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Double Output Open Frame Power Supply
The function of switching power supply is to convert a standard voltage into the current or voltage required by the user through different forms of architecture. The switching transistor used by the switching power supply switches between the fully open mode (saturation zone) and the fully closed mode (cut-off zone). Both modes have the characteristics of low dissipation. The conversion between switching will have high dissipation, but the time is very short. Therefore, it saves energy and produces less waste heat. Switching power supply itself will not consume electric energy.
Description
Description
PCB and assembly for Double output open frame power supply.
The switching power supply uses the principle of pulse width modulation. The control mode is to control the on-off of the switching devices of the inverter circuit, so that the output end can get a series of pulses with equal amplitude, which can be used to replace the sine wave or the required waveform.
Multiple pulses are generated in the half cycle of the output waveform, so that the equivalent voltage of each pulse is sinusoidal waveform, and the output is smooth and less low-order harmonics. Modulating the width of each pulse according to certain rules can not only change the output voltage of the inverter circuit, but also change the output frequency.
Specification
Universal input range 80-264VAC
Efficiency up to 94%
2 "x 3" open compact
100W natural convection
130W with fan cooling
Active PFC function
Continuous short circuit protection
No load input power consumption < 150MW
Working altitude 5000m
Comply with IEC / en / UL 60601-1 2 MOPP, IEC / EN60335-1
Safety IEC / en / UL 62368-1
EMI safety complies with class I and class II 
Our open frame power supply advantages:
1. Highly reliable circuit topology: the circuit topology adopts very mature active power factor compensation circuit + LLC half bridge resonant circuit, and the power factor compensation also adopts quasi resonant soft switching technology. The switching MOS tube and rectifier diode work in soft switching state, which effectively reduces the generation of electromagnetic interference and greatly reduces the generation of harmonics, The voltage stress and switching loss of components are reduced, and the efficiency and reliability of power supply are improved.
2. High quality components: the control chips of active power factor compensation circuit and LLC half bridge resonant circuit are the most stable, reliable and perfect control chips of ST company, which have been widely used in the field of LCD TV. The electrolytic capacitors with high temperature, high frequency, low internal resistance and long service life are all used. Other components are high-quality components of well-known brands at home and abroad.
3. Excellent electrical performance: high efficiency, high power factor, low EMI, low harmonic, low temperature rise and long service life.
4. Perfect protection functions: output short-circuit protection, output overvoltage protection and power over-temperature protection.
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