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Lily's Blog

The Wireless Charging Coil Charges The Wearable Devices

Since the advent of fitness trackers and smart watches, the wearable devices are designed to protect them from environmental influences. As a result of the internal integration of a variety of sensors within the sensor (GPS, radio broadcast reception) to be frequently charged, without plug the wireless solution is ideal. The coil has been adapted to fit the existing standard chip wireless charging coils conforming to the…


Posted on April 18, 2017 at 2:02am

Audio Toroidal Transformer Shielding Layer Production

Shielding, you can use metal foil (copper foil) wrapped around the line, both ends of the gap (both ends can not short circuit!), Copper and local connection, or with enameled wire plus a layer, one end of the idle, one end Connect with local. Shielding layer increases, to take up the transformer core window capacity, therefore, the thickness of copper foil or enameled wire diameter, try to use the minimum thickness or minimum diameter; shielding layer increases, but also makes the…


Posted on April 5, 2017 at 1:11am

The Leakage Inductance Of The SMPS Transformer

Any transformer there is leakage inductance, but the leakage inductance of the SMPS transformers on the switching power supply performance indicators is particularly important. Due to the existence of switching transformer leakage inductance, when the control switch off the moment will produce back electromotive force, easy to switch the device over-voltage breakdown; leakage inductance and the circuit can be…


Posted on March 3, 2017 at 12:45am

Field Analysis of PFC Inductor

1. In close to the maximum input voltage when the PFC inductors began to ring, listen to the sound frequency at 100HZ; this situation is generally self-supply winding voltage amplitude is low, reaching ZCD feet less than 1.4V (L6562A), resulting in MOS tube is not open , After this period of time, only to open, so there will be 100HZ sound, as shown in the picture, increase the number of self-power cycle can be.

2. Loop…


Posted on March 2, 2017 at 2:10am

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