1752-L24BBB
1752-L24BBB
1752-L24BBB
虽然充电器需要通过若干项产品,但对于共模噪声并没有什么相关的要求。2010年,一批手机OEM厂商就制定通用规范EN62684达成共识,用以管理充电器在频率范围内可允许的大峰值对峰值电压。该规范要求充电器产生的噪声不得过1Vpp(从1kHz到100kHz),而在100kHz频率以上则要求更低的电压强度。典型的选配市场充电器并不遵循这一指导性要求。
虽然较低噪声的充电器产生的噪声在1–5Vpp之间,但噪声较高的充电器的波动范围则达到20–40Vpp,这就会产生巨量电荷转移。注入电荷的量取决于噪声的电压幅度(Q=C*V)。虽然噪声量很大,但触摸屏控制器仍必须能检测到引发幅度较小的电荷变化的手指。
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Allen Bradley SLC 100 Expansion Unit 1745-E101
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