Optocoupler is an electronic component that has a light source at its input side and a light detector or sensor in its output side. A light source is a LED while the detector or sensor is a phototransistor. It is also called as optoisolator, photocoupler or optical isolator. This device is considered as a current controlled current source. This is
READ
Rectifier is an electrical circuit that converts AC to DC. It is either half wave or full wave. A half wave rectifier consists of a single diode only. There are two types of full wave rectifier. One is the bridge type and the other one is the center tap type. Bridge rectifiers have four identical diodes connected in bridge. On
READ
The right way to measure power supply efficiency must consider four important factors such as: (1) Use the right measuring tools (2) Sample the parameters correctly (3) Use short connections (4) Give some time before taking measurements Use the Right Measuring Tools Efficiency is the ratio of output power to input power. The output power is composed of DC voltage
READ
Introduction LLC Resonant Converter is a good topology for DC-DC conversion due to its soft switching feature. The current in primary switching devices will only flow when the voltage is zero. This is zero voltage switching or ZVS. An ideal LLC will operate at resonance. At resonance, the switching frequency is equal to the tank circuit resonant frequency. The tank
READ
In some applications especially those involving high current may need more than one diode in parallel. For DIY projects like for personal consumption or school projects, this could be acceptable. However, in talking with professional product development wherein the quality and reliability are the focus, parallelling diodes is highly discouraged. This article will discuss the 2 main reasons why it
READ
High side driver refers to an electronic switch that is configured to switch a supply voltage. It is commonly used in applications wherein the power source of a circuit is electronically controlled on and off by other circuits like a microcontroller. High side switch could be implemented by using BJT or MOSFET. IGBT could be an option as well but
READ
Flyback Converter diode is acting like a switch linking the transformer secondary and the load. When the primary switch is ON, the primary will store energy. This time the diode will be reversed biased. Meaning, the load side will be cut off from the transformer. On the other hand, when the primary switch is off, the stored energy will be
READ
Several factors to consider in order to perfectly arrived a good Quasi Resonant Flyback transformer design. It needs to consider the input voltage and the allowed level of the switch drain to source (or collector to emitter) voltage of the switch to define the level of the reflected voltage (Vref). It is also required to know the level of the
READ
The key to deriving the current levels of every switching converter knows the type of waveforms. For flyback converter, the primary and secondary current waveforms are in triangular shape. Another important aspect is to know the operation of a QR flyback. The complete operation of a QR flyback is here. The current wave shape is could be summarized as: The
READ
The importance of DFMEA in product development is cannot be underestimated. It is an analysis that is good for both product robustness and overall safety. However, this design tool is not adopted by all product developers. The main reason is that this tool is maybe time consuming and needs a highly experienced design engineer to do so. DFMEA Definition DFMEA
READ