B&B Electronics SD-25 Series - Datasheet - Manual (Page 2)

Mechanical Specification
Derating Curve Static Characteristics(SD-25C-24V)
File Name:SD-25-SPEC 2010-07-27
Case No. 905 Unit:mm
AMBIENT TEMPERATURE ( )
L
O
A
D(
%
)
100
10 0
0
20
40
60
80
-10
-10 20 30 40 50
45 60
55
SD-25A
SD-25B-5
SD-25C-5
SD-25B,C/12,24
INPUT VOLTAGE (V)
25 30 35 40 45 50 55 60 65 70 72
350 32
300 28
250 24
200 20
150 16
100 12
50 8
O
U
T
P
U
TV
O
LT
A
G
E(
V
)
O
U
T
P
U
TR
IP
P
L
E(
m
V
p
-p
)
Ta=25
(VERTICAL)
( ) HORIZONTAL
3.5
5 8
.2
4
3
2
1
7
5.5
74 18
6.5 87
99
89 4.5
55 20.5
5
1
.5
2-
M
3
9
.5
3.5
3.5
3.5
2-M
3
3
6
1
7
.5
3
6
5
5
.5
9
7
2
8
Terminal Pin No. Assignment
1 4
2
3
5
DC INPUT V-
DC INPUT V+ DC OUTPUT -V
DC OUTPUT +V
FG
Pin No. Pin No. Assignment Assignment
Block Diagram
fosc : 83KHz
CIRCUIT
DETECTION
O.L.P.
O.V.P.
EMI
FILTER
RECTIFIERS
&
FILTER
POWER
SWITCHING
FILTER
&
RECTIFIERS
+V
-V
I/P
FG
CONTROL
PWM
50W Single Output DC-DC Converter
S D - 2 5
s e r i e s