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    48V DC 4.2A 200W Switching Power Supply

    200W switching power supply converts AC input to DC at a stable voltage of 24V DC and rated current of 4.2A, and it is high efficiency, high reliability, competitive price and wide applications.
    SKU: ATOS-200-48
    Free shipping
    Delivery date: 6-12 days


    • AC input range selectable by switch
    • Protections: short circuit, overload and overvoltage
    • Forced air cooling by built-in DC fan
    • Cooling by free air convection


    Basics Model ATOS-200-48
    Dimension 199*110*50mm (L*W*H)
    Weight 0.8kg
    MTBF 286.7K hrs min. MIL-HDBK-217F (25°c )
    Output DC Voltage 48V
    Rated Current 4.2A
    Current Range 0~4.2A
    Rated Power 200W
    Ripple & Noise (max.)( Note 2) 240mVp-p
    Voltage Adjust Range 43~53V
    Voltage Tolerance (Note 3) ±1.0%
    Line Regulation ±0.2%
    Load Regulation ±0.2%
    Setup, Rise, Holdup time 100ms, 50ms, 20ms at full load
    Input Voltage Range 88~132V AC/176~264V AC(selected by switch) or 248~370V DC
    Frequency Range 47~63Hz
    Efficiency(Typ.) 87%
    AC Current 3.2A/115V AC; 1.6A/230V AC
    Inrush Current (max.) Cold start 35A
    Leakage Current <3.5mA / 240V AC
    Protection Overload 105~150% rated output power
    Protection type: Shut down O/P voltage, re-power on to recover
    Overvoltage 55.2 ~ 64.8V
    Protection type: Shut down O/P voltage, re-power on to recover
    Safety & EMC Safety Standards Approved by Ul1012, UL60950-1, TUV EN60950-1
    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
    EMI Conduction & Radiation Compliance to EN55022 (CISPR22) Class B
    EMS IMMUNITY Compliance to EN61000-4-2, 3, 4, 5, 6, 8, 11; ENV50204, EN55024, Light industry level, criteria A
    Environment Working Temperature -10 ~ +60°C
    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 power supply is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives.

    Tips: How to lower ripple nose of switching power supply?

    1. Strengthen the inductor and filtering of output capacitor
      According to a formula about the switching power supply, current fluctuation in the inductor forms up an inverse relationship with the inductance. In addition, output ripples constitute inverse relationship with capacitance. Increase of inductance and output capacitance can reduce ripples, but the measure just plays a minor role.
    2. Secondary smoothing means adding another LC filter
      LC filter performs well in inhibiting noise ripples. To reduce ripples, users shall select appropriate inductors and capacitors to form up a filter circuit according to frequency of ripples to be removed.
    3. Connect switching power supply output to LDO filter
      It serves as an effective way to reduce ripples and noises. This method can help users maintain a constant voltage without changing original feedback system, but it brings about highest costs and energy consumption.
    4. Connect capacitor C or RC to diode in parallel
      Values of capacitor C or RC connected to the diode in parallel can be determined only by repeated experiments. If the values are set in a false way, it may cause serious oscillating.
    5. Diode post inductance (EMI filter)
      It is a common way to curb high-frequency noise. Users need to select appropriate inductors according to frequency of noise. This method can effectively inhibit noise, but it shall be noticed that the rated current of inductors must comply with actual demands.
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