It can be difficult to correct for power factor in converters that have different conduction modes. A special technique can make corrections smoothly. By Joel Steenis, Alex Dumais, MICROCHIP TECHNOLOGY, INC. DESIGNERS of power factor correction (PFC) circuits will invariably notice distortion as the input current approaches zero. The distortion problem becomes progressively worse at […]
Converters
8-kVA ac inverter carries integral Li-ion battery charger
Phihong has released a compact, portable 1.8kVA inverter with an integral battery charger designed with four standard lithium-ion (Li-ion) battery packs. Designed to provide original equipment manufacturers with reliable, energy-efficient, and cost-effective power solutions, the new inverter is engineered to deliver 120Vac at 16A/1.8kVA (continuous) for operating power tools, and features a 40A peak current […]
SMD DC-DC converters offer 1.5 kV isolation
XP Power today announced three high-performance ranges of surface mount (SMD) DC-DC converters rated at 1, 3 and 6 Watts of output power with single and dual outputs. The ISB series provides 1W of output power, the ISC 3W and the ISX is a 6W converter. The small size of the converters takes up less […]
Top power electronics threads on EDAboard.com – September
(editor’s note: Intrigued by these power electronics problems? Have a question or optional solution? Then click the “Read more” link and follow the conversation on EDAboard.com or log in to EDAboard and participate in the forum thread.) Small vs. larger SMT ceramic capacitors and internal inductance? – We are doing a 65A, 1V5 SMPS using […]
Converter for 48/12-V vehicle dual-battery systems handles more current
Linear Technology Corporation announces the LTC3871, a 100V/30V bidirectional two-phase synchronous buck or boost controller, ideal for 48V/12V automotive dual battery systems. Current 12V automotive systems are reaching their 3kW power limit due to the ever-increasing demand for more electrical devices. A newly proposed standard, LV148, combines a secondary 48V bus with the existing 12V […]
Wide-input-Range 15-W DC-DC Converters Have Six-Sided Shielding
TDK Corporation announces the introduction of the TDK-Lambda 15W CCG15S series of DC-DC converters, further extending the CCG product family. Operating over a 4:1 input range, these highly efficiency products are enclosed in a 1 inch by 1 inch six-sided shielded metal case. Applications include telecommunications, process control, broadcast, battery powered and test and measurement […]
Smallest 6-W encapsulated DC-DC converter comes in DIP-16 package
MINMAX announces the new MDWI06 series of 6W Isolated / Regulated DC-DC Converters in the smallest 16 pin DIP package measuring only 0.94 x 0.54 x 0.31” where space is critical. The MDWI06 family of high-density dc-dc converters consists of 14 models offering 9-36 / 18-75 VDC Input Ranges with single and dual output models […]
Digitally programmable buck-boost regulator targets battery-powered mobile devices
Fairchild launched its most advanced digitally programmable buck-boost regulator for the power supplies used in smartphones, tablets and other battery-powered mobile devices. The FAN49103 regulator joins the rest of the popular FAN49100 family in meeting the critical requirements of these power supplies by combining the highest power density, the smallest solution size, the tightest transient […]
How to select input capacitors for a buck converter
by Maniing Xie, System Application Engineer, Power Design Systems, Texas Instruments Electromagnetic interference (EMI) can create serious issues for manufacturers in an industrial environment. A buck converter generates a pulsating ripple current with high di/dt at the input. Without input capacitors, ripple current is supplied by the upper power source. Printed circuit board (PCB) resistance […]
Isolated flyback-type dc/dc converter control ICs for high-power inverters
ROHM has recently announced the availability of isolated flyback-type DC/DC converter control ICs for inverters in high power industrial equipment such as FA/solar inverters and power storage systems. Isolation is almost always built into electronic equipment to provide protection against shock and damage. High voltage, high power industrial applications (including power storage systems and solar […]
