© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com

T2018_T528 • 5/8/2017

66

T528 Low ESL Polymer Electrolytic for CPU/GPU Decoupling

Derating Guidelines

Voltage Rating

Maximum

Recommended

Steady State

Voltage

Maximum

Recommended

Transient Voltage

(1 ms – 1 µs)

−55°Cto105°C

2V≤V

90%ofV

R

V

R

V

Ripple Current/Ripple Voltage

PermissibleACripplevoltageandcurrentarerelatedto

equivalentseriesresistance(ESR)andthepowerdissipation

capabilitiesofthedevice.PermissibleACripplevoltage

whichmaybeappliedislimitedbytwocriteria:

1.ThepositivepeakACvoltageplustheDCbiasvoltage,

ifany,mustnotexceedtheDCvoltageratingofthe

capacitor.

2.ThenegativepeakACvoltageincombinationwith

biasvoltage,ifany,mustnotexceedtheallowablelimits

specifiedforreversevoltage.SeetheReverseVoltage

sectionforallowablelimits.

Themaximumpowerdissipationbycasesizecanbe

determinedusingthetableatright.Themaximumpower

dissipationratingstatedinthetablemustbereducedwith

increasingenvironmentaloperatingtemperatures.Referto

thetablebelowfortemperaturecompensationrequirements.

Temperature Compensation Multipliers

for Maximum Ripple Current

T≤45°C

45°C<T≤85°C

85°C<T≤125°C

1.00

0.70

0.25

T= Environmental Temperature

The maximum power dissipation rating must be reduced with increasing

environmental operating temperatures. Refer to the Temperature

Compensation Multiplier table for details.

KEMET

Case Code

EIA

Case Code

Maximum Power

Dissipation (P max)

mWatts at 45°C

with +30°C Rise

B

3528-20

127

W

7343-15

325

Z

7343-17

325

UsingthePmaxofthedevice,themaximumallowablerms

ripplecurrentorvoltagemaybedetermined.

I(max) = √P max/R

E(max) = Z √P max/R

I = rms ripple current (amperes)

E = rms ripple voltage (volts)

P max = maximum power dissipation (watts)

R = ESR at specified frequency (ohms)

Z = Impedance at specified frequency (ohms)

Maximum Transient Voltage

Recommended Application Voltage

50%

55%

60%

65%

70%

75%

80%

85%

90%

95%

100%

−55

25

85

105

Temperature (°C)