High Noise Immunity Power Management ICs to Combat Against Electromagnetic Noise

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Annoyed by Failing Noise Immunity Testing after Finishing Board Design?

Have you ever experienced a malfunction due to low noise immunity after developing a new application board? This problem can sometimes happen after passing characteristics tests. Finding the cause of the problem can be very expensive and time consuming. If you are lucky, you could locate and identify the components with the problem and then search for suitable replacement parts. However, it is not always so easy or so simple. In the worst case, you may have to redesign the board which is very costly and time consuming. It is difficult to predict how noise will affect the developing application and adding countermeasures is one of the main factors that lead to increase development time and cost.

Without proper noise immunity, electromagnetic noise can cause abnormal function which may lead to injury or fatal accident especially as electronic devices are increasingly used in cars and industrial equipment. Therefore, it is critical that today’s electronic systems take proper precautions to safeguard against unwanted noise.

Importance and Problems on Electromagnetic Susceptibility (EMS)

Everywhere we go, we are surrounded by invisible electromagnetic noise which increases at a high rate with the evolution of electronic devices.

To ensure stable operation of electrical devices under an environment full of electromagnetic noise, there is a growing list of requirements for systems to be equipped with high noise immunity functions. Here are a few examples of common noise immunity requirements: ISO 11452 is an international set of immunity standards and guidelines for automotive electrical components, Transverse Electromagnetic (TEM) call method, and Bulk Current Injection (BCI) method.

If a system cannot pass noise immunity testing, the time and cost would increase due to the need to re-design the circuit and rerouting the wiring patterns of the board.

We have power management ICs which achieve high electromagnetic noise immunity. RICOH ICs can provide stable supply voltage under very harsh environment where noise and various frequency are all around.

The R1525 series and R1526 series are voltage regulators and the R1540 series is a voltage tracker. All three families are high-noise immunity power management ICs developed using Ricoh’s proprietary circuit technology. They can supply a stable voltage even under a wide noise frequency condition of 150 kHz to 1 GHz.

The power supply of an off-board sensor system, for example, needs additional components for noise reduction, as electromagnetic noise generated by the wire harness may affect the sensor’s operation. Our “high-noise-immunity power management ICs” eliminate the need for additional components, which reduces mounting area because power management functions and noise suppression functions are all in one chip.

Who are Ricoh?

RICOH Electronic Devices Co., LTD. is a leading global provider of semiconductor products, offering a comprehensive portfolio of CMOS Analog Power Management ICs and Real Time Clock ICs that enable engineers to design advanced applications for the consumer, industrial, and automotive markets.

Ricoh has an extensive expertise in technologies and solutions including power saving, small footprint, high performance, product longevity program, and high reliability. The company’s headquarters are based in Japan, as well as development, sales and manufacturing facilities. Regional sales and support offices are located in North America, Europe, and Asia.

Want to find out more? Contact us to see how our range of Ricoh products can improve your technology solution.