5V 10A 50W Offline Switching Power Supply

5V 10A 50W Offline Switching Power Supply
This is the switching power supply circuit diagram with 50W power output with a 5V voltage 10A current. It is a flyback converter operating in the continuous mode. The circuit features a primary side and secondary side controller will full-protection from fault conditions such as overcurrent. (more…)

5V Switch Mode Power Supply using LM2674

5V Switch Mode Power Supply using LM2674
In the typical power supply is used in chip LM2674 company National Semiconductor , for many years engaged in manufacturing and designing components for the pulse transformers. LM2674 can be used instead of a chip LM2671 . By choosing different versions of chips, you can collect the converter with a constant (3.3, 5 or 12V) or with an adjustable output voltage. The above scheme gives a current of 500 mA. (more…)

10W Adapter for Portable Audio Devices

10W Adapter for Portable Audio Devices
Flyback power supply shown in Figure 1 uses a chip TNY278PN to convert input voltage of 90-265 over ouput voltage  in 5V and 2 A. This voltage is applied to the MP-3 audio players, USB-chargers, etc. (more…)

Small Size Power Supply 5-12V

Small Size Power Supply 5-12V
The proposed unit is designed for AC power small electronic devices (handheld radios, tape recorders, watches, etc.). The output voltage can be selected within the range of 5 to 12 V. One of the advantages of unit - small size: all its parts are placed in the body ... mains plug. (more…)

Simple Variable Power Supply using L4960

Simple Variable Power Supply using L4960
Modern circuit design and chip manufacturers make life easier for the designer's great-for example, when creating a power source. We demonstrate this on a chip factory L4960. The documentation on it is possible to produce regulated power supply with an output voltage of 5.1 V. .. 40 V, with load current 2.5 A, built-in protection for current and overheat, efficiency up to 90%. Power dissipation from the radiator - 15 watts, frequency conversion 50 .. 150 kHz. (more…)

Mains AC / DC Converter with SR03x

Mains AC / DC Converter with SR03x
This is another Transformerless power supply.  IC voltage regulators for SR03x made ​​by Supertex is connect directly to main voltage and get the output voltage to 3.3V and 5V chip for SR036 SR037 to 30mA output current. To use this chip is not necessary to use step-down transformer or coil. Rectified input voltage to the diode bridge diodes D1 - D4 (figure point a) is input circuits IC1 SR03x. (more…)

Simple power supply 5V, 0.5A

Simple power supply 5V, 0.5A
The power supply is designed to supply a stabilized 5V various digital devices with current consumption up to 0.5 A. The transformer T1 is made on the magnetic core SHL20H32. The network contains 1650 turns of PEV-1 d = 0,1 mm, coil II - 55 turns of PEV-1 d = 0,47. In general, for the power supply can use a suitable transformer ready 7W, which provides for winding II AC 8 ... 10 V at a current of 500 mA. Regulating transistor