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Low ESR Capacitors (Tech support: tpmg@niccomp.com)
Ohm's law gives us I = P/V If within an electronic circuit the operation voltage (V) decreases (example from 5V to 2.0V or 1.0V) and the power (P) stays the same (example 20W) we see that circuit current (I) level rises from (4Amp to 10A or 20A respectively). This greatly increases the requirements on the "power management" circuit (power supply or DC/DC converter) to supply high current at low voltage. The output capacitor (or capacitor bank) will have a ripple voltage (seen as noise on the supply voltage) proportional to the ESR of the capacitor (or capacitor bank). V = I X R ... Ripple voltage = Current X ESR If the current increases from 4A to 20A, within a circuit, the ripple voltage will increase by a factor of FIVE. This increased noise cannot be tolerated, so the ESR of the capacitors must be reduced. Compounding the need for low ESR further, is the reduced circuit (silicon) tolerance to voltage variation (noise and line droops).
![]() TECHNOLOGY FEATURE HYBRID ELECTROLYTE Features: + Lower ESR & Reduced ripple voltage than standard liquid electrolyte e-caps + Improved performance over temperature + Reduces number of components required per board ...Less PC Board Space used & lower assembly costs
Presented - Published: IPC/JEDEC / CARTS Europe / PCI Magazine |
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NIC Low ESR Capacitors
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| Low ESR Capacitor Resources: Articles & Papers | ||||
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