Austrian power electronics company RECOM GmbH, long a leading global manufacturer of DC/DC power conversion modules, is building a new portfolio of power integrated circuits and surface-mount device transformer ICs that enable design engineers to create their own discrete DC/DC isolated power supplies. The move is taking shape in a flurry of related new product developments by the company.
“For over 50 years, RECOM has been a technology leader in DC/DC modules, a position only maintained by a constant flow of new ideas and continual improvements in quality, reliability and performance. Now, for the first time, RECOM is offering you both IC discrete solutions as well as complete DC/DC modules,” comments Sven Krumpel, Project Manager IC & Solutions.
The range of power ICs and SMD transformers includes transformers compatible with flyback, push-pull and full bridge drivers in the power range from 1W to 30W. Standard sub-miniature SMD transformers cover the most common input-output voltage combinations and isolation withstand voltages up to 5000VAC/min.
The RMR series are sub miniature 1W/2W toroidal SMD transformers designed for push-pull or full bridge topology transformer drivers, with isolation voltages from 1.5kVDC/min up to 4.5kVDC/min. The RBE series are 6W to 30W bobbin-type SMD transformers designed for flyback topology transformer drivers, with isolation voltages from 1.5kVDC/min up to 6kVDC/min. or 4.5kVAC/min.
Three different topology transformer drivers are part of the rollout – flyback, push-pull, and full bridge, integrated and external MOSFET secondary side rectification solutions, and a range of standard sub-miniature SMD transformers that cover the most common input/output and isolation voltages.
The RVPW series flyback power ICs are available with either integrated switches or with a gate drive output for an external MOSFET. These wide input voltage range regulated ICs are unique in having three different feedback modes on the same pin: Primary Side Regulation: where the output is regulated by monitoring the primary side waveform to avoid the need for an optocoupler, Secondary Side Regulation, where the output is regulated by optocoupler feedback to maintain the isolation, or Direct DC monitoring for non-isolated applications. The RVP Push-Pull and Full-Bridge transformer drivers are suited well for cost sensitive open loop DC/DC isolated converters.
A new range of rectifier ICs includes a fully integrated full-bridge rectifier with smart output-voltage limiting that occupies less board space than 4 diodes, and a rectification controller IC for use with an external FET, suitable for either high-side or low-side rectification. The RVS002 integrates two N-channel MOSFETs and two Schottky diodes in a DFN2*2 package to create a low-loss full bridge rectifier capable of handling up to 3W. The RVSY018 synchronous rectification controller operates at up to 700kHz, with an ultra-fast 30ns turn on and 10ns turn off characteristic, making it well suited for high-frequency power conversion applications.
The range also includes the RVP6501, a pin-compatible second-source alternative to the company’s 6501-type push-pull transformer driver IC. The new IC operates from a 2.8V to 6VDC supply voltage but can withstand 10V transients without damage. It delivers 500mA across the entire input voltage range which exceeds the 6501-type specification of 300mA at 5V and 150mA at 3.3V.
Like the 6501-type, it features break-before-make switching, but unlike the original, it detects the gate drive voltages to adaptively adjust the dead time spacing to automatically compensate for any thermal, load current, and aging drift in the gate threshold voltage. In addition, it monitors the transistor current to provide continuous short-circuit and overload protection. These two features avoid the risk of flux imbalance core saturation, one of the main disadvantages of the push-pull topology. For more info, see www.recom-power.com.
