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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RT8113 датащи(PDF) 20 Page - Richtek Technology Corporation |
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RT8113 датащи(HTML) 20 Page - Richtek Technology Corporation |
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20 / 21 page  RT8113 20 DS8113-02 April 2011 www.richtek.com The voltage feedback loop contains two traces, VCC and VSS, which are Kelvin sensed from CPU socket or output capacitors. These two traces should have 10mm width and be placed away from high (di/dt) switching elements such as high-side MOSFETs, low-side MOSFETs, phase plane etc. The circuit elements of voltage feedback loop, such as feedback loop short resistors and voltage loop compensation RCs, have to be kept near the RT8113 and also away from switching elements. The current-sense mechanism of the RT8113 is fully differential Kelvin sense. Therefore, the current-sense loop of the RT8113 contain two traces : the positive trace(ISP) comes from the positive node the of output inductor (the node connecting phase plane) and the negative trace (ISN) comes from the negative node of the output inductor (the node connecting output plane). DO NOT connect the current-sense traces from the phase plane or output plane. Only connect these traces from both sides of the output inductor to achieve the goal of precise Kelvin sense. The current-sense feedback loops have to be routed away from switching elements, and the current-sense RC elements have to be put near their respective ISN or ISP pins of the RT8113 and also away from noise switching elements. At lease 10 mm width is suggested for current sense feedback loops. |
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