VER :
B_1
update :
98.04.09
Encapsulated DC-DC Converter
ST20 SERIES
KEY FEATURES
Power Module for PCB Mountable
2:1 Input Range
Synchronous Rectifier Topology
Regulated Output
Low Ripple and Noise
Screw Terminal For Optional
Remote ON/OFF Control (Optional)
Standard 2” x 1” Package and Pinout
CE, UL Approval
2 Years Product Warranty
20 Watts
ELECTRICAL SPECIFICATIONS
Model No.
Max. Output Wattage (W)
Input Voltage (V.DC.)
Outut Voltage (V.DC.)
Efficiency
Model No.
Max. Output Wattage (W)
Input Voltage (V.DC.)
Outut Voltage (V.DC.)
Efficiency
ST20-24-2.5S
12.5W
24V (18-36V)
2.5V / 4000mA
83%
ST20-48-2.5S
12.5W
48V (36-75V)
2.5V / 4000mA
83%
ST20-24-3.3S
14W
24V (18-36V)
3.3V / 4000mA
86%
ST20-48-3.3S
14W
48V (36-75V)
3.3V / 4000mA
86%
ST20-24-5S
20W
24V (18-36V)
5V / 4000mA
87%
ST20-48-5S
20W
48V (36-75V)
5V / 4000mA
87%
Model No.
Max Output Wattage (W)
Input
Input Filter
Voltage (V.DC.)
Voltage Accuracy
Current (mA) max
Line Regulation (LL-HL) (typ.)
Output
Load Regulation (10-100%) (typ.)
Ripple
Noise
Efficiency
Switching Frequency
Over Power Protection
Over Voltage Protection
Protection
Short Circuit Protection
Transient Response
Voltage
Isolation
Resistance
Capacitance
Operating Temperature
Storage Temperature
Case Temperature
Environment
Temperature Coefficient
Humidity
MTBF
Dimension (L x W x H)
Case Material
Physical
Weight
Cooling Method
Safety
Agency Approvals
EMC
EMI (Conducted & Radiated Emission)
ST20-24-2.5S
12.5W
ST20-24-3.3S
14W
ST20-24-5S
20W
ST20-48-2.5S
12.5W
ST20-48-3.3S
14W
3.3
4000
ST20-48-5S
20W
5
4000
π
type
2.5
3.3
5
2.5
±2%
4000
4000
4000
4000
±0.5%
±1%
110mV max (Vp-p)
200mV max (Vp-p)
83%
86%
87%
83%
400KHz
Works over 120% of rating and recovers automatically.
Zener diode clamp
Current limit, auto-recovery
≦500
us (100% to 50% full load at
±1%
error band)
1600 VDC.
10
8
ohms
1000 pF
-25°C…+70°C (with derating)
-55°C…+105°C
+100°C max.
±0.02%
Per°C
95% RH
>550,000 h @ 25°C (MIL-HDBK-217F)
1.97 x 1.0 x 0.425 Inches ( 50.1 x 25.4 x 10.8 mm ) Tolerance
±0.5
mm
Nickel-Coated Copper with Non-conductive Base, Six-side Shielded
32 g
Free-air convection
CE, UL
EN 55022 class A
86%
87%
All specifications valid at nominal input voltage, full load and +25°C after warm-up time unless otherwise stated.
http://www.archcorp.com.tw
TEL: +886-2-26989508 FAX: +886-2-26981319
-1-
VER :
B_1
update :
98.04.09
Encapsulated DC-DC Converter
ST20 SERIES
MECHANICAL DIMENSION
( Top View )
PIN#
1
2
3
4
5
6
Single
20 Watts
ON / OFF CTL (Optional)
-DC IN
+DC IN
-DC OUT
NO PIN
+DC OUT
DERATING
BLOCK DIAGRAM
http://www.archcorp.com.tw
TEL: +886-2-26989508 FAX: +886-2-26981319
-2-
VER :
B_1
update :
98.04.09
Encapsulated DC-DC Converter
ST20 SERIES
SCREW TERMINAL
ST20-A2
20 Watts
PIN#
1
2
3
4.
5
6
7
8
Single
CTRL
-DC IN
+DC IN
-DC OUT
NO CONNECT
NO CONNECT
NO CONNECT
+DC OUT
Dual
CTRL
-DC IN
+DC IN
-DC OUT
NO CONNECT
COMMON
NO CONNECT
+DC OUT
ST20-A5
PIN#
1
2
3
4.
5
6
7
8
Single
CTRL
-DC IN
+DC IN
-DC OUT
NO CONNECT
NO CONNECT
NO CONNECT
+DC OUT
Dual
CTRL
-DC IN
+DC IN
-DC OUT
NO CONNECT
COMMON
NO CONNECT
+DC OUT
http://www.archcorp.com.tw
TEL: +886-2-26989508 FAX: +886-2-26981319
-3-
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