Whenever a lighting application, such as street lighting for example, requires an elevated number of LEDs, there are basically two solutions: the first is to connect all the diodes in series in a single "string"; the second is to place several strings in parallel with fewer elements in each one.
The first solution, even if simpler, poses stringent safety requirements due to the high supply voltage. The latter needs a lower input voltage but the current through each string has to be independently controlled.
Since, from a system point of view, the second solution seems more viable, we have developed an application to investigate the possibility of employing an L6562A to implement such a constant current controller. This document describes the EVL6562A-LED demonstration board and summarizes the relevant results obtained.
| Manufacturer | STMicroelectronics |
|---|---|
| Category | Lighting |
| Sub-Category | LED Drivers - DC In |
| Eval Board Part Number | 497-10420-ND |
| Eval Board Supplier | STMicroelectronics |
| Eval Board |
Normally In Stock
|
| Voltage In |
36 ~ 60 V
|
| Topology |
Step Down
|
| Current Out |
350 mA
|
| Voltage Out (Max) |
45 V
|
| Outputs and Type |
1 Non-Isolated
|
| Efficiency @ Conditions |
>92%, 48V in, 40 ~ 45V @ 350 mA
>82%, 48V in, 16Vled @ 350 mA |
| Features |
Current Limit (Adj. or Fixed)
Dimming Control Open Circuit Protection Short Circuit Protection Shutdown, Enable, Standby |
| Switching Frequency |
15 ~ 460 kHz
|
| Component Count + Extras |
46 + 1
|
| Design Author |
STMicroelectronics
|
| Application / Target Market |
Lighting: LED Street Lighting
|
| Main I.C. Base Part |
L6562A
|
| Date Created By Author | |
| Date Added To Library | 2011-03 |
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