User Manual

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1) Make sure LED working current and maximum working voltage.
2) Connect right input voltage at input terminal. (Note:Please don’t connect load
during setting parameter).
3) Short circuit between OUT+ and OUT-(Connect both by wire). Or test output
voltage by multimeter at output terminal and adjust CV potentiometer to set
output voltage to LED’s maximum working voltage.
4) Rotate CC potentiometer counterclockwise more than 10 turns.
5) Test Output short circuit current by multimeter at 10A or 20A(Connect two Test
Probes to output terminal on module)Or Short circuit output terminal directly.
6) Rotate CC constant current potentiometer clockwise to set output current
according to require LED working current.
7) Connect LED and test.
Warm tips:
1>.It is a DC power module, So it can not connect to AC power.
2>.Please don’t short output.
3>.Please make sure input power is more than load power.
4>.Please step down output power if module is hot.
5>.Rotate CV potentiometer counterclockwise more than 10 turns if the output
voltage can not be adjusted.
6>.Output current can not keep fix value output.It changes with load.But It can
not exceed set output current value.
7>.There is a protective film on the surface of the shell. It is recommended to tear
it off for a clearer effect.
8>.Please read user manual and description before use.
Application:
 Ordinary power supply
 Battery charger
 LED drive power
 Instrument voltage display
 Test meter
 Circuit test
 Power conversion
 Fan governor
Package:
1>.1pcs ZK-DP3A USB CVCC Buck Boost Voltage Converter