| DN436微型全橋壓電馬達(dá)驅(qū)動器 | |
| 所屬分類：電路圖 | |
| 上傳者：serena | |
| 標(biāo)簽： 馬達(dá)驅(qū)動器 DN436 | |
| 所需積分：1分積分不夠怎么辦？ | |
| 文檔介紹： Piezoelectric motors are used in digital cameras for autofocus,zooming and optical image stabilization. Theyare relatively small, lightweight and effi cient, but theyalso require a complicated driving scheme. Traditionally,this challenge has been met with the use ofseparatecircuits, including a step-up converter and an oversizedgeneric full-bridge drive IC. The resulting high componentcount and large board space are especially problematicin the design of cameras for ever shrinking cell phones.The LT3572 solves these problems by combining astep-up regulator and a dual full-bridge driver in a 4mm × 4mm QFN package. Figure 1 shows a typical LT3572Piezo motor drive circuit. A step-up converter is usedto generate 30V from a low voltage power source suchas a Li-Ion battery or any input power source within thepart wide input voltage range of 2.7V to 10V. The highoutput voltage of the step-up converter, adjustable upto 40V, is available for the drivers at the VO | |
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