Slide1 l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 22

NIC COMPONENTS CORP. PowerPoint PPT Presentation


  • 161 Views
  • Uploaded on
  • Presentation posted in: General

LOW ESR CAPACITORS FOR HIGH CURRENT APPLICATIONS NIC COMPONENTS GUIDELINE 012002. NIC COMPONENTS CORP. LOW LOSS CAPACITORS FOR HIGH CURRENT APPLICATIONS. Increasing Need for Lower ESR Capacitors. Industry trends for next generation systems…. Industry trends for next generation systems…

Download Presentation

NIC COMPONENTS CORP.

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Slide1 l.jpg

LOW ESR CAPACITORS

FOR

HIGH CURRENT APPLICATIONS

NIC COMPONENTS GUIDELINE 012002

NIC COMPONENTS CORP.


Slide2 l.jpg

LOW LOSS CAPACITORS FOR

HIGH CURRENT APPLICATIONS

Increasing Need for Lower ESR Capacitors

Industry trends for next generation systems…

  • Industry trends for next generation systems…

  • Higher Speed of Operation (1Ghz & up)

  • Industry trends for next generation systems…

  • Higher Speed of Operation (1Ghz & up)

  • Lower Voltage of Operation (sub 2VDC)

  • Industry trends for next generation systems…

  • Higher Speed of Operation (1Ghz & up)

  • Lower Voltage of Operation (sub 2VDC)

  • Higher Current of Operation (40A & up)

  • Industry trends for next generation systems…

  • Higher Speed of Operation (1Ghz & up)

  • Lower Voltage of Operation (sub 2VDC)

  • Higher Current of Operation (40A & up)

  • Tighter Regulation Windows*

40A

15A

5A

Increasing Current

Decreasing Voltage

of Operation

  • Low Voltage – High Current Requirements

  • Applications:

  • Voltage Converters (AC/DC, DC/DC)

  • Voltage Regulators

  • Servers and Workstations

  • High Current, Ultra-fast Transient Microprocessors

5.0V

3.3V

2.5V

1.3V

* Careful attention to circuit noise budget can ensure reliable system operation and immunity to dreaded intermittent noise faults

NIC COMPONENTS CORP.


Slide3 l.jpg

LOW LOSS CAPACITORS FOR

HIGH CURRENT APPLICATIONS

C

ESR

I

IR

Pd = Power Dissipated (lost) within the Capacitor

Pd = I2 x ESR

Lower capacitor ESR = Lower Pd

  • Low ESR capacitors helps to reduce the total circuit energy used!

  • Less heat dissipation within the capacitor means it lasts longer!

  • Longer life & better reliability!

NIC COMPONENTS CORP.


Slide4 l.jpg

LOW LOSS CAPACITORS FOR

HIGH CURRENT APPLICATIONS

2.8V +0.1 -0.06V

Intel is identifying maximum

ESR of output filter capacitors

to meet output voltage regulation limits

Allowable Variation Window

VDC

Ripple Voltage(Vr)

Vr = I x ESR

INTEL VRM8.2

Voltage Regulator Module

2700uF/10VDC/0.034 ESR max.

Low ESR Capacitor

NIC SMT version:NACZF332M16V18X22TR(0.028 Z)

NIC LEADEDversion:NRSZ272M10V12.5X25(0.032 Z) NRSX272M10V12.5X25(0.029 Z)

When used in output filter

Lower capacitor ESR = Lower output ripple voltage (Vr)

NIC COMPONENTS CORP.


Slide5 l.jpg

LOW LOSS CAPACITORS FOR

HIGH CURRENT APPLICATIONS

Noise budgets help maintain signal integrity in low-voltage systems

An ideal power supply has zero output impedance across all frequencies and load currents. However, the inductances associated with cables, bus bars, connectors, pc boards, and IC packages introduce impedances that increase with frequency.

Thus, an IC's supply voltage is not rock-solid.

Bulk, or low-frequency, decoupling is the first layer of defense against unwanted impedances. This decoupling keeps the load voltage from drooping when there is a step change in current at the load, that's too short for the power supply to respond. You need enough capacitance to supply all the charge required by the ICs during this time without letting the power-bus voltage droop below the limit allowed by your power noise budget, (Delta)V.

Greg Edlund is a principal hardware engineer at Digital Equipment Corp (Maynard, MA), where he does signal-integrity engineering for the Alpha server project. Edlund was formerly a member of the team that designed the SS-1 supercomputer. He holds a BS in physics from the University of Minnesota Institute of Technology (Twin Cities).

NIC COMPONENTS CORP.


Slide6 l.jpg

LOW LOSS CAPACITORS FOR

HIGH CURRENT APPLICATIONS

Noise budgets help maintain signal integrity in low-voltage systems

The first layer of defense:

To get…”enough capacitance to supply all the charge” required by the circuit…

Typically, designers use electrolytic cans (Radial & SMT) at the PCB power entry point (Output filter of the power supply)and spread tantalum & ceramic capacitors across the board.

Important issue:

“if your design requires a large amount of low- or mid-frequency current, place a local dc/dc converter near the loads. This local power source cuts the bus inductance and leaves only the pc-board and IC-package inductances.“

DC– DC Converters use Low ESR Capacitors in output filters

Low ESR = Lower voltage fluctuation

NIC COMPONENTS CORP.


Slide7 l.jpg

LOW LOSS CAPACITORS FOR

HIGH CURRENT APPLICATIONS

Selecting By-Pass – Decoupling Capacitors

To minimize line voltage fluctuation under high load current conditions Low ESR bypass- decoupling capacitors are required.

Lower capacitor ESR = Lower voltage fluctuation

NIC COMPONENTS CORP.


Low esr polymer cathode tantalum electrolytic capacitors l.jpg

LOW LOSS CAPACITORS FOR

HIGH CURRENT APPLICATIONS

LOW ESR POLYMER CATHODETANTALUM ELECTROLYTIC CAPACITORS

Market & Technology: Use of POLYMER in place of MnO2 for CATHODE results in low ESR, high ripple current ratings (RCR) and suppression of combustion (will not support flame) under failure. Applications in high density low voltage – high current power management designs. Larger sizes C & D/V cases continue to be popular. Expansion will cover all sizes P ~ D/V. New NTP series parts developed include lower ESR 0.025-ohm products, and we will achieve 0.020 ohm later in 2002.

Higher Conductivity of polymer results in reduced ESR

Conductive polymer (polypyrrole) cathode (replaces manganese dioxide) for low ESR – high ripple current applications.

Comparison of Conductivity


Slide9 l.jpg

LOW LOSS CAPACITORS FOR

HIGH CURRENT APPLICATIONS

LOW ESR POLYMER CATHODETANTALUM ELECTROLYTIC CAPACITORS

Comparison of Capacitance over Temperature

NIC COMPONENTS CORP.


Slide10 l.jpg

LOW LOSS CAPACITORS FOR

HIGH CURRENT APPLICATIONS

LOW ESR POLYMER CATHODETANTALUM ELECTROLYTIC CAPACITORS

10uF / 16VDC ALUMINUM

10uF / 6.3VDC TANTALUM

10uF / 6.3VDC P/N: NTP100M6.3TRA

100uF / 16VDC P/N: NTP101M16TRD

Comparison of ESR over Temperature

NIC COMPONENTS CORP.


Polymer electrolyte solid aluminum electrolytic capacitors l.jpg

POLYMER ELECTROLYTESOLID ALUMINUM ELECTROLYTIC CAPACITORS:

NSP Series

also see www.lowESR.com

Technology:

Replacement of liquid electrolyte with SOLID POLYMER results in ultra low ESR and high RCR with long life at high temperature. Primarily used in low profile high current – low voltage power management applications. Same size as D/E (7343) tantalum lends itself to replacing multiple chip tantalum types. Lowest 100KHz ESR (0.012ohm) and highest RCR (3.0Arms) of all SMT E-Caps. Higher capacitance low ESR parts are expected to dominate production in future. Higher capacitance values (330uF / 2VDC) Lower profile version (1.5mm max thick) special will be available for height restrictive applications.


Slide12 l.jpg

LOW LOSS CAPACITORS FOR

HIGH CURRENT APPLICATIONS

Surface Mount Aluminum Electrolytic Capacitors

MOLDED FLAT CHIP SOLID ALUMINUM

NSP Series

NIC COMPONENTS CORP.


Slide13 l.jpg

LOW LOSS CAPACITORS FOR

HIGH CURRENT APPLICATIONS

Surface Mount Aluminum Electrolytic Capacitors

MOLDED FLAT CHIP SOLID ALUMINUM

P/N: NSP220M6.3TR

22uF / 6.3VDC

Impedance

ESR & Impedance (Ohm)

ESR

Sub 0.020 ESR

Frequency

NIC COMPONENTS CORP.


Slide14 l.jpg

SOLID ALUMINUM ELECTROLYTIC CAPACITORS:

New Products

NSPZ Series - Low ESR Solid Aluminum

Electrolytic Capacitors in SMT V-Chip

» Capacitance values from 15uF ~ 680uF

» Voltage ratings form 4 ~ 25VDC.  » Case sizes (DxL) include:

  • 6.3mm x 6.3mm

  • 8mm x 7mm

  • 10mmx 8mm

NIC Components continues to address the growing needs for low ESR capacitors with the release of the NSPZ series of surface mount (SMT) solid polymer electrolyte aluminum electrolytic capacitors. NSPZ series features:

  • Ultra-low ESR and impedance (as low as 0.025ohm)

  • High ripple current ratings (up to 2.5Arms; +105ºC/100KHz)

  • Ideally suited for lower voltage - high current power management applications, including dc-dc converters and switchers.

    Rated for operation at temperatures between -55 ~ +105ºC and are compatible with reflow soldering processes. The devices are supplied in tape-and-reel packaging for use with automated pick-and-place manufacturing systems. 


Slide15 l.jpg

SMT ALUMINUM ELECTROLYTIC CAPACITORS:

HYBRID ELECTROLYTE

NSPE Series - Low ESR Hybrid Electrolyte Electrolytic Capacitors in SMT V-Chip

» Capacitance values: 22uF ~ 820uF

» Voltage ratings: 4 ~ 16VDC 

» Case sizes (DxL) include:

  • 6.3mm x 6.3mm

  • 8mm x 10.8mm

  • 10mm x 10.8mm

Featuring the low ESR characteristics of solid electrolyte types, but at lower cost, NIC's new hybrid (solid -liquid electrolyte) NSPE series of surface mount (SMT) aluminum electrolytic capacitors provide cost effective solution for power management applications. NSPE series uses combination solid polymer and liquid electrolyte toreduce the ESR characteristic and increase the ripple currentrating. NSPE series features low ESR and impedance (as low as

0.023ohm) with high ripple current ratings (up to 2.18Arms;+105ºC/100KHz).

Ideally suited for lower voltage - high current power management applications, including power supplies, dc-dc converters and switchers. Rated for operation at temperatures between -55 ~ +105ºC and are compatible with reflow soldering processes.


Slide16 l.jpg

SMT ALUMINUM ELECTROLYTIC CAPACITORS:

HYBRID ELECTROLYTE - ESR over Frequency Comparison

NSPE Series - Low ESR Hybrid Electrolyte Electrolytic Capacitors in SMT V-Chip

SMT Aluminum Electrolytic Capacitors V-Chip style 100uF / 6.3VDC values shownStandard Liquid Electrolyte (BLUE LINE) and Hybrid  [Solid - Liquid] Electrolyte (RED LINE)  Hybrid Electrolyte [ NSPE Series ] exhibits significantly lower ESR over wide frequency range 


Slide17 l.jpg

SMT ALUMINUM ELECTROLYTIC CAPACITORS:

HYBRID ELECTROLYTE - ESR over Temperature Comparison

NSPE Series - Low ESR Hybrid Electrolyte Electrolytic Capacitors in SMT V-Chip

SMT Aluminum Electrolytic Capacitors V-Chip style 100uF / 6.3VDC values shownStandard Liquid Electrolyte (BLUE LINE) and Hybrid  [Solid - Liquid] Electrolyte (RED LINE)  Hybrid Electrolyte [ NSPE Series ] exhibits significantly lower ESR over wide frequency range  

SMT Aluminum Electrolytic Capacitors V-Chip style 100uF / 6.3VDC values shownStandard Liquid Electrolyte (BLUE LINE) and Hybrid  [Solid - Liquid] Electrolyte (RED LINE)  Hybrid Electrolyte [ NSPE Series ] exhibits less change over temperature and significant improved at low temperatures  


Slide18 l.jpg

NEW TECHNOLOGY COMPONENTS:

New Product

Niobium Electrolytic Capacitors

Niobium is one of the alternatives being considered to replace tantalum in capacitors - as tantalum becomes less available and human rights issues are raised about some of its African sources. Estimates, niobium is over 100 times more plentiful than tantalum (less than 1/10th the cost). NIC’s NBP series has same construction as conductive polymer cathode tantalum (NIC NTP Series). It is anticipated that in the future, niobium capacitors will be used for high-capacity devices (up to 1000µF), which are too costly to produce using tantalum.

NIC’s niobium capacitor at a glance

Specifications:

Rated Voltage2.5V

Capacitance220uF

Size(D) 7.3 x 4.3 x 2.8mm

ESR0.055ohms

Part NumberNBP series (specifications in development)

Samples Now

Production Early 2002


Slide19 l.jpg

NEW TECHNOLOGY COMPONENTS:

Niobium Electrolytic Capacitors


Slide20 l.jpg

NEW TECHNOLOGY COMPONENTS:

Niobium Electrolytic Capacitors


Slide21 l.jpg

REFERENCE: September 2001 - PRODUCT HIGHLIGHT - EPN

Low ESR capacitors come to the foreThere is a rapidly increasing demand for low equivalent series resistance (ESR) capacitors in a small case, surface mount format. But what exactly is ESR, why is it important and what products are on offer to satisfy the market's hunger for these devices?

ESR is an abbreviation for Equivalent Series Resistance, the characteristic representing the sum of resistive (ohmic) losses within a capacitor. While ESR is undesirable, all capacitors exhibit it to some degree. Materials and construction techniques used to produce the capacitor all contribute to the component's ESR value. ESR is a frequency dependent characteristic, so comparison between component types should be referenced to same frequency. Industry standard reference for ESR is 100kHz at +25°C. Power dissipation within the capacitor, and the effectiveness of the capacitor's noise suppression characteristics will be related directly to the ESR value.Why do we need low ESR? An industry wide trend towards lower voltage, higher current circuit design, fuelled by lower voltage silicon devices is causing designers to specify capacitors with minimal ESR. Higher levels of functionality in today's designs mean that despite voltage levels falling, circuit power levels have not dropped accordingly. Ohms law tells us, in very simple fashion, that at the same power dissipation level, lower voltage operation will mean higher current levels. This greatly increases the demands on the power management circuit (power supply or DC/DC converter) to deliver energy during periods of high current load stepping. Lower voltage circuit operation also imposes greater restrictions upon the output voltage variation levels. The output capacitors or capacitor bank, used in the power management circuit, need to exhibit low ESR characteristics. Ripple voltage (noise) on the output supply voltage will be directly proportional to the ESR of the capacitors used. By considering the formula: Vr = I x R, where Vr is the ripple voltage and R is the ESR, we can see that if the current (I) increases from, say, 4A to 20A then the ripple voltage will also increase by a factor of five. Increased ripple voltage (Vr) cannot be tolerated in today's and next generation designs. This is driving the demand for lower ESR capacitors.


Slide22 l.jpg

TECHNOLOGY:

What's on Offer? The high capacitance values (typically greater than 100uF) that are needed to supply energy to the circuit during high load current stepping, are most often achieved through the use of multiple SMT electrolytic capacitors. Surface mount devices are often preferred to leaded parts as they simplify PCB assembly and allow closer component placement. Low ESR SMT electrolytic capacitors mainly fall into four categories. Liquid electrolyte, vertical can chip aluminium electrolytic capacitors offer the highest values of capacitance and low ESR. They tend to be low cost, but have case sizes that are large compared to other constructions.Solid electrolyte, resin encapsulated flat chip aluminium electrolytic capacitors feature reduced ESR, very high ripple current ratings and reduced size at a higher cost. Solid 'dry' electrolyte also greatly extends the operational life of the component when used at high temperature. Solid electrolyte, resin encapsulated flat chip MnO2 cathode tantalum electrolytic capacitors again offer low ESR. They are produced with a manganese dioxide cathode construction. Solid electrolyte, resin encapsulated flat chip polymer cathode tantalum electrolytic capacitors are available as ultra-low ESR versions. These are produced using a speciality polymer cathode construction. The Standard manganese dioxide cathode (MnO2) being replaced by a highly conductive polymer (polypyrrole) cathode that considerably reduces ESR. Indeed, the conductivity of polypyrrole is more than 100 times that of manganese dioxide.Circuit designs incorporating lower voltage semiconductors and ICs are driving increasing demand for better and lower ESR capacitors. SMT low ESR type electrolytic capacitors offer the combined solution of high capacitance, to supply energy during high-speed load stepping, and low ESR to reduce the output filter ripple (noise) voltage to meet the needs of today's and tomorrow's power management design challenges.


  • Login