The LM4962 is 5mm x 5mm and has a built-in boost converter that drives the capacitive load of the ceramic speaker and also drives the stereo speakers. In addition, the chip has an audio power amplifier that supports mono ceramic speakers. It uses a 3.2V DC power supply to provide 15V peak-to-peak voltage for bridged loads (BTL) without total harmonic distortion and noise (THD+N) of more than 1%. In addition, the LM4962 chip features overcurrent protection and overvoltage protection to protect the boost converter. The built-in DC/DC converter features a soft-start function.
The LM4953 is an audio amplifier that can drive a ceramic speaker with a charge pump, requiring only eight external components. The LM4953 is available in a 3mm x 4mm package, but with an audio amplifier and charge pump built in, it can boost the 3.6V supply voltage and provide a peak-to-peak voltage of up to 12.6V for a 2uF + 30W bridge load. Wave distortion and noise will not exceed 1%.
Both speaker drivers feature a low-power shutdown mode and internal thermal shutdown protection without the need for a startup capacitor or transient voltage suppression circuit, as well as a “switch/switch†noise suppression circuit. Their unity gain is very stable and can be configured with an external gain setting resistor.
Lifting Shower Hinges are a kind of hinges which use lifting sleeve to lift. The up and down Lift Shower Door Hinges are divided into left and right opening two kinds. They use different lifting sleeves to distinguish left and right opening directions. Lift Off Hinges can also be lifted up by 4-4.5mm. Lift Up Hinge is also suitable for uneven ground. When the ground is slightly inclined to the right, it is necessary to choose the left-side lifting hinges. When the Lifting glass hinge are raised in parallel, they will not touch the ground or glass.
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