IN Brief:
- Four integrated MOSFETs form a full bridge for transformer excitation across 4.5–24 V inputs.
- The RVP007 operates at a nominal 250 kHz or at 75–750 kHz with an external resistor.
- Overcurrent, short circuit and temperature protections are specified; the orderable versions are listed as coming soon.
RECOM has introduced the RVP007 integrated transformer driver, combining four power MOSFETs in a full bridge for isolated power supplies. The IC operates from a 4.5–24 V input and supports designs rated between 1 and 20 W, with the achievable output voltage determined by the transformer and secondary circuitry. It is intended to reduce the number of external switches needed on the transformer’s primary side.
The four MOSFETs alternately energise the transformer primary, allowing electrical energy to pass across the isolation barrier through magnetic coupling. A rectifier and filter on the secondary side then establish the supply output. Integrating the bridge changes the component selection and board layout around the drive circuit, while transformer choice, isolation clearances, capacitors and rectifiers remain part of the complete design. Those external components determine much of the assembly’s physical size and operating limits.
Switching frequency is set through the CLK pin, with a nominal internal frequency of 250 kHz when no programming resistor is fitted. Adding an external resistor permits settings from 75 to 750 kHz. The adjustment gives designers room to balance the size of the magnetics against switching loss and electromagnetic interference. Higher frequency can allow a smaller transformer in a suitable design, although losses in the semiconductor switches, windings and core also change as switching frequency increases.
RECOM also specifies support for LLC resonant applications. The resonant network shapes the voltage and current during energy transfer, creating opportunities to reduce switching loss and electromagnetic interference when its components and operating point are correctly selected. The manufacturer describes the operating mode as a means of improving efficiency, without assigning a single efficiency figure to every possible 1–20 W design. Transformer construction and resonant component tolerances therefore remain relevant to the implemented circuit.
Protection functions include input overvoltage protection, an integrated soft start, continuous short-circuit protection and overtemperature protection with automatic recovery. The product information also states a 2.2 A current clamp and input surge tolerance up to 38 V. Together these functions establish fault-handling limits for the IC itself; the surrounding supply still needs appropriately rated magnetics, rectification and copper paths to withstand its intended operating and abnormal conditions.
Integrated n-channel MOSFETs have a stated resistance of 0.15 Ω, while the p-channel devices are specified at 0.30 Ω. Conduction loss is associated with the resistance and current through each active path, alongside energy dissipated during switching transitions. At the higher end of the intended output-power range, board copper and thermal paths therefore remain significant, even as the four-switch bridge removes components that would otherwise be placed individually around a driver.
The RVP007 uses an ESOP-8 surface-mount package measuring 5 × 6.2 mm, with a stated height of 1.65 mm. RECOM specifies an operating temperature range of −40°C to +125°C. Compact controller packaging can assist with dense auxiliary power rails, but the spacing required across an isolation barrier depends on the transformer, board construction and the end equipment’s electrical requirements. The device’s package dimensions describe the IC rather than the footprint of a finished isolated power module.
Transformer turns ratio and rectifier arrangement establish the relationship between the input and the desired output, while output capacitance influences voltage ripple and transient behaviour. The published 4.5–24 V range applies to the IC input, while secondary regulation and achievable output voltage depend on the transformer, load and external circuitry. Matching magnetics and thermal design to a specified output is especially important when using one controller family across several isolated rails in an industrial system.
The manufacturer positions the device for compact supplies with low standby power requirements, including auxiliary isolated rails. Its product listing currently labels both RVP007 orderable variants as coming soon. Volume procurement and system qualification will follow confirmation of device availability and the final component documentation. Designers can use the stated drive frequency, package and protection limits to begin selecting a transformer and evaluating the surrounding circuit.
