Datasheet > CLG03P025L12

CLG03P025L12

更新时间： 2022-05-09 10:27:48

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Super Capacitors To Improve Power Performance.

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CLG03P025L12 数据手册

Voltage Drop

Two main factors affect the voltage drop of all capacitors including EDLC's.

The first voltage drop is defined as the Ohmic voltage drop

The capacitor has an internal resistance defined as ESR (Equivalent Series Re-

sistance).

As current flows through the capacitor, a voltage drop occurs that obeys Ohms

law. This voltage drop is instantaneous and will diminish the

moment that no current is drawn.

The second voltage drop (capacitance related voltage drop) is due to

capacitor discharge.

The voltage of the capacitor is directly proportional to the charge

accumulated in the capacitor. During current discharge, capacitance is

consumed (current emitting from the capacitor) thus causing a linear

voltage decrease in the capacitor. When the current is stopped, the voltage of the

capacitor indicates the charge left in the capacitor. The combination of the Oh-

mic related voltage drop and the capacitance related voltage drop determine the

actual working voltage window of an EDLC under drain conditions (Fig. 4).

V₁

V₂

V₃

Voltage

window

t₁

t₂

Pulse width

Fig. 4

Ohmic voltage drop = V₁-V₂=I_pulse*ESR

Capacitance related voltage drop = V₂-V₃= I_pulse*(t₂-t₁)/C

Working voltage window = V₁-V₃= I_pulse*ESR+ I_pulse*(t₂-t₁)/C

*Where C is Capacitance

Revision: 21-3-10

Subject to change without notice

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