LT3799
TYPICAL PERFORMANCE CHARACTERISTICS
LED Current vs Input Voltage
1.20
1.15
1.10
1.05
I
LED
(A)
I
LED
(A)
1.00
0.95
0.90
0.85
0.80
90
100
110
120
130
V
IN
(V
AC
)
140
150
3799 G18
LED Current vs Input Voltage
1.20
1.15
1.10
1.05
I
LED
(A)
1.00
0.95
0.90
0.85
0.80
170 180 190 200 210 220 230 240 250 260 270
V
IN
(V
AC
)
PAGE 17 SCHEMATIC:
OPTIMIZED FOR 220V
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
LED Current vs Input Voltage
PAGE 17 SCHEMATIC:
UNIVERSAL
PAGE 17 SCHEMATIC:
OPTIMIZED FOR 120V
3799 G19
90 110 130 150 170 190 210 230 250 270
V
IN
(V
AC
)
3799 G20
Power Factor vs Input Voltage
1.00
0.99
0.98
POWER FACTOR ( )
POWER FACTOR ( )
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.90
PAGE 17 SCHEMATIC:
OPTIMIZED FOR 120V
90
100
110
120
130
V
IN
(V
AC
)
140
150
3799 G21
Power Factor vs Input Voltage
1.00
0.99
0.98
POWER FACTOR ( )
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.90
170 180 190 200 210 220 230 240 250 260 270
V
IN
(V
AC
)
PAGE 17 SCHEMATIC:
OPTIMIZED FOR 220V
1.00
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.90
Power Factor vs Input Voltage
PAGE 17 SCHEMATIC:
UNIVERSAL
3799 G22
90 110 130 150 170 190 210 230 250 270
V
IN
(V
AC
)
3799 G23
Efficiency vs Input Voltage
100
95
90
EFFICIENCY (%)
EFFICIENCY (%)
85
80
75
70
65
60
90
100
110
120
130
V
IN
(V
AC
)
140
150
3799 G24
Efficiency vs Input Voltage
100
95
90
85
80
75
70
65
60
170 180 190 200 210 220 230 240 250 260 270
V
IN
(V
AC
)
EFFICIENCY (%)
PAGE 17 SCHEMATIC:
OPTIMIZED FOR 220V
100
Efficiency vs Input Voltage
PAGE 17 SCHEMATIC:
95 UNIVERSAL
PAGE 17 SCHEMATIC:
OPTIMIZED FOR 120V
90
85
80
75
70
65
60
90 110 130 150 170 190 210 230 250 270
V
IN
(V
AC
)
3799 G25
3799 G26
3799p
6
LINER [ LINEAR TECHNOLOGY ]
