CV/CC driver Convert to CC Driver
Posted by: mickel
on
Dear Forum
Hi
what is principale of convert Constant Voltage/ Constant Current (CV/CC) Driver to only constant curernt(CC) Driver?
for Example in di173.pdf if remover Zener Diode VR2 Can to Obtain This Goal?
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if i use DI173 Circuit as CC Driver , and i want to use LED *1 Watt , with 350ma Current and Vf for each LED is 3.4 volt , How many Maximum and How many Minimum LED I can Drive ? what Elements value in DI173 circut should be change for my application?
Since DI-173 is 14W-20 V LED driver, it can drive parallel connected two sets of 6 LED's, which are connected in series.
Other combination of LED's will require T1 and R7 changes in DI-173.
You are correct that DI173 circuit will be CC driver only if you removed VR2.
Also you might want to check Linkswitch-PH or LinkSwitch-PL devices, which are CC only driver with high Power Factor.