PRODUCT UPDATE 27 www.power-mag.com Issue 3 2023 Power Electronics Europe The Epcos B43657 aluminium electrolytic capacitor series have high ripple current capability of up to 8.54A (120Hz, 60°C). The capacitors achieve a service life of at least 2000 hours at a maximum operating temperature of 105°C, claims TDK. They also cover a rated voltage range from 450 to 475V DC with capacitance values from 120 to 1250?F. The compact capacitors are offered in case sizes as low as 22 x 25mm up to 35 x 60mm. They are designed with snap-in terminals for ease of installation. The RoHS-compatible capacitors are intended for use in high-end switchedmode power supplies and power supplies for industrial and telecommunications applications. In addition, they are well-suited for UPS (uninterruptible power supplies), photovoltaic inverters and frequency converters. Designers can perform a lifetime calculation under application-specific conditions using the online AlCap Tool. High density capacitors exhibit high ripple current capability High density DC/DC converter is medical grade per minute for 250V AC working voltage. Creepage and clearance distance from input to output is more than 8mm. The devices also have patient leakage current of 4.5µA maximum to suit medical B, BF, and CF applications. Design features include an industry standard pinout, on/off control, remote sense, and output voltage trimming with full protection against overtemperature, output overloads, short circuits and input under-voltage. Operation to zero load is possible. Light load efficiency is high and quiescent and standby current is low, adds the company. The REM60-W series operates at up to 5000m altitude and for a pollution degree 2 (PD2) environment. It is reliable, at over 1Mhrs MTBF according to MIL-HDBK-217F, 25°C, ground benign conditions. It is certified to IEC/EN 60601-1 3rd edition, ANSI/AAMI ES60601-1 and CAN/CSA-C22.2 No. 60601-1:14 for the North American markets and complies with EN 60601-1-2 for EMI immunity for medical equipment. It is also certified to IEC/UL/EN 62368-1 certifications for IT/multimedia markets. EMC standards EN 55032 Class A and B can be met with a simple external filter. The DC/DC converters are covered by a three-year warranty. Samples are available from all authorised distributors, or directly from Re The REM60-W is available with two input ranges : 9.0 to 36V DC, and 18 to 75V DC and with a selection of tightly regulated single and dual outputs (5V, 5.1V, 12V, 15V, 24V /-12V, and /-15V). The DC/DC converter has a case size of 57.9 x 36.8 x 12.7mm. According to Recom, this delivers industry-leading power density for a 60W part. Efficiency peaks at over 90%. Operating temperature range is 105°C ambient with derating. The REM60-4824SW model, for example operates at 83°C at full 60W output power with 2m/s airflow. The REM60-W series has reinforced / 2MOPP isolation and is rated 5kV AC Infineon introduces OptiMOS power MOSFETs to PQFN 2x2 mm2 portfolio The new OptiMOS 6 power MOSFET 40V (ISK057N04LM6) with 5.7mΩ RDS(on) and OptiMOS 5 power MOSFETs 25 V (ISK024NE2LM5) and 30V (ISK036N03LM5) with 2.4mΩ and 3.6mΩ RDS(on), respectively, are available in the improved PQFN 2x2 mm? package and can be ordered now. The two new power MOSFETs are claimed to be best in class OptiMOS power MOSFETs to achieve a small footprint and with higher power density for layout routing flexibility and overall system size reduction. The OptiMOS 6 40V and OptiMOS 5 25V and 30V power MOSFETs are intended for applications such as synchronous rectification in switched mode power supplies (SMPS) for servers, telecomms and portable and wireless chargers, as well as electric speed controllers for small brushless motors in drones. Infineon says the new OptiMOS 6 40 V and OptiMOS 5 25V and 30V power MOSFETs offer leading-edge silicon technology, package reliability and superior thermal resistance (R thJC, max = 3.2 K/W) in the small PQFN 2x2mm? package. They combine low on-resistance RDS(on) with what Infineon says are industry-leading figures of merit (FOMs, Q G and Q OSS) for “outstanding dynamic switching performance”. The low switching and reduced conduction losses ensure optimal energy efficiency and power density, and also simplify thermal management, adds the company. The compact PQFN package outline allows smaller, more flexible geometric outlines for end-user applications, continues Infineon. The MOSFETs also require less need for paralleling in a design which “significantly” reduces space and system cost.
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