ROHM has recently announced the availability of an optical heart rate sensor for smart bands and watches capable of measuring blood pressure...
ROHM has recently announced the availability of dual-input boost-buck charging ICs that support 1 to 4 battery cells for notebook PCs...
Many of today's portable devices (i.e. smartphones and tablets) are driven by single-cell li-ion batteries that deliver an output of approximately 4.2V at full charge. However, when connecting to interfaces requiring 5V output, such as USB, HDMI, and audio amps for speakers, a DC/DC converter is needed to boost the voltage. At the same time, longer battery life along with greater efficiency are demanded in a smaller form factor.
In response, the BD1865GWL features a lower operating limit of 2.5V, prolonging battery life in devices by extending operation down from the conventional 2.7V. In addition, two operating modes are built in, PWM/PFM mode and ROHM's original mixing PWM mode.
The former ensures up to 90% efficiency across all load regions, while the latter prevents unwanted switching noise in audio applications. The BD1865GWL is also capable of delivering output currents up to 2A in a compact 1.6mm x 1.6mm package, contributing to greater end-product miniaturization.
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