This version is outdated by a newer approved version.
This version (30 Jul 2021 07:10) was approved by Victor Calinao, Jr.The Previously approved version (07 Jun 2018 17:46) is available.
This version (30 Jul 2021 07:10) was approved by Victor Calinao, Jr.The Previously approved version (07 Jun 2018 17:46) is available.This is an old revision of the document!
Table of Contents
CftL-LED-Bar
Description
The CftL-LED-Bar is a boards that contains LED's with 3 different spectral outputs (627nm, 530nm and 470nm). Each of the three channels contains a string of four LED's in series able to handle currents of up to 1A.
Recommended LED's
- Lumileds Red LED- LXM5-PD01
- Lumileds Green LED- LXML-PM01-0080
- Lumileds Blue LED- LXML-PB02
Connectors
Screw Terminals
Screw terminals P1, P5 and P9 are connectors for the anode and cathode for each of the red, green and blue channels of the CftL-LED-BAR. Pin 1 is the anode and is to be connected to the positive terminal of the source while pin 2 is the cathode and is to be connected to the negative terminal of the source.
3 Pin Headers
The 3 pin header is used to add LED's to series string of each channel. Placing a shunt on +XLEDN, where X is for the channel to be controlled and N refers to the LED number, adds the next LED on the string and placing the shunt on GND position terminates the string, connecting the last LED to the negative terminal.
LED Ratings
Red Channel
Each LED on this string has a typical forward voltage of 2.9V and tested with 500mA of current. Adding LED's to the string of LED's in series will result in a higher forward voltage. Please see below table for reference:
| No. of LED's | Minimum Forward Voltage Required |
| 1 | 2.9V |
| 2 | 5.8V |
| 3 | 8.7V |
| 4 | 11.6V |
Green Channel
Each LED on this string has a typical forward voltage of 3.21V and tested with 500mA of current. Adding LED's to the string of LED's in series will result in a higher forward voltage. Please see below table for reference:
| No. of LED's | Minimum Forward Voltage Required |
| 1 | 3.21V |
| 2 | 6.42V |
| 3 | 9.63V |
| 4 | 12.84V |
Blue Channel
Each LED on this string has a typical forward voltage of 2.95V and tested with 500mA of current. Adding LED's to the string of LED's in series will result in a higher forward voltage. Please see below table for reference:
| No. of LED's | Minimum Forward Voltage Required |
| 1 | 2.95V |
| 2 | 5.90V |
| 3 | 8.85V |
| 4 | 11.80V |
Schematic, PCB Layout, Bill of Materials
CFTL-LED-BAR Design & Integration Files
Related Hardware
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End of Document
resources/eval/user-guides/circuits-from-the-lab/cftl-led-bar.1627621827.txt.gz · Last modified: 30 Jul 2021 07:10 by Victor Calinao, Jr