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    15V DC 20A 300W Switching Power Supply

    15V DC 20A 300W switching power supply can convert universal AC input to DC, cooling by built-in DC fan, and it is high price-effective, reliability with industry standards with a wide range of applications.
    SKU: ATOS-300-15
    Free shipping
    Delivery date: 6-12 days


    • Univeral AC input/Full range
    • Protections: short circuit, overload and overvoltage
    • Forced air cooling by built-in DC fan
    • PWM control and regulated
    • 100% full load burn-in test
    • Low cost


    Basics Model ATOS-300-15
    Dimension 215*115*50mm (L*W*H)
    Weight 1.07kg
    MTBF 234.3K hrs min. MIL-HDBK-217F ( 25°c )
    Output DC Voltage 15V
    Rated Current 20A
    Current Range 0~20A
    Rated Power 300W
    Ripple & Noise (max.)( Note 2) 150mVp-p
    Voltage Adjust Range 13.5~18V
    Voltage Tolerance (Note 3) ±1.0%
    Line Regulation ±0.5%
    Load Regulation ±0.5%
    Setup, Rise, Holdup time 200ms, 50ms, 20ms at full load
    Input Voltage Range 90~132V AC/180~264V AC(selected by switch) or 254~370V DC
    Frequency Range 47~63Hz
    Efficiency(Typ.) 78%
    AC Current 6.5A/115V AC; 4A/230V AC
    Inrush Current (max.) 50A/115VAC 50A/230VAC
    Leakage Current <3.5mA / 240V AC
    Protection Overload 105~150% rated output power
    Protection type: Hiccup mode, recovers automatically after fault condition is removed
    Overvoltage 18V~21V
    Protection type: Hiccup mode, recovers automatically after fault condition is removed
    Safety 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
    Environment Working Temperature -10 ~ +50°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
    Fan on/ off Control RTH3 ≥65°C FAN ON, ≤55°C FAN OFF, ≥80°C output shutdown
    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.

    Tips: Differences of switching power supply and linear power supply in working modes
    Power devices of linear power supply operate in linear status. In other words, the power devices never stop once started, so they perform poorly in terms of their working efficiency which proves to be 50-60%. As required by its working mode, linear power supply must be equipped with a step-down transformer to help it complete the transformation from high voltage to low voltage. Then, the voltage would be output as DC voltage through rectification. Its working mode determines its poor performance in size, efficiency and calorific value. However, the linear power supply also has advantages. It generates less noise due to less ripples and satisfactory adjustment rate. The linear power supply is applicable to artificial circuit and various amplifiers.
    Power devices of switching power supply operate in switching status with fast frequency (power devices switch at a frequency of 100-200 KHz and the module power supply operates at a frequency of 300-500 KHz). Their switching status improves performance of switching power supply in power loss and working efficiency. However, it comes up with higher requirements for transformers. The transformers applied to switching power supply must be made of materials with high magnetic conductivity. They are designed to achieve an efficiency of 80-90%. The switching power supply is characterized by higher efficiency and smaller size, but it appears poorer than linear power supply in terms of ripples and adjustment rates of voltage or current.

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