Article
Power LED driver module (PLDM)
This year, for the first time, the efficiency of LEDs has overtaken that of fluorescent tubes. Power LEDs are thus now a realistic and energy-saving alternative to other forms of lighting. Getting them to light up, however, needs a bit of electronics, and hence the universal module described in this article.One thing is for sure: the twenty-first century will be the age of semiconductor light sources. This universal current source can drive up to eight white LEDs.
Materials
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
Elektor recommends the Elektor PCB Service service from its business partner Eurocircuits or AISLER as the best services for its own prototypes and volume production.
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PCB
Component list
Resistors
R1 = 1O / 2W (carbon film or metal film)
R2 = 10k
R3 = 1k
R4 = 2kO2
P1 = 10k
Capacitors
C1 = 1000µF 50V*
C2 = 100nF
C3 = 220µF 35V*
Semiconductors
D1,D2,D3 = SB340*
D4 = ZPD33V*
IC1 = LM2575Z-ADJ*
IC2 = LM385Z1.2
Miscellaneous
L1 = 330µH / 1.9A* (SMD power inductor, e.g. FASTRON PISR-331M-04 (Reichelt # L-PISR 330µ)
Tr = 2 x 6-27 V*
PCB, ref. 071129-1
R1 = 1O / 2W (carbon film or metal film)
R2 = 10k
R3 = 1k
R4 = 2kO2
P1 = 10k
Capacitors
C1 = 1000µF 50V*
C2 = 100nF
C3 = 220µF 35V*
Semiconductors
D1,D2,D3 = SB340*
D4 = ZPD33V*
IC1 = LM2575Z-ADJ*
IC2 = LM385Z1.2
Miscellaneous
L1 = 330µH / 1.9A* (SMD power inductor, e.g. FASTRON PISR-331M-04 (Reichelt # L-PISR 330µ)
Tr = 2 x 6-27 V*
PCB, ref. 071129-1
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