Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Please help me power supply schematic fo led lamp.

Status
Not open for further replies.

lcd_amptech

Newbie level 2
Joined
Dec 3, 2009
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
vietnam
Activity points
1,291
Hi every one!
I have a power supply schematic for led lamp such as below link.
This diagram, mark of U2 IC is SMD1002 - 802MS - TPU700 (3 line). I try found on google but not found datasheet.
I don't know what's U2 IC. Who can help me, please?
 

Attachments

  • mach nguon den led.JPG
    mach nguon den led.JPG
    63.2 KB · Views: 25

BradtheRad

Super Moderator
Staff member
Joined
Apr 1, 2011
Messages
13,975
Helped
2,786
Reputation
5,570
Reaction score
2,693
Trophy points
1,393
Location
Minneapolis, Minnesota, USA
Activity points
104,247
The circuit containing U2 is undoubtedly for the purpose of generating rapid pulses which turn the mosfet Q1 on and off.

What is U2? Maybe a timer IC. However its pin numbers don't match the 555.

Notice it has 'SMD' in the part no. If that stands for surface mount then you might want to try a larger component that's easier to work with.

By the way do you know that's a mighty complicated circuit for such a simple job as powering an LED?
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top