Diodes AP3608E - Manual (Page 7)

EIGHT-CHANNEL CONSTANT CURRENT SINK WITH CURRENT MATCH AP3608E
7
Mar. 2011 Rev. 1. 5 BCD Semiconductor Manufacturing Limited
Data Sheet
0 20 40 60 80 100
0
2
4
6
8
10
12
14
16
18
20
Cu
rr
ent
per
Chan
nel
(m
A)
Duty Cycle (%)
-60 -40 -20 0 20 40 60 80 100 120 140
18.0
18.5
19.0
19.5
20.0
20.5
21.0
21.5
22.0
Current per
Channel
(mA
)
Temperature ( o C)
R
ISET
=23K
Parameter Symbol Conditions Min Typ Max Unit
Enable Section
EN Pin High Level Threshold Voltage V
IH_EN
1.8 V
EN Pin Low Level Threshold Voltage V
IL_EN
0.8 V
PWM Dimming Section
PWM High Level Threshold Voltage V
IH_PWM
1.8 V
PWM Low Level Threshold Voltage V
IL_PWM
0.8 V
Interface Section
SDB High Level Output Voltage V
OH
2.4 V
SDB Low Level Output Voltage V
OL
0.4 V
Feedback Output Current I
FB
5 15 µA
Total Device
Self-check Voltage @ Open LED V
CHECK
3.0 V
Thermal Shutdown Temperature T
OTSD
160 o C
Thermal Shutdown Hysteresis T
HYS
20 o C
Electrical Characteristics (Continued)
Limits in standard typeface are guaranteed for V
IN
=V
EN
=5V, R
ISET
=8k Ω ,, T
A
=25 o C, unless otherwise specified.
Typical Performance Characteristics
V
IN
=V
EN
=5V, R
ISET
=8k Ω ,, T
A
=25 o
C, unless otherwise specified.
Figure 4. Current per Channel vs. Temperature Figure 5. Current per Channel vs. Duty Cycle