Switching Power Supply 5V | Electronic Project Circuits

Posts Tagged ‘switching power supply 5V’

Step down voltage converter 5v with transistor BC337

The circuit decreases the size voltage or Stepdown Voltage converter circuit be dc regulated circuit model switching converter. The that make voltage output there is the size voltage a little more input at feed give with the circuit. From circuit picture will decrease volt 6-18V from be left 5V. It give current get 100mA.

When feed volt give with transistor circuit Q1 and Q2 the connection is astable multi vibrator. Will do frequency production comes out at a collector pin of Q2 and transmit come to at a B pin of Q3. By Q3 perform like with switch wait for close-open the circuit for control to give Q4 work. When base pin of Q4 have voltage bias make Q4 work. The C3 perform charge by change the way coil L1 make output have voltage increase continually. But if be valuable 5V more than bear fruit make Q5 work. Because have voltage come to bias at B pin by change the way ZD1 switch off work because of volt at a B pin of Q1 be 0V. The circuit then stop to produce the frequency comes out. Then make Q4 stop work with. When Q4 stop work then have no Vbias give Q5 then stop work thus Q1 then can work again and work character repeated as like this before. But there are many speeds then make output that appear can come out 5V all the time.

Be the first to comment - What do you think? Posted by admin - May 26, 2010 at 10:11 pm

Categories: Switching power supply Tags: BC337, step down regulator, switching power supply 5V

USB to 5V SEPIC DC-DC Converter with Short-Circuit Protection

The single-ended primary inductance converter (SEPIC)
shown in Figure 3 IC LT1618 is ideal for applications where the
output must reduce to zero during shutdown. The input
current limit not only helps soft-start the output but also
provides short-circuit protection, ensuring USB device
compliance even under output fault conditions.

Read More. Source: http://www.linear.com

Be the first to comment - What do you think? Posted by admin - June 2, 2008 at 4:33 pm

Categories: DC converter, Switching power supply Tags: dc converter circuit, switching power supply 5V, usb power adapter

MC33167T switching regulator 5V 5A/-5V ,12V /-12V

This is circuit Switching power supply for MP3 player for automobile. It is powersupply that can be operated from the 12V battery of the car. The supply uses the Motorola MC33167T switching regulator operating at 72 kHz. And consists of a 5V/-5V section and a 12V/-12V section. This to use the small space in my enclosure more flexible.

I See circuit on website many. I link good site :http://home.concepts-ict.nl/~cybersake/carmp3/ about Supply for MP3player. Very good for all user.

Detail in web::
I worked on a project to build an MP3 player for my automobile. I needed a PC powersupply that can be operated from the 12V battery of my car. I studied some datasheets and rolled my own switched mode power supply (SMPS). The supply operates with a battery voltage of 7.5V to 20V (Limited by a transiënt suppressor). The supply can be used with a 24V battery when you replace the transiënt suppressor by a 30V type. The 12V and -12V section has a nice feature: It operates in step-up mode when the input voltage goes below 12V. My supply uses the Motorola MC33167T switching regulator operating at 72 kHz. The supply consists of a 5V/-5V section and a 12V/-12V section. This to use the small space in my enclosure more flexible.

I See circuit on website many. I link good site :http://home.concepts-ict.nl/~cybersake/carmp3/ about Supply for MP3player. Very good for all user.