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データシートサーチシステム |
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データシートサーチシステム |
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W-6238TD-GT3 データシート(PDF) 11 Page - Copal Electronics |
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W-6238TD-GT3 データシート(HTML) 11 Page - Copal Electronics |
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11 / 14 page  W-6238 © NIDEC COPAL ELECTRONICS CORP. 11 Doc. No. MD-5019 Rev. D Characteristics subject to change without notice BOARD LAYOUT The W-6238 is a high-frequency switching regulator. The traces that carry the high-frequency switching current have to be carefully laid out on the board in order to minimize EMI, ripple and noise in general. The thicker lines on Figure 3 show the switching current path. All these traces have to be short and wide enough to minimize the parasitic inductance and resistance. The loop shown on Figure 3 corresponds to the current path when the W-6238 internal switch is closed. On Figure 4 is shown the current loop, when the W-6238 switch is open. Both loop areas should be as small as possible. Capacitor C1 has to be placed as close as possible to the VIN pin and GND. The capacitor C2 has to be connected separately to the top LED anode. A ground plane under the W-6238 allows for direct connection of the capacitors to ground. The resistor R1 must be connected directly to the GND pin of the W-6238 and not shared with the switching current loops and any other components. Figure 3. Closed-switch Current Loop Figure 4. Open-switch Current Loop Figure 5. Recommended PCB Layout W-6 W-6238 |
同様の部品番号 - W-6238TD-GT3 |
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同様の説明 - W-6238TD-GT3 |
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