Tongxin Microelectronics (Shanghai) Co., Ltd. released the first class D audio amplifier chip GSI8166 with 2x3W stereo and anti-breaking function.
In the case of 4Ω load and 5V power supply, it can achieve 3W X 2 output power and more than 85% conversion efficiency. GSI8166 adopts the unique ESF (EMI Suppression FuncTIon) technology and structure of Tongxin Microelectronics, so it greatly reduces EMI and thus reduces the interference of the class D amplifier on the system. Advanced anti-breaking technology enables the chip itself to achieve automatic gain adjustment to ensure perfect sound quality when playing music. GSI8166 has up to -75dB PSRR, THD + N as low as 0.04% and 95dB SNR. GSI8166 is available in 20L QFN / TSSOP package. It can be widely used in mobile phones, DVD players, notebooks, digital photo frames and speakers. GSI8166 has been officially mass-produced, and has now accepted orders and samples.
A type of Auto Lamp that used quartz as glass shell and filled with halogen gas gives a very bright light. Principle is inside the halogen bulb such as injection of iodine or bromine, under high temperature, the sublimation of chemistry with halogen tungsten filament, tungsten will be cooled to solidification on tungsten filament, form balanced circle, avoid premature tungsten filament fracture. So halogen bulbs live longer than incandescent bulbs. The supply voltage of halogen lamp is usually divided into ac 220V and dc 12V and 24V. The halogen lamp is made of tungsten, but it is enclosed in a smaller quartz glass shell. Because the glass is very close to the filament, if it's made by normal glass, it will melt very easily. The gas in the glass is composed of different gases. These gases have a very interesting feature. They are combined with tungsten vapor. If the temperature is not high enough, the halogen gas combines with the tungsten vaporization and redeposition of the filament. This cycle makes the filament can last more time. Halogen bulb is hotter than a normal bulb.
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