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    15V DC 3.4A 50W Switching Power Supply

    High quality and low cost 50W switching power supply converts 110V/220V AC to 15V DC, with 3.4A rated current. It makes a good performance in home appliances, office equipment and industrial equipment.
    SKU: ATO-SMPS-50-15
    Free shipping
    Delivery date: 6-12 days


    • Universal AC input/Full range
    • Short circuit, overload and overvoltage protection
    • Cooling by free air convection
    • 100% full load burn-in test
    • High reliability and wide range of applications


    Basics Model ATO-S-50-15
    Dimension 159*97*38mm (L*W*H)
    Weight 0.51kg
    Output DC Voltage 15V
    Rated Current 3.4A
    Current Range 0~3.4A
    Rated Power 50W
    Ripple & Noise (max.)( Note 2) 150mVp-p
    Voltage Adjust Range 13.5~16.5V
    Voltage Tolerance (Note 3) ±1.0%
    Line Regulation ±0.5%
    Load Regulation ±0.5%
    Setup, Rise, Holdup time 300ms, 50ms, 80ms /230VAC 800ms, 50ms, 12ms/115VAC at full load
    Input Voltage Range 85 ~ 264V AC or 120 ~ 370V DC
    Frequency Range 47~63Hz
    Efficiency (Typ.) 77%
    AC Current (Typ.) 2A/115V AC 1A/230V AC
    Inrush Current (Typ.) Cold start, 20A/115V AC; 40A/230V AC
    Leakage Current <3.5mA / 240V AC
    Protection Overload 105~150% rated output power
    Protection type: Hiccup mode, recovering automatically after fault condition is removed.
    Safety & EMC Safety Standards Approved by Ul1012, UL60950-1, TUV EN60950-1, CCC GB4943
    Withstand Voltage I/P-O/P: 1.5KV AC I/P-FG: 1.5KV AC O/P-FG: 0.5KV AC
    Isolation Resistance I/P-O/P, I/P-FG, O/P-FG: 100M Ohms/500V DC/ 25°C / 70% RH
    EMC Emission Compliance to EN55022 (CISPR22) Class B, EN61000-3-2, -3
    EMC Immunity Compliance to EN61000-4-2, 3, 4, 5, 6, 8, 11, EN55024, light industry level, criteria A
    Environment Working Temperature -10 ~ +60°C (Refer to output load derating curve)
    Working Humidity 20~90% RH (non-condensing)
    Storage Temperature -20~+85°C
    Humidity 10~95% RH (non-condensing)
    Temperature Coefficient ±0.03%/°C (0~50°C)
    Vibration 10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes
    Note 1. All parameters NOT specially mentioned are measured at 230V AC input, rated load and 25°C of ambient temperature.
    2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
    3. Tolerance includes set up tolerance, line regulation and load regulation.
    4. The switching power supply is considered a component which will be installed into final equipment. Please make sure that the final equipment still meets EMC directives.

    50W switching power supply dimensions

    Block Diagram
    switching power supply circuit diagram

    Derating Curve & Static Characteristics
    SDPS derating curve & static characteristics

    Tips: Circuit structure of switching power supply
    Switching power supply is composed of main circuit, control circuit, detection circuit, and auxiliary power supply.

    1. Main circuit
      Amplitude limiter for surge current: limits input surge current when connected to power supply.
      Input filter: filters noise wave of power grid and prevent noise wave generated by the input filter from being fed back to the power grid.
      Rectification and smoothing: make AC rectified into smooth DC.
      Inversion: convert rectified DC into high-frequency AC, which is a core part of high-frequency switching power supply.
      Output rectification and smoothing: provide stable and reliable DC according to load demands.
    2. Control circuit
      Take a sample at output end to make a comparison with set value and regulate output current by changing pulse width or pulse frequency through inverter. Protect power supply according to data provided by test circuit and identified by protective circuit.
    3. Detection circuit
      Specify parameters and instrument data of the protective circuit.
    4. Auxiliary power supply
      Enable software (remote) startup of the power supply. Supply power to the protective and control circuits (PWM and other chips).
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