AC/DC Power Supply
FEATURES
● 2 Year Warranty
● Low Cost, High Reliability ● Fixed Switching Frequency ● Compact Size, Light Weight ● 100% Full Lo
ad Burn-In Tested ● Cooling Fan ON/OFF Auto Control ● Built-In EMI Filter, Low Ripple Noise ● AC Input Range Selectable by Switch ● Forced Air Cooling by Built-In DC Fan
● High Efficiency, Low Working Temperature ● Soft Start Circuit, Limiting AC Surge Current
● Short Circuit, Overload, Over Voltage, and Over Temperature Protected
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SPECIFICATIONS: PSS320 Series
All specifications are based on 25o
C, Nominal Input Voltage, and Maximum Output Current unless otherwise noted.
We reserve the right to change specifications based on technological advances.
INPUT SPECIFICATIONS Input Voltage Range 88 ~ 132VAC / 176 ~ 264VAC auto switch  (248 ~ 370VDC) Input Frequency 47 to 63Hz  AC Current (typical) 6A @ 115VAC        3.5A @ 230VAC Inrush Current (typical) 18A @ 115VAC      36A @ 230VAC Leakage Current < 3.5mA @ 240VAC OUTPUT S
PECIFICATIONS Output Voltage  See Table Output Power See Table  Voltage Tolerance  (See Note 3) 5V & 7.5V outputs: ±2.0%;    12V - 48V outputs: ±1.0% Voltage Adjustment Range See Table Line Regulation ±0.5% Load Regulation 5V & 7.5V outputs: ±1.0%;    12V - 48V outputs: ±0.5% Output Current See Table Ripple & Noise (max) (See Note 2) 5V - 24V outputs: 150mVp-p;    27V output: 200mVp-p;    48V output: 240mVp-p Setup, Rise Time  2000ms, 20ms @ full load Hold Up Time (typical) 24ms @ full load Temperature Coefficient ±0.03%/°C (0 ~ 50°C) PROTECTION
Overload Protection
105 ~ 135% rated output power
Protection Type: Hiccup mode, recovers automatically after fault condition is removed. Over Voltage Protection
See Table
Protection Type: Hiccup mode, recovers automatically after fault condition is removed. Fan Control, O.T.P  RTH1≥ 65°C Fan On, ≤ 55°C Fan Off, ≥ 70°C (5 ~ 15V)
RTH1≥ 70°C Fan On, ≤ 65°C Fan Off, ≥ 80°C (24 ~ 48V)
Protection Type: Hiccup mode, recovers automatically after fault condition is removed.
GENERAL SPECIFICATIONS  Switching Frequency 90KHz Efficiency See Table  Withstand Voltage 3000VAC (Input to Output), 1500VAC (Input to FG), 500VAC (Output to FG) Isolation Resistance  100M Ω/500DC (Input to Output, Input to FG, and Output to FG) ENVIRONMENTAL SPECIFICATIONS Working Temperature -10°C to +60°C (refer to output load derating curve) Storage Temperature -20°C to +85°C Working Humidity 20 ~ 90% RH non-condensing  Storage Humidity 10 ~ 95% RH Cooling Forced air cooling by built-in DC fan. Vibration 10 ~ 500Hz, 2G 10min./1 cycle, 60min each along X, Y, Z axes. MTBF 188,700 hours min. @ 25°C (MIL-HDBK-217F) PHYSICAL SPECIFICATIONS Weight 1080 grams Dimensions 215(L) x 115(W) x 50(H) mm Warranty    2 years SAFETY & EMC  Safety Standards UL60950-1 approved
AC/DC Power Supply
OUTPUT VOLTAGE / CURRENT RATING CHART
Model Number Input Voltage
Output Voltage Voltage
Adjust. Range Over Voltage Protection Output Current Ripple & Noise Output Power Efficiency  PSS-320-5    5 VDC    4.5 ~ 5.7V    5.75 ~ 6.75V 50A 150mVp-p 250W
77%  PSS-320-7.5 7.5 VDC    6 ~ 9V 9.4 ~ 10.9V 36A 150mVp-p 270W 80%  PSS-320-12 12 VDC 10 ~ 13.2V 13.8 ~ 16.2V 25A 150mVp-p 300W 82%  PSS-320-13.5 13.5 VDC 12 ~ 15V 15.5 ~ 18.2V 22A 150mVp-p 297W 83%  PSS-320-15 15 VDC 13.5 ~ 18V 18 ~ 21V 20A 150mVp-p 300W 84%  PSS-320-24 24 VDC 20 ~ 26.4V 27.6 ~ 32.4V 12.5A 150mVp-p 300W 86%  PSS-320-27 27 VDC 26 ~ 32V
33.7 ~ 39.2V 11A 200mVp-p 297W 86%  PSS-320-48
88 ~ 132 VAC
or
176 ~ 264 VAC
48 VDC
41 ~ 56V
57.6 ~ 67.2V
6.5A
240mVp-p
312W
87%
NOTES
1. All parameters NOT specially mentioned are measured at 230VAC input, rated load, and 25°C ambient temperature.
2. Ripple & noise are measured at 20MHz bandwidth by using a 12" twisted pair-wire terminated with a 0.1uF& 47uF parallel capacitor.
3. Tolerances include set up tolerance, line regulation, and load regulation.
BLOCK DIAGRAM
DERATING CURVE
STATIC CHARACTERISTICS
fosc: 90KHz
AC/DC Power Supply
MECHANICAL DRAWING
Unit: mm
Terminal Pin No. Assignment
Pin No. Assignment
1 AC/L
2 AC/N
3 FG
4 ~ 6 DC OUTPUT (-V)
7 ~ 9 DC OUTPUT (+V)