52W SMPS AC-DC Adapter

An AC-DC converter known for its accuracy is the SMPS AC-DC converter. Test data indicates an efficiency of 85.4% at a 230 Vac input with a 6A output current, and 83.2% at a 115 Vac input with the same output current. This converter operates within a universal input voltage range of 92 to 276 Vac, resulting in only a 24 mV change in output voltage. The circuit demonstrates low power consumption, with measurements showing 0.17 W at 230 Vac and 0.07 W at 115 Vac when the power push button PB1 is toggled off. This circuit is designed to produce constant current and constant voltage, making it suitable for efficiently charging a battery, delivering 600 mA in constant current mode and 7.2 V in constant voltage mode. It is also referred to as a power factor controller with a universal input circuit, accommodating input voltages from 90 to 268 Vac, which covers standards for mains supply in nearly all countries. Additionally, a capacitive power supply is a variation of an uninsulated AC to DC adapter, consisting of resistors, capacitors, diodes, and zener diodes to maintain a constant voltage across the capacitor C1. The average input current must equal a specific value for proper operation.

The SMPS AC-DC converter operates by utilizing a switching regulator to convert AC voltage to a stable DC output. The circuit typically includes a transformer to isolate and step down the voltage, followed by a rectifier stage that converts the AC signal to DC. The efficiency ratings of 85.4% and 83.2% indicate that the converter is capable of maintaining high performance across varying input voltages, which is critical for applications requiring reliable power supply under different conditions.

The low power consumption figures of 0.17 W and 0.07 W at different input voltages demonstrate the circuit's efficiency in idle states, making it suitable for applications where energy conservation is a priority. This feature is particularly beneficial in battery-operated devices or energy-sensitive environments.

The constant current and constant voltage characteristics of the converter are essential for battery charging applications, ensuring that the battery receives a steady current until it reaches the desired voltage, preventing overcharging and extending battery life. The output specifications of 600 mA in constant current mode and 7.2 V in constant voltage mode highlight its versatility in various charging scenarios.

The power factor controller aspect of the circuit contributes to improved energy efficiency by reducing reactive power and ensuring that the input current waveform aligns with the voltage waveform, which is essential for compliance with electrical standards.

The capacitive power supply variation mentioned provides a simple and cost-effective solution for converting AC to DC, particularly in low-power applications. By utilizing passive components such as resistors and capacitors, this circuit can achieve a stable output voltage while minimizing component count and complexity.

Overall, the SMPS AC-DC converter represents a robust solution for applications requiring efficient power conversion, low power consumption, and reliable performance across a wide range of input conditions.One AC-DC converter that provides a good accuracy is SMPS AC-DC converter. Test data shows efficiency of 85. 4% at 230 Vac input and 6A output current and 83. 2% at 115 Vac input and 6A output current. This converter has the universal input voltage range. containing 92 to 276 Vac variation with only 24 mV change in the output voltage. picture below shows the circuit: Toggling off PB1 power push button at Vin= 230 Vac resutlt 0. 17W and at Vin= 115 Vac result in 0. 07 W power consumption. this circuit has very low power consumption. [Schematic diagram source: Motorola Analog IC Device Data] This is a circuit that produces constant current constant voltage SMPS. To efficiently charge a battery, we can use constant current constant voltage SMPS. This circuit produces 600 mA at constant current mode and 7. 2V at constant voltage mode. Here Continue reading †’. This circuit is called power factor controller with universal input circuit. It has input range about 90 to 268Vac. Any standards of mains supply in almost any country would be under that range. Maximum load of this power factor controller Continue reading †’. Capacitive power supply is one variation of uninsulated AC to DC adapter. This circuit consist of resistor, capacitors, diode and zener diode. This circuit will allow the constant voltage to across C1. The input current`s average should be equal to Continue reading †’. When the source of the sound is only intermittently exist, it`s better to turn on the tape recording only when it really present.

We can control a tape recorder to switch a tape recorder on when audio is present by Continue reading †’. All types of transistors including Darlington and power will be tested in this project. Connect the 9v battery around the other way at points A and B to test PNP types. The transformer in the photo is a 10mH choke Continue reading †’. 🔗 External reference