AL5812
Document number: DS35616 Rev. 4 - 2
5 of 13
www.diodes.com
March 2014
© Diodes Incorporated
L5812
Typical Performance Characteristics
Notes: 11. These curves have been limited at larger input voltages due to power dissipation.
12. Lower input voltage range is limited by the LED chain voltage
13. The AL5812 has its V
CC
pin connected to its LED pin, which are connected to the positive input supply voltage. R
SET
is connected to AL5812 GND
pin, which is connected to the anode of the LED chain. This creates a high side driver of the LED chain. See Figure 15.
145
140
120
100
60
40
20
0
80
0 5 10 15 20 25 30 35 40 45 50 55 60
INPUT VOLTAGE (V)
Figure 1 LED Current vs. Input Voltage
LED
U
ENT (mA)
V = 1.2V
T = +25°C
LED
A
R = 4.99k
SET
R = 7.5k
SET
R = 12.4k
SET
-40 -25 -10 5
TEMPERATURE (°C)
Figure 2 LED Current vs. Ambient Temperature
20 35 50 65 80 95 110 125
L
D
(
A)
R = 4.99k
SET
R = 7.5k
SET
R = 12.4k
SET
V = 1.2V
V = 3.5V
LED
CC
160
140
120
100
80
60
40
20
0
0 5 10 15 20 25 30
LED VOLTAGE (V)
Figure 3 LED Current vs. LED Pin Voltage (Note 11)
LED CURRENT (mA)
V = 3.5V
T = +25°C
IN
A
R = 4.99k
SET
R = 7.5k
SET
R = 12.4k
SET
0 0.5 1.0 1.5 2.0 2.5 3.0
LED VOLTAGE (V)
Figure 4 LED Current vs. LED Pin Voltage Zoomed
L
D
U
N
(m
)
160
140
120
100
80
60
40
20
0
V = 3.5V
T = +25°C
IN
A
R = 12.4k
SET
R = 4.99k
SET
R = 7.5k
SET
0 5 10 15 20 25 30 35 40 45
INPUT VOLTAGE (V)
Figure 5 LED Current vs. Input Voltage - 2 LEDs
(Note 11 & 12)
160
140
120
100
80
60
40
20
0
LED CURRENT (mA)
T = +25°C
A
2 LEDs
R = 12.4k
SET
R = 4.99k
SET
R = 7.5k
SET
0246810121416182022
INPUT VOLTAGE (V)
Figure 6 LED Current vs. Input Voltage
2 LEDs - High Side Drive (Notes 11, 12 &13)
LED
U
ENT (m
)
160
140
120
100
80
60
40
20
0
T = +25°C
V pin tied to LED pin
2 LEDs
A
CC
R = 12.4k
SET
R = 4.99k
SET
R = 7.5k
SET