usbํ—ˆ๋ธŒ ์ถœ๋ ฅ์ด ํฌํŠธ๋‹น 5v 1.5a๋˜๋ฐ ์ด๊ฑธ๋กœ ์ถฉ์ „ํ•ด๋„ ๊ดœ์ฐฎ์Œ?