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TDA2SA Datasheet(PDF) 354 Page - Texas Instruments |
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TDA2SA Datasheet(HTML) 354 Page - Texas Instruments |
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354 / 427 page  PCB_CPD_5 354 TDA2SX, TDA2SG, TDA2SA TDA2HG, TDA2HV, TDA2HF, TDA2LF SPRS951F – DECEMBER 2015 – REVISED MAY 2019 www.ti.com Submit Documentation Feedback Product Folder Links: TDA2SX TDA2SG TDA2SA TDA2HG TDA2HV TDA2HF TDA2LF Applications, Implementation, and Layout Copyright © 2015–2019, Texas Instruments Incorporated Table 8-9. PCB Etch Resistance Breakdown - From Power Inductor to Device Load (continued) Net[from] Component [from]: Net[to] Component [to]: Etch Resistance (Ω) % of Total Etch Resistance vdd_mpu R181 vdd_mpu U52 0,006311 90% vdd_mpu R181 vdd_mpu U52 0,006311 92% vdd_mpu R181 vdd_mpu U52 0,006311 92% Total Etch Resistance = 0,007007 100% Total Etch Resistance = 0,006852 100% Total Etch Resistance = 0,006837 100% Max Value = 0,007007 Table 8-10. PDN Effective Resistance - From PMIC Source to Device Load PDN Elements PDN Effective Resistance (Ω) % of Total Etch Resistance Etch 0,008045 89% Inductor 0 0% Sense Resistor 0,001 11% Max PDN Effectiv Resistance from Source 0,009045 100% IR Drop: vdd_mpu (PCB RevJan14, Sentinel PSI) • Source Conditions: 1.22V @ 5,12A • Recommended Reff < 10mΩ • Reff = Total Trace Resistance + Sence Resistor = 8,04mΩ + 1mΩ = 9,04mΩ • Voltage / IR Drop: 1,22 - 1,179 = 52,6 mV Figure 8-25. vdd_mpu Voltage/IR Drop [All Layers] Dynamic analysis of this PCB design for the MPU power domain determined the vdd_mpu decoupling capacitor loop inductance and impedance vs frequency analysis shown below. As you can see, the loop inductance values ranged from 1.0 to 1.4nH and were less than maximum 2.0nH recommended. |
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