Diodes AP3988/89/90 - Manual (Page 6)

AP3988/89/90
Document number: DS36722 Rev. 3 - 2
6 of 13
www.diodes.com
March 2014
© Diodes Incorporated
AP3988/89/90
A Product Line of
Diodes Incorporated
N
E
W
P
R
O
D
U
C
T
-40 -20 0 20 40 60 80 100 120
4.5
5.0
5.5
6.0
6.5
T
u
rn
-o
ff
Vo
lt
a
g
e
(V)
Ambient Temperature ( o C)
125
-40 -20 0 20 40 60 80 100 120
500
550
600
650
700
750
O
p
e
ra
ti
n
g
C
u
rre
n
t
(
 A)
Ambient Temperature ( o C)
125
Performance Characteristics
Turn-on Voltage vs. Ambient Temperature Turn-off Voltage vs. Ambient Temperature
Operating Current vs. Ambient Temperature
Operation Description
+
C1
+
C
O
V
O
D1
R
FB1
R
FB2 R
CS
C
FB
CS
GND
AP3988/89/90
N
S
N
AUX
N
P
I
OUT
V
S
V
AUX
V
IN
L
M
CPC
C
CPC
Q1
V
bulk
Figure 1. Simplified Flyback Converter Controlled by AP3988/89/90
-40 -20 0 20 40 60 80 100 120
14.2
14.3
14.4
14.5
14.6
14.7
14.8
T
u
rn
o
n
Vo
lt
a
g
e
(V)
Ambient Temperature ( o C)