Diodes AL5812 - Manual (Page 5)

AL5812
Document number: DS35616 Rev. 2 - 2
5 of 11
www.diodes.com
November 2013
© Diodes Incorporated
NEW PROD
UC
T
AL5812
Typical Performance Characteristics
(cont.)
T = +25°C
2 LEDs
R
= 7.5k
f = 100Hz
A
SET
PWM
Ω
10 20 0 90 100 80 40 50 30 70 60
DUTY CYCLE (%)
Figure 7 LED Current vs. PWM Duty Cycle
110
100
90
80
70
60
50
40
30
20
10
0
LE
D
C
U
R
R
EN
T
(mA
)
125 160 130 155 140 145 150 135
TEMPERATURE (°C)
Figure 8 LED Current vs. T
SHDN
LE
D
C
U
R
R
EN
T
(m
A
)
14
12
10
6
2
-2
8
4
0
T
SHDN
T
HYS
V = 9V
R
= 75K
IN
SET
Ω
0 5 10 15 20 25 30 35 40 45 50 55 60
INPUT VOLTAGE (V)
Figure 9 R Voltage vs. Input Voltage
SET
0.500
0.495
0.490
0.485
0.480
0.475
R
V
O
LT
A
G
E (
V
)
SE
T
V = 1.2V
T = +25°C
LED
A
R = 7.5k
SET
Ω
R = 7.5k
SET
Ω
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (C)
Figure 10 R Voltage vs. Ambient Temperature
SET
0.500
0.495
0.490
0.485
0.480
0.475
R
V
O
LT
A
G
E (
V
)
SET
V = 1.2V
V = 3.5V
LED
IN
0 5 10 15 20 25 30 35 40 45 50 55 60
INPUT VOLTAGE (V)
Figure 11 Supply Current vs. Input Voltage
400
350
300
250
200
150
100
50
0
S
U
P
P
LY
C
U
R
R
EN
T
(µ
A
)
V = 1.2V
T = +25°C
LED
A
R = 4.99k
SET
Ω
R = 7.5k
SET
Ω
R = 12.4k
SET
Ω
S
U
P
P
LY
C
U
R
R
E
N
T
(µ
A
)
350
300
250
200
150
100
50
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
Figure 12 Supply Current vs. Ambient Temperature
R = 4.99k
SET
Ω
R = 7.5k
SET
Ω
R = 12.4k
SET
Ω
V = 1.2V
V = 3.5V
LED
IN