Diodes AP3064 - Manual (Page 10)

Preliminary Datasheet
Boost Type LED Driver with 4-Channel Current Source AP3064
Jul. 2012 Rev. 1. 5 BCD Semiconductor Manufacturing Limited
10
Typical Performance Characteristics (Continued)
V
IN
=24V, V
EN
=V
DD
=5V, 13 LEDs in series, 4 strings in parallel, 120mA/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
20
40
60
80
100
120
140
160
180
200
220
240
Channel Curre
nt (m
A)
Channel
I
SET
=60mA
I
SET
=220mA
I
SET
=120mA
I
SET
=160mA
I
SET
=180mA
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: 4P13S
I
CH
20mA/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