Diodes AP8802H - Manual (Page 4)

AP8802H
60V 1A LED STEP-DOWN CONVERTER
AP8802H
Document number: DS32227 Rev. 6 - 2
4 of 14
www.diodes.com
May 2012
© Diodes Incorporated
PRELIMINARY
NEW PROD
UC
T
Typical Characteristics
INPUT VOLTAGE (V)
Figure. 2 Supply Current (not switching) vs. Input Voltage
0 60 5 55 10 15 20 25 30 35 40 50 45
0.1
0
0.3
0.2
0.7
0.6
0.9
0.8
0.5
0.4
N
O
N-
SW
IT
C
H
IN
G
S
U
P
P
L
Y
C
U
R
R
EN
T
(m
A
)
AMBIENT TEMPERATURE (°C)
Figure. 3 V vs. Ambient Temperature
CTRL
-40 125 -25 110 -10 5 20 35 50 65 95 80
1.244
1.252
1.250
1.256
1.254
1.248
1.246
C
T
R
L V
O
L
T
A
G
E (
V)
AMBIENT TEMPERATURE (°C)
Figure. 4 R vs. Ambient Temperature
DS(ON)
-40 125 -25 110 -10 5 20 35 50 65 95 80
0
0.8
0.6
1.2
1.0
0.4
0.2
C
T
R
L V
O
L
T
A
G
E (
V
)
0 0.5 1.0 1.5 2.0 2.5
R RESISTANCE ( )
SET
Ω
Figure. 5 LED Current vs. R
SET
1000
900
800
700
600
500
200
100
0
400
300 LE
D
C
U
R
R
E
N
T
(mA
)
0 0.5 1.0 1.5 2.0 2.5
CTRL VOLTAGE (V)
Figure. 6 LED Current vs. V
CTRL
0
200
1000
1200
600
800
400
L
E
D
CURRE
NT
(
m
A)
R = 0.2
SET
Ω R = 0.3
SET
Ω
R = 0.68
SET
Ω
CTRL VOLTAGE (V)
Figure. 7 Switching Frequency vs. V
CTRL
0 2.5 0.5 1.0 1.5 2.0
0
500
400
800
700
100
SW
IT
C
H
IN
G
F
R
E
Q
U
E
N
C
Y
(k
H
z)
300
600
200