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usb e kits presents
Dc to dc converter

specifications

This is high performance DC-DC Step Down Ajustable Power Supply Module. Based on well know LM2756 Switching Regulator.


-Input voltage range: 4 V-40 V
-Output voltage range: 1.25 V-35 V via trimmer (see picture)
-Output current: 3 A(MAX)-need to add heat sink
-Conversion efficiency: Up to 92% (output voltage higher, the higher the efficiency)
-Switching Frequency: 150KHz
-Rectifier: Non-Synchronous Rectification
-Module Properties: Non-isolated step-down module (buck)
-Short circuit protection: current limiting, since the recovery
-Load regulation: ± 0.5%
-Voltage regulation: ± 0.5%-Dynamic response speed: 5% 200uS-Mode of connection:welding-Size:25mm*50mm (2 inch * 1 inch)

 

The LM2576 series of regulators are monolithic integrated circuits ideally


suited for easy and convenient design of a step–down switching regulator


(buck converter). All circuits of this series are capable of driving a 3.0 A load


with excellent line and load regulation. These devices are available in fixed


output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version.


These regulators were designed to minimize the number of external


components to simplify the power supply design. Standard series of


inductors optimized for use with the LM2576 are offered by several different


inductor manufacturers.


Application
s

-DIY mobile power supply
-Step-down charger
-Electronic equipment charger
-System preceding stage charger


Picture
Dc to Dc converter schematic

part list

Reference    Type            Value
C1        Ceramic Capacitor    2200uF
C2        Ceramic Capacitor    100uF
C3        Electrolytic Capacitor    100uF
U1        Voltage regulator    LM2576
L1        Inductor        150uH
L2        Inductor        20uH
D1        Diode            1N5822
J1        Terminal Block        2 pin
J2        Terminal Block        2 pin
R1        Resistor 1/4 watt    1.2k
RV1        trimmer            50k

construction help guide

Picture
resistor color code definition
Picture
lm2576
Picture
trimmer 3296
Picture
1N5822
Picture

click for soldering and prototyping assistant


downloads

dc_to_dc_converter.datasheet.pdf
File Size: 362 kb
File Type: pdf
Download File

Picture
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