Power-supply-regulator | Electronic Project Circuits

Posts Tagged ‘power-supply-regulator’

Soft Start Power Supply with IC LM317 and L200

In order to perform this soft-start function, the LM317 voltage regulator IC requires an external universal PNP transistor and the L200 uses its internal comparator (pin 2).
After switch-on, the rising voltage on the positive side of the charging electrolytic capacitor slowly turns the (initially conducting) transistor off, thus raising the voltage (relative to ground) on the adjustment pin of the LM317.

The output voltage rises slowly and reaches 15 V in 5 seconds.
In the L200 circuit, the corresponding electrolytic capacitor’s rising voltage gradually relaxes the current-regulation loop inside the L200.
Source:http://www.zen22142.zen.co.uk/Circuits/Power/softstart.htm

Be the first to comment - What do you think? Posted by admin - September 8, 2007 at 7:18 pm

Categories: Power supply Tags: L200, LM317, power-supply-regulator, soft start

LM317 Linear power supply Regulator selector 1.5V,3V,4.5V,5V,6V,9V 1.5A

This is circuit Linear power supply Regulator,
Use IC LM317 ( hot ic regulator) it Adjustable Voltage Output.
Control By Selector SW, so Output Voltage 1.5V , 3V,4.5V,5V,6V,9V and 1.5A All Volt out.
Detail See on circuit image.

Be the first to comment - What do you think? Posted by admin - September 4, 2007 at 9:56 pm

Categories: Power supply, Variable Regulator Tags: LM317, power-supply-regulator, Variable Regulator

L200 Variable Power Supply 3 to 15 volts 2Amp

This is circuit variable voltage regulator power supply. It use IC L200 ( good ic regulator) Out voltage 3V to 15V and Current 2A . By Transformer 2A 12V. Detail more see to circuit.

Using the versatile L200 voltage regulator, this power supply has independent voltage and current limits. The mains transformer has a 12volt, 2 amp rated secondary, the primary winding should equal the electricity supply in your country, which is 240V here in the UK. The 10k control is adjusts voltage output from about 3 to 15 volts, and the 47 ohm control is the current limit. This is 10mA minimum and 2 amp maximum. Reaching the current limit will reduce the output voltage to zero.

Read More Source:http://www.mitedu.freeserve.co.uk/Circuits/Power/l200var.html
Thank you.