Archive for tag: SMPS

52W SMPS AC-DC Adapter

Power Supply circuits | By: Diagram mania

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 […]

Power Factor Controller

Power Supply circuits | By: Diagram mania

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 is 450W. The circuit shown  by the schematic diagram below : This is a simple […]

Constant Current Constant Voltage Switching Power Supply

Power Supply circuits | By: Diagram mania

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 is the circuit: The operation of this circuit is simple, When the load impedance is […]

Constant Current Constant Voltage SMPS (Switch Mode Power Supply)

Power Supply circuits | By: Diagram mania

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 voltage will be constant at […]

52W SMPS AC-DC Adapter

Power Supply circuits | By: Diagram mania

This SMPS AC-DC converter gives good efficiency. Test data shows efficiency of 83.2% at 115 Vac input and 6A output current, and 85.4% at 230 Vac input and 6A output current. Moreover, the input voltage range is universal, accommodating 92 to 276 Vac variation with only 24 mV change in the output voltage. Here is […]

450W Power Factor Controller with Universal Input Voltage Range

Power Supply circuits | By: Diagram mania

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 is the schematic diagram of […]

Step-Down Charge Pump Regulator for USB Powered Devices

Power Supply circuits | By: Diagram mania

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 a low cost circuit because […]

High Efficiency Switch Mode 3.3A 10A Regulator

Power Supply circuits | By: Diagram mania

This switch mode regulator circuit has higher current output than  our previous switch mode regulator, but it uses same controller IC. Up to 10A can be served by this switch mode regulator. The output of this regulator circuit is regulated at 3.3 volt, and the input range is 4-9Volt. The SHDN pin can be pulled […]

Miniature Voltage Isolation Provides Positive and Negative Supply

Power Supply circuits | By: Diagram mania

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 conversion for analog circuitry. In […]

28V DC To 5V DC Switch-Mode Converter (Regulator)

Converter and Inverter circuits | By: Diagram mania

This is a 28VDC to 5VDC switching converter circuit.  As a switch-mode voltage regulator, this circuit gives higher efficiency than linear regulator type. Using the National Semiconductor LM1575-5.0, this circuit can be used to convert 28VDC To 5VDC with efficiency of >80%. This circuit can be used as a 5V source @ 1A. Here is […]