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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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CY8C52LP bảng dữ liệu(PDF) 29 Page - Cypress Semiconductor |
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CY8C52LP bảng dữ liệu(HTML) 29 Page - Cypress Semiconductor |
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29 / 114 page  PSoC® 5LP: CY8C52LP Family Datasheet Document Number: 001-84933 Rev. *L Page 29 of 114 Figure 6-6. Application of Boost Converter powering PSoC device The boost converter may also generate a supply that is not used directly by the PSoC device. An example of this use case is boosting a 1.8 V supply to 4.0 V to drive a white LED. If the boost converter is not supplying the PSoC devices VDDA, VDDD, and VDDIO it must comply with the same design rules as supplying the PSoC device, but with a change to the bulk capacitor requirements. A parallel arrangement 22 µF, 1.0 µF, and 0.1 µF capacitors are all required on the Vout supply and must be placed within 1 cm of the VBOOST pin to ensure regulator stability. Figure 6-7. Application of Boost Converter not powering PSoC device The switching frequency is set to 400 kHz using an oscillator integrated into the boost converter. The boost converter can be operated in two different modes: active and standby. Active mode is the normal mode of operation where the boost regulator actively generates a regulated output voltage. In standby mode, most boost functions are disabled, thus reducing power VBOOST VBAT VSSB IND VDDD VDDA VDDIO0 VSSA VSSD Boost Logic VDDIO1 VDDIO2 VDDIO3 0.1 µF 0.1 µF 0.1 µF 0.1 µF 22 µF 0.1 µF 0.1 µF 1.0 µF 1.0 µF 22 µF 4.7 µH 10 µH 22 µH Schottky, 1A VDDD 0.1 µF 1.0 µF All components and values are required 0.5–3.6 V PSoC External Load VBOOST VBAT VSSB IND VDDD VDDA VDDIO0 VSSA VSSD Boost Logic VDDIO1 VDDIO2 VDDIO3 22 µF 4.7 µH 10 µH 22 µH Schottky, 1A VDDD All components and values are required 0.5–3.6 V 22 µF 0.1 µF 1.0 µF VDDA, VDDD, and VDDIO connections per section 6.2 Power System. VOUT PSoC External Load |
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