7/25/2019 1.2to35V DC DC Converter

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1.2V TO 35V OUT PUT ADJUSTABLE DC-DC CONVERTER

0 7 0 4 1

1.2V to 35V Adjustable DC-DC Converter project has been design around TI LM2576-ADJ IC.

Input supply 40 VDCOutput 1.2 to 35 VDC @ 3 Amps regulated low ripple DC voltageOnboard potentiometer for output voltage adjustOnboard bridge rectifier for AC voltage inputLED indication at inputTerminal block connectors for input and output connection

Heat Sink includesFour mounting holes of 3.2 mm each

PCB dimensions 70 mm x 63 mm

+V

GND

INPUT

SUPPLY

1.2 TO 35 VDC

1/2W 1/2W

32 VAC / 40 VDC

L2 20uHL2 20uH

R3

1.2K

R3

1.2K

CN1

DC OUT

CN1

DC OUT

D2 1N5402D2 1N5402

+

C3

470uF/50V

+

C3

470uF/50V

CN2

AC/DC IN

CN2

AC/DC IN

D3 1N5402D3 1N5402

D6

IN5822

D6

IN5822

+

C5

100uF/50V

+

C5

100uF/50V

R24.7KR24.7K

VIN1

OUT 2

GN

D

3

FB 4

ON

/OFF

5

U1

LM2576T-ADJ

U1

LM2576T-ADJ

D5

RED LED

D5

RED LED

C4

0.1uF

C4

0.1uF

R14.7KR14.7K

D1 1N5402D1 1N5402

P1

50K

POT

P1

50K

POT

L1 150uHL1 150uH

D4 1N5402D4 1N5402

J1

JUMPER

J1

JUMPER

+

C2

2200uF/50V+

C2

2200uF/50VC1

0.1uFC1

0.1uF

SR. QTY. REF. DESCRIPTION

1 1 CN1 2 PIN TERMINAL BLOCK CONNECTOR

2 1 CN2 2 PIN TERMINAL BLOCK CONNECTOR

3 2 C1,C4 0.1uF

4 1 C2 2200uF/50V

5 1 C3 470uF/50V

6 1 C5 100uF/50V

7 4 D1,D2,D3,D4 1N5402 /1N5408

8 1 D5 RED LED

9 1 D6 IN5822

10 1 J1 OMIT

11 1 L1 150uH INDUCTOR

12 1 L2 20uH INDUCTOR

13 1 P1 47K/50K POT

14 2 R1,R2 4.7K, 0.5W

15 1 R3 1.2K

16 1 U1 LM2576T-ADJ

17 1 HEATSINK HS05025

18 3 SC REW SC 02905

19 1 NUT NT02900

Applications :Table Top Power SupplyLab Power Supply

AutomotiveBattery Operated Equipment

Amusement Rides

AC Mains Supply

Voltage Adjust

Output Load

Transformer

Note : Don't use J1

www.twovolt.com www.youtube.com/thetwovolt Author Rajkumar Sharma www.koteq.com

OMIT

7/25/2019 1.2to35V DC DC Converter

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