Advanced Analogic (AnalogicTech) recently introduced a three-output charge pump regulator - the AAT2820 for battery-powered portable products. To meet the market demand for TFT LCDs and CCD image sensors, this power management device provides three adjustable output voltages for opening the gate drive bias (Vpos), closing the gate voltage bias (Vneg) and logic voltage. Both the Von and Voff output voltages use an external diode and a capacitor multiplier to regulate the output. Because the AAT2820 does not use high inductance, it is possible to design ultra-thin products with a height of only 0.8mm. The AAT2820's switching frequency is 1MHz, allowing designers to use ultra-small external capacitors. It incorporates a soft-start circuit that prevents the device from being damaged by oversized inrush current during startup. Its low-power shutdown feature disconnects the load from Vin, reducing quiescent current to less than 0.1μA. Its thermal protection circuit turns off all charge pumps when the die temperature exceeds a preset value.
Double Disc Grinding And Polishing Machine
Grinding and polishing are the same mechanical movement, the principle is the same. But for surface quality, the surface finish of polishing is higher than that of grinding. In fact, polishing fluid can be said to be the last process of grinding, grinding and polishing can be realized on the same plane polishing machine at the same time. Grinding is divided into rough grinding, fine grinding, polishing is divided into rough throwing, fine throwing. Most of the time, we have three processes to process the surface quality of products: rough grinding, fine grinding, fine polishing. With these three processes, the workpiece surface flatness, parallelism, roughness is quite high. Some customers do not have such high accuracy requirements, especially roughness requirements are not so high, so they only use the first two processes, or the fine grinding process. Specific to see the quality of the workpiece surface itself, as well as customer requirements to achieve the quality.
Double Disc Grinding And Polishing Machine,Disk Polishing Machine,Bench Grinder Buffing Machine,Bench Polisher And Grinder
TROJAN (Suzhou) Technology Co., Ltd. , https://www.trojanmaterials.com