Diodes AP3612 - Manual (Page 10)

Preliminary Datasheet
Boost Type LED Driver with 12-Channel Current Source AP3612
Aug. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
10
Typical Performance Characteristics (Continued)
V
IN
=24V, V
EN
=V
DD
=5V, 13 LEDs in series, 12 strings in parallel, 60mA/string, T
A
=25°C, unless otherwise
specified.
Figure 8. Channel Current vs. Channel Figure 9. Efficiency vs. Output Current
Figure 10. Steady State Figure 11. System Startup
0 1 2 3 4 5
0
10
20
30
40
50
60
70
80
C
hannel Curr
ent (m
A
)
Channel
I
SET
=20mA
I
SET
=73mA
I
SET
=40mA
I
SET
=60mA
0 100 200 300 400 500 600 700 800
80
82
84
86
88
90
92
94
96
98
Ef
ficien
c
y (%)
Output Current (mA)
V
IN
=24V
LED: 12P13S
I
CH
10mA/div
V
SW
50V/div
V
OUT_AC
500mV/div
V
CH
200mV/div
Time 1 µs/div
V
SW
20V/div
V
IN
20V/div
V
OUT
20V/div
I
CH
100mA/div
Time 20ms/div