DMD and DME Series Offers High Capacitance, High Voltage, Very Low ESR, Electrical Double-Layer Technology

Murata Electronics has released thin, low-resistance, electrical double-layer capacitors (EDLCs), the DMD and DME series. Using an innovative design, the EDLCs, also referred to as supercapacitors, do not have traditional dielectric layers, rather they utilize the phenomenon of storing charge in an “electrical double layer” that is formed at the solid-liquid interface. Through optimization of electro chemical properties and advanced packaging, Murata’s DMD and DME series deliver a compact part with a high capacitance, high voltage with very low equivalent series resistance (ESR) over a wide temperature range. Additionally, Murata’s EDLCs offer much higher energy storage and power density than any existing conventional capacitor technology. These features make the Murata DMD and DME series ideal for applications requiring burst or pulse loads, like LED flash, audio circuits and power amplifiers. The ability to deliver peak current assistance to the load allows this product to extend battery life between charges.

Specifically, the DMD and DME products offer low ESR (as little as 30mΩ at 1kHz) and enable high-current, and high charge-discharge rates as well as a high peak voltage of 2.7V per cell and exhibit stable output characteristics over a wide operating temperature range (-30º C to +70º C). Murata is also developing a series with operating temperatures up to +85º C. In addition, these devices are eco-friendly, as they are fully RoHS-compliant. Furthermore, they can be incorporated into non portable equipment for applications ranging from back-up to pulse transmission (solid state drives, smart meters and industrial applications). They deliver maintenance-free power storage with a useful life exceeding 100,000 cycles.

Available in 2.7V and 5.5V options, the 2.7V single cell measures only 20.5mm X 18.5mm X 1.5mm with a 700mF value. The 5.5V double cell comes in a thin 20.5mm X 18.5mm X 3.0mm package in a 350mF value. The EDLC product series will be expanded to include additional values in 2012.