Tag Archives: SMPS

High Efficiency Switch Mode 3.3V 5A Step-Down Converter

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This switch mode step-down converter has very good efficiency, up to 94% can be obtained. This switch mode regulator uses LTC1266-3.3 controller with external N-Channel power mosfet, and need only a 5uH inductor because it uses high frequency switching. Here is the schematic diagram of this switch mode step down… Read more »

Transformerless, Switch Mode Boost Regulator, A Step-Up Converter

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Using this switch mode regulator circuit, you can get a stable 12 volt output (500mA) although you just have 4,3 – 10V power supply. You can even boost a 3.5V input to 12V if the load draws only 100 mA or less. This switch mode voltage regulator use LTC1266 IC… Read more »

Constant Current Constant Voltage SMPS (Switch Mode Power Supply)

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This constant current constant voltage  SMPS can be used to efficiently charge a battery. This circuit gives 7.2V at constant voltage mode, and 600 mA at constant current mode. Here is the schematic diagram of the circuit: The mechanism is simple, when the load impedance is high, then the output… Read more »

Miniature Voltage Isolation Provides Positive and Negative Supply

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The development of miniature low-power (<2-W) DC/DC converters is growing rapidly because of the hot growth in distributed-power architecture. This application minimize the converter’s impact onboard space. This device is very useful for safety-critical applications such as medical equipment, and telecommunications, and industrial applications because it provides point-of-use isolated power… Read more »

450W Power Factor Controller with Universal Input Voltage Range

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This power factor controller accept voltage from 90 to 268 Vac,  that’s why we call it power factor controller with universal input, since any standards of mains supply  in almost any country would fall within that range. This power factor controller is capable of handling up to 450W load. Here… Read more »

52W SMPS AC-DC Adapter

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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… Read more »

Step-Down Charge Pump Regulator for USB Powered Devices

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this is a circuit of Step-Down Charge Pump Regulator for USB Powered Devices. The critical design parameter of this circuit is the circuit area. To solve this problem we can use Charge pump step-down circuit. This circuit only requires   the charge pump controller and  four ceramic capacitors. So it is… Read more »