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Si82398AD4-IS Datasheet(PDF) 9 Page - Silicon Laboratories |
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Si82398AD4-IS Datasheet(HTML) 9 Page - Silicon Laboratories |
9 / 38 page 2.3 Power Supply Connections Isolation requirements mandate individual supplies for VDDI, VDDA, and VDDB. The decoupling caps for these supplies must be placed as close to the VDD and GND pins of the Si8239x as possible. The optimum values for these capacitors depend on load current and the distance between the chip and the regulator that powers it. Low effective series resistance (ESR) capacitors, such as Tantalum, are recommended. 2.4 Power Dissipation Considerations Proper system design must assure that the Si8239x operates within safe thermal limits across the entire load range. The Si8239x total power dissipation is the sum of the power dissipated by bias supply current, internal parasitic switching losses, and power dissipated by the series gate resistor and load. Equation 1 shows Si8239x power dissipation. Si8239x Data Sheet System Overview silabs.com | Smart. Connected. Energy-friendly. Rev. 0.9 | 8 |
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