Data Sheet

Block Diagram
RSD-30 series
fosc : 110KHz
CIRCUIT
DETECTION
O.L.P.
O.V.P.
EMI
FILTER
RECTIFIERS
&
FILTER
POWER
SWITCHING
FILTER
&
RECTIFIERS
+V
-V
I/P
FG
CONTROL
PWM
Input Fuse
There is one fuse connected in series to the positive input line, which is used to protect against abnormal surge. Fuse specifications of each
model are shown as below.
Type
G
L
H
Fuse Type
Time-Lag
Time-Lag
Time-Lag
Reference and Rating
CONQUE MST, 6.3A, 250V
CONQUE MST, 3.15A, 250V
CONQUE MST, 2A, 250V
Input Reverse Polarity Protection
Input Range and Transient Ability
Input Under-Voltage Protection
Inrush Current
There is a MOSFET connected in series to the negative input line. If the input polarity is connected reversely, the MOSFET opens and there
will be no output to protect the unit.
The series has a wide range input capability. With 40% of rated input voltage, it can withstand that for 1 second.±
If input voltage drops below Vimin, the internal control IC shuts down and there is no output voltage. It recovers automatically when input
voltage reaches above Vimin, please refer to the cruve below.
Inrush current is suppressed by a resistor during the initial start-up, and then the resistor is bypassed by a MOSFET to reduce power
consumption after accomplishing the start-up.
RSD-30G-24 RSD-30L-24 RSD-30H-24
37
25.5
0
5
10
15
20
25
30
24
32
40 48 56
Turn On
Turn Off
16.312.3
0
5
10
15
20
25
30
12 16 20 24 28 32
Tur n On
Tur n Off
8.3
6.3
0
5
10
15
20
25
30
6 8 10121416
Tur n On
Tur n Off
Vin Vin Vin
Vo Vo Vo
30W Reliable Railway DC-DC Converter
File Name:RSD-30-SPEC 2020-06-05