70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

10% 20%

30% 40%

50% 60%

70% 80%

90% 100%

277VAC

230VAC

115VAC

0 . 8 4

0 . 8 5

0 . 8 6

0 . 8 7

0 . 8 8

0 . 8 9

0 . 9

0 . 9 1

0 . 9 2

0 . 9 3

0 . 9 4

0 . 9 5

0 . 9 6

0 . 9 7

0 . 9 8

0 . 9 9

1

5 0 %

6 0 %

7 0 %

8 0 %

9 0 %

1 0 0 %

2 7 7 V A C

2 3 0 V A C

1 1 5 V A C

LPF-40Dseriespossesssuperiorworkingefficiencythatupto89%canbereachedinfieldapplications.

LOAD

EFFICIENCY vsLOAD(48VModel)

LOAD

ConstantCurrentMode

TherearetwomajorkindsofLEDdrivemethod"directdrive"and"withLEDdriver".

TypicalLEDpowersupplyI-Vcurve

A typicalLEDpowersupplymayeitherworkin"constantvoltagemode(CV)orconstantcurrentmode(CC)"todrivetheLEDs.

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).

DRIVINGMETHODSOFLEDMODULE

100

60

50

95

(max.)

Io (%)

Constant

Voltage area

Constant

Current area

Hiccup

Protection

(A)

(B)

(C)

(40W)

PowerFactorCharacteristic

40WSingleOutputSwitchingPowerSupply

FileName:LPF-40D-SPEC 2012-03-20