Should I Use a Tantalum or Class II MLC Capacitor in My Circuit?

Posted by Victor Lu on Apr 7, 2021 9:00:00 AM

Today, a wide variety of capacitors with a range of features are available, which can make it difficult for circuit designers and electrical engineers to determine the best fit for their application. To add to the confusion, there is somewhat of a misconception today that some capacitors, such as tantalum and Class II MLCCs, are interchangeable. But this is not always the case. Each capacitor type has distinct advantages and disadvantages that are important to understand to ensure you choose the right technology to best meet the needs of your specific application requirements. This post provides a brief overview of these two capacitor types as well as a variety of factors to consider when making your capacitor selection.

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Topics: Capacitor

Introducing the Highest Voltage, Smallest Footprint SLC on the Market – The V80 Bypass Capacitor

Posted by Cheriyan Perumal on Mar 31, 2021 9:00:00 AM

As RF and microwave systems require higher performance in a small footprint, designers and engineers need to get more out of every component, including capacitors. To meet these demands, Knowles Precision Devices has expanded its line of single-layer vertical electrode (V Series) capacitors to include the 100nF V80 Bypass Capacitor. The V80 is a revolutionary development for capacitors as it is the first SLC to feature an operating voltage of 50V in .084” x .042” package. The closest competitor product at this size is only rated for 16V.

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Topics: Capacitor

Build-to-Print Basics Part 11: Ensuring Reliable Connections with Supported Bridges and Solder Dams

Posted by Tim Bice on Mar 24, 2021 7:00:00 AM

To provide a better understanding of build-to-print in general and the breadth of our offerings, as well as how our thin-film technology can benefit your applications, we’ve put together a Build-to-Print Basics series. Part 11 covers how we work with solder, solder masks, and supported bridges in the thin-film components we design and develop.

You can have a beautifully designed circuit, but if you can’t reliably connect the various components within the circuit, your beautiful design is negated. Let’s look at some of the materials and techniques Knowles Precision Devices uses for soldering and bridging, and how we handle these techniques as circuit complexity increases.

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Topics: Build to Print

Meet Safety Requirements at Higher Voltages with New Safety-Certified MLCCs

Posted by Steve Hopwood on Mar 17, 2021 7:00:00 AM

With our new expanded range of enhanced safety-certified multilayer ceramic capacitors (MLCCs), Knowles Precision Devices now offers a unique combination of capability and safety certification for electronic device applications. These new surface-mount MLCCs comply with international UL60384-14 and EN60384-14 specifications and can be used instead of leaded film capacitors in AC-DC power supplies where a lightning strike or other voltage transients represent a threat to the electronic equipment.

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Topics: Capacitor, High Reliability

Understanding the Impact of ESR on Ceramic Capacitor Selection

Posted by Victor Lu on Mar 10, 2021 7:00:00 AM

In an ideal world, capacitors could be designed in a way where they would exhibit no resistance. However, this is physically impossible to achieve as there will always be some type of internal resistance in a capacitor that appears in series with the capacitance of the device. Known as equivalent series resistance (ESR), the level of this resistance will vary across capacitors depending on a variety of factors including the dielectric materials used, frequency of the application, leakage, and quality and reliability of the capacitor. The two graphs in Figure 1 show an example of how ESR can change as frequency increases across various capacitances on two different classes of ceramic dielectrics.

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Topics: Capacitor, High Reliability

Looking Closer at Filter Capacitors in Electric Vehicles

Posted by Peter Matthews on Mar 3, 2021 7:00:00 AM

In electric vehicle (EV) applications, filter capacitors are a special type of component commonly used as input and output capacitors. Also known as noise suppression or electromagnetic interference (EMI) filters, these particular capacitors act to remove noise and other unwanted signals on the line. On the high voltage alternating current (AC) side of a system, the capacitors often provide EMI filtering, whereas on the direct current (DC) side of a subsystem, they serve to smooth ripple components of the AC and filter out noise.

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Topics: Capacitor, Automotive, Electric Vehicles

Build-to-Print Basics Part 10: Resistors

Posted by Tim Bice on Feb 24, 2021 10:42:00 AM

To provide a better understanding of build-to-print in general and the breadth of our offerings, as well as how our thin-film technology can benefit your applications, we’ve put together a Build-to-Print Basics series. Part 10 covers our key design parameters for resistors as well as our standard layouts.

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Topics: Build to Print

Balancing Performance with Compact Quadrature Hybrid Couplers

Posted by Dave Thibado on Feb 17, 2021 10:42:00 AM

Quadrature hybrid couplers are basic building blocks for many RF and microwave systems. For these couplers, the input splits into two output signals, of equal magnitude, with a 90 degree phase difference. Quadrature hybrid couplers provide improved input match for unbalanced loads. Energy splits evenly between outputs, and some energy is reflected back due to mismatch. For example, in Figure 1, there is a 90 degree phase difference between the two outputs, so the energy reflected at point A is 180 degree out of phase and cancels at the input port. At point B, the energy is in phase and sums at the isolated port, which is terminated.

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Topics: RF and Microwave

Build-to-Print Basics Part 9: Vias

Posted by Tim Bice on Feb 10, 2021 10:41:00 AM

To provide a better understanding of build-to-print in general and the breadth of our offerings, as well as how our thin-film technology can benefit your applications, we’ve put together a Build-to-Print Basics series. Part 9 covers the various strategies that can be used for adding vias into circuits.

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Topics: Build to Print

Part 2: Know Today’s RF Filtering Trends to Better Meet the Needs of Tomorrow’s RF Design Jobs

Posted by Jared Burdick on Feb 3, 2021 9:00:00 AM

In part one of our two-part RF filter trends series, we discussed several emerging trends effecting the “jobs” RF filters need to perform. In this second part, we expand on these trends by digging into more of the technical trends and providing an overview of the filtering solutions that can help RF filter designers stay on top of those trends.

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Topics: RF and Microwave, Filtering

Insights Into Precision Passive Devices

Knowles Precision Devices is a premier global source for Capacitors, RF Filters, EMI Filters, Resonators, non-magnetic components and advanced dielectric materials. An umbrella for the brands of Compex, DLI, Johanson MFG, Novacap, Syfer and Voltronics, Knowles Precision Devices serves a variety of markets including military, aerospace/avionics, medical equipment, implantable devices, EMI and connector filtering, oil exploration, instrumentation, industrial electronics, automotive, telecoms and data networks.

This Blog will provide insights into:

  • Filters for 5G and mmWave
  • Capacitors for High Voltage
  • Capacitors for High Reliability

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