Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

LM2575 Switching Regulator

LM2575 Switching Regulator

The purpose of a voltage regulator circuit is to take a variable input voltage and produce a steady output voltage. Two common regulator types are linear and switch-mode. Linear regulators are simple, but waste a lot of power in the process of regulating the voltage. Linear regulators can be thought of as self adjusting series resistors.
Connect the input of the circuit to a 12V power source, such as a solar-charged lead acid battery. Adjust the 10K trimmer potentiometer for the desired output voltage. Connect the load device to the output connections, and power up the load. For the best power efficiency, be sure to switch off the input power to the regulator circuit when the load circuit is not in use.

For use as a linear current booster, connect the circuit input to a 36 cell (18V, 12V nominal) solar panel. Put the solar panel in the sun and adjust the 10K trimmer potentiometer for the desired output voltage. Connect the lower voltage load device to the output connections and power up the load. In this mode of operation, there is no storage battery, so the load only works when the sun is shining on the solar panel. The regulator IC will accept input voltages up to 40V DC, this allows the circuit to be used with 36V (24V nominal) solar panels. If you use this circuit with input voltages above 22V, change the 100uF capacitor to a 50V part and replace the transzorb with a 47V part

There are a few unusal parts in this circuit. The 330uH inductor is available from digikey.com as part number TE2017-ND. Other inductors can be used, but they should be designed for use in switching power supplies. The output filter capacitor section uses a 330uF electrolytic capacitor in parallel with a 10uF tantalum capacitor. It is possible to use other capacitor combinations, such as a 330uF “Low ESR” type electrolytic capacitor and a 100nF ceramic disk capacitor or a standard 330uF electrolytic capacitor in parallel with a 1nF disk capacitor and a 100nF mylar capacitor. The small value capacitors improve the high frequency rejection of the electrolytic device

Visit Here for more.







 

More Articles to Read

App note: Noise analysis for high-speed op amps
App note: Noise analysis for high-speed op amps
Skill Sunday: Arrays
Skill Sunday: Arrays
App note: Infrared remote control implementation with MSP430FR4xx
App note: Infrared remote control implementation with MSP430FR4xx
Gesture Controlled Smart Home
Gesture Controlled Smart Home
Design for a Wideband, Differential Transimpedance DAC Output
Design for a Wideband, Differential Transimpedance DAC Output
Wrist thrusters let you fly through the water effortlessly
Wrist thrusters let you fly through the water effortlessly
Bertan/Spellman 225-20R HV power supply teardown
Bertan/Spellman 225-20R HV power supply teardown
Blinking Christmas Lights
Blinking Christmas Lights
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adding an “extra sense” with rangefinders
Adding an “extra sense” with rangefinders
This wireless game controller looks like a rug
This wireless game controller looks like a rug
How to run your ESP8266 for years on a battery
How to run your ESP8266 for years on a battery
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Making beats on a tiny Arduino DJ controller
Making beats on a tiny Arduino DJ controller
Qinsi-QS5100 Sn63Pb37 solder profile
Qinsi-QS5100 Sn63Pb37 solder profile
Water Detection System
Water Detection System
Professional Hi-Fi 15W Tube Amplifier circuit
Professional Hi-Fi 15W Tube Amplifier circuit
This Arduino machine will judge how sick your ollies are
This Arduino machine will judge how sick your ollies are
Turn an old payphone into a boombox for ’90s hits
Turn an old payphone into a boombox for ’90s hits
Big F’n 3D printer build
Big F’n 3D printer build

Top


Shares