поискавой системы для электроныых деталей |
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SIC531 датащи(PDF) 10 Page - Vishay Siliconix |
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SIC531 датащи(HTML) 10 Page - Vishay Siliconix |
10 / 17 page SiC531, SiC531A www.vishay.com Vishay Siliconix S15-2799-Rev. A, 30-Nov-15 10 Document Number: 65999 For technical questions, contact: powerictechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 PCB LAYOUT RECOMMENDATIONS Step 1: VIN / PGND Planes and Decoupling 1. Layout VIN and PGND planes as shown above. 2. Ceramic capacitors should be placed directly between VIN and PGND, and very close to the device for best decoupling effect. 3. Different values / packages of ceramic capacitors should be used to cover entire decoupling spectrum e.g. 1210, 0805, 0603, 0402. 4. Smaller capacitance values, placed closer to the devices, VIN pin(s), results in better high frequency noise absorbing. Step 2: VSWH Plane 1. Connect output inductor to IC with large plane to lower resistance. 2. VSWH plane also serves as a heat-sink for low-side MOSFET. Make the plane wide and short to achieve the best thermal path. 3. If any snubber network is required, place the components as shown above and the network can be placed at bottom. Step 3: VCIN / VDRV Input Filter 1. The VCIN / VDRV input filter ceramic cap should be placed as close as possible to the IC. It is recommended to connect two capacitors separately. 2. VCIN capacitor should be placed between pin 2 and pin 3 (AGND of driver IC) to achieve best noise filtering. 3. VDRV capacitor should be placed between pin 20 (PGND of driver IC) and pin 21 to provide maximum instantaneous driver current for low side MOSFET during switching cycle. 4. For connecting VCIN to AGND, it is recommended to use a large plane to reduce parasitic inductance. Step 4: BOOT Resistor and Capacitor Placement 1. The components need to be placed as close as possible to IC, directly between PHASE (pin 5) and BOOT (pin 4). 2. To reduce parasitic inductance, chip size 0402 can be used. VIN VSWH PGND VIN Plane PGND Plane PGND Plane VSWH Snubber PGND Cvcin Cvdrv AGND Cboot Rboot |
Аналогичный номер детали - SIC531 |
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Аналогичное описание - SIC531 |
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