68

72

76

80

84

88

92

96

10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

277Vac

230Vac

115Vac

0.78

0.80

0.82

0.84

0.86

0.88

0.90

0.92

0.94

0.96

0.98

1.00

50%

60%

70%

80%

90%

100%

277V a c

230V a c

115V a c

There are two major kinds of LED drive method "direct drive" and "with LED driver".

A typical LED power supply may either work in "constant voltage mode (CV) or constant current mode (CC)" to drive the LEDs.

Mean Well's LED power supply with CV+ CC characteristic can be operated at both CV mode (with LED driver, at area (A) and CC mode (direct drive, at area (B).

DRIVING METHODS OF LED MODULE

Power Factor Characteristic

LOAD

Constant Current Mode

EFFICIENCY vs LOAD (48V Model)

HLG-120H series possess superior working efficiency that up to 93.5% can be reached in field applications.

LOAD

(120W)

120W Single Output Switching Power Supply

File Name:HLG-120-SPEC 2014-06-13

In the constant current region, the highest voltage at the output of the driver

depends on the configuration of the end systems.

Should there be any compatibility issues, please contact MEAN WELL.

Typical LED power supply I-V curve

100

50

100

Io (%)

Constant

Voltage area

Constant

Current region

(A)

(B)