 2N4053 use the number BD140 can replace Q2 – 2N3446 use the number BD139 can replace. Seek buy easy and the price is inexpensive. Request friends have fun Dual linear regulator +15V -15V Circuit , please yes.

Be the first to comment - What do you think? Posted by admin - September 5, 2008 at 5:17 pm

Categories: Power supply Tags: 15V voltage Regulator, dc power supply, dual output power supply, lab power supply

5VDC to +12V and -12V Isolated dual Switching Regulator with LM2587

This circuit Dc converter step up voltage, For 5VDC to +12V and -12V Isolated dual Switching Regulator by IC LM2587-12V.
Voltage supply input 4V to 6V, Output current 0.3A.
Detail other see in circuit.

Detail IC LM2587

SIMPLE SWITCHER 5A Flyback Regulator

The LM2587 series of regulators are monolithic integrated circuits specifically designed for flyback, step-up (boost), and forward converter applications.

Output Range 1.23V min, 5V, 12V, 3.3V
InputMin Voltage 4 Volt
InputMax Voltage 40 Volt

Applications
1.Flyback regulator
2. Multiple-output regulator
3. Simple boost regulator
4. Forward converter

Source: http://www.national.com/pf/LM/LM2587.html

Be the first to comment - What do you think? Posted by admin - October 1, 2007 at 5:25 pm

Categories: DC converter, Switching power supply Tags: 5v to 12v dc converter, dual output power supply, LM2585, Switching Regulator IC

SG3525 DC Converter 12V to +35V,-35V

SG3525 DC/DC Converter 12V to +35V,-35V Switchmode Power Supply For Car Audio

The selected switching topology is called a “push-pull” converter, because the transformer has a double primary (or a “centre-tapped” one, if your prefer). The centre tap is permanently connected to the car battery (via an LC filter to avoid creating peaks in the battery lines, which could affect other electronic equipment in the car). The two ends of the primary are connected to a pair of paralleled MOSFETs each that tie them to ground in each conduction cycle (Vgs of the corresponding MOSFET high).

These MOSFETs should be fast, able to withstand high currents (in excess of 30A each if possible) and have the lowest possible Rds(on). The proposed On-Semiconductor?s MTP75N06 can withstand 75Amp and has a Rds(on) below 10 milliohm. This is important, because the lower this resistance is, the less power they are going to dissipate when switching with a square waveform. Another alternatives are MTP60N06, or the more popular BUZ11 and IRF540.

Although the schematics show a previous bipolar push-pull stage, you can also connect the gate resistor directly to the output of the controlling IC, leaving out the transistors, as the SG3525 is capable to drive up to 500 mA (theoretically), more than enough to switch the MOSFETs fast.

These MOSFETs should be fast, able to withstand high currents (in excess of 30A each if possible) and have the lowest possible Rds(on). …

Source:http://sound.westhost.com/project89.htm
Thank you.