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| 74ACT109资料 | |
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74ACT109 PDF Download |
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File Size : 116 KB
Manufacturer: Description: Due to its high current drive capability, 74ACT109 applications often utilize remote sensing to compensate IR drops in the wiring. The importance of remote sensing increases as accu- racy requirements, output currents, and distance between amplifier and load go up. The circuit above shows wire resistance from the 74ACT109 to the load and back to the local ground via the power return line. Without remote sensing, a 7.5A load current across only 0.05 ohm in each line would produce a 0.75V error at the load. With the addition of the second ratio matched RF/RIN pair and two low current sense wires, IR drops in the power return line become common mode voltages for which the op amp has a very high rejection ratio. Voltage drops in the output and power return wires are inside the feedback loop. Therefore, as long as the Power Op Amp has the voltage drive capability to overcome the IR losses, accuracy remains the same. Applica- tion Note 7 presents a general discussion of PPS circuits. |
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| 1PCS | 100PCS | 1K | 10K | ||
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型 号：74ACT109 厂 家： 封 装： 批 号：01 数 量：1,805 说 明：绝对原装正品底价 |
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