Owner's Manual

LDH-25 series
File Name:LDH-25-SPEC 2022-02-18
DC-DC Step-Up Constant Current LED driver
Efficiency VS Load
Number of LEDs
LDH-25-250 12VDC input Vf=3.05V
EFFICIENCY (%)
90%
91%
92%
93%
94%
95%
7 11 15 19 23 27
LDH-25-350 12VDC input Vf=3.14V
90%
91%
92%
93%
94%
95%
8 11 14 17 20 23
LDH-25-500 12VDC input Vf=3.18V
90%
91%
92%
93%
94%
95%
6 8 10 12 14 16
LDH-25-700 12VDC input Vf=3.29V
90%
91%
92%
93%
94%
95%
6 7 8 9 10 11
Number of LEDs
Number of LEDs
Number of LEDs
EFFICIENCY (%)EFFICIENCY (%)EFFICIENCY (%)
Application Notes:
1.The positive and negative input terminals must be connected correctly and negative voltage can not be input
to avoid damage to the power supply.
2.Due to the large input current, please pay attention to the voltage drop of the wiring, to ensure the power
supply to work properly.
3.At dim off,LDH output voltage will drop to the same level as input voltage.To get luminaires complete dark,
please make luminaires are light off when they are driving by the input voltage.
Number of LEDs
LDH-25-250 24VDC input Vf=3.05V
EFFICIENCY (%)
92%
93%
94%
95%
96%
97%
9 15 21 27
LDH-25-350 24VDC input Vf=3.14V
92%
93%
94%
95%
96%
97%
9 14 19 24
LDH-25-500 24VDC input Vf=3.18V
92%
93%
94%
95%
96%
97%
9 11 14 16
LDH-25-700 24VDC input Vf=3.29V
92%
93%
94%
95%
96%
97%
9 10 11 12
Number of LEDs
Number of LEDs
Number of LEDs
EFFICIENCY (%)EFFICIENCY (%)EFFICIENCY (%)