Interesting Reference Designs Of Full-Bridge Converter

Key
AttractionsThe reference design supports testing various power control methods. It provides real-time voltage and current feedback. A load circuit enables users to test performance under different load conditions. This helps develop and refine converter systems.The 1kW full-bridge DC-DC converter reference design delivers efficient power with a stable output. It uses high-frequency switching, wide input range, and isolated communication, making it suitable for compact server power supply applications.The power module gives 12V and 600W with high efficiency. It features smart control, easy setup, digital communication, and a small size for telecom and industrial use.The reference design efficiently converts high-voltage power. It supports various voltage ranges, saves space, and is easy to adjust. Built-in control and safety features make it suitable for various power applications.The reference design provides efficient 400W power conversion with zero-voltage switching. It offers fast load response and low standby power. Built-in isolation ensures safety.

HighlightsNXP Semiconductors provides a full-bridge DC-DC switch-mode power supply (SMPS) reference design that shows power conversion using V series microcontrollers (MCUs). Operating as a transformer-isolated buck converter, the design comprises a full-bridge inverter, a transformer, a rectification stage, and an output filter. The low-voltage full-bridge DC-DC SMPS tower board works as a module in the tower system, allowing development and prototyping of power-control topologies. Developers can use two MCU/peripheral boards from the tower system to set control strategies such as peak current mode, average current mode, and voltage mode control. The design includes feedback circuits for operation, with voltage feedback provided through a resistor divider and current feedback achieved through a current transformer with a load resistor, both of which are adjusted for MCU sensing. A load circuit module is included to support testing and checking of power-control methods and software under different load conditions using a connected output resistor.The 1kW full-bridge DC-DC converter reference design by Toshiba offers a power conversion solution for server power supplies, using a phase-shifted full-bridge topology with synchronous rectification to deliver output and efficiency in a compact form. It operates with an input voltage range of -36V to -60V DC and provides a regulated 54V DC output, delivering up to 1kW of power with a total efficiency of 94.7% at full load. Components include power MOSFETs, four N-channel MOSFETs on the primary side rated at 80V with low on-resistance using U-MOSX-H process, and eight N-channel MOSFETs on the secondary side rated at 150V with 0.0154Ω on-resistance at 10V using U-MOSVIII-H technology, enabling high-frequency switching and improving efficiency and thermal performance. The design also features two high-speed photocouplers for isolated communication between primary and secondary sides, supporting data rates up to 20Mbps.The REF_600W_FBFB_XDPP1100 is an isolated DC-DC power module for telecom and industrial applications, delivering up to 96% efficiency in a DOSA-standard quarter-brick form factor. It uses a hard-switching full-bridge topology with secondary-side digital control, providing 12V at 600W output. The digital controller combines an analogue front end, pre-programmed peripherals, a fast control loop, and an embedded microcontroller to improve performance, reduce the bill of materials, and enable control features. The converter uses voltage mode control with built-in flux balancing and transformer flux walking protection, ensuring fast response to line and load changes for stable operation. Communication is via PMBus and I2C for digital system integration. Configurable through a graphical user interface, it allows firmware customisation, improving reliability and design flexibility. The integration of components enhances power density and reduces system costs. Pre-programmed control features enable fast time-to-market, while PMBus support allows adaptability to future needs.The STDES-6KWHVDCDC reference design from STMicroelectronics is a 6kW high-voltage DC-DC converter designed for EV charging infrastructure and other power applications in automotive, industrial, and renewable energy systems. It utilises a digital full-bridge LLC resonant converter architecture. It offers two hardware configurations: a dual-transformer setup for voltage ranges and a single-transformer version covering 200-1000V, both of which use the same PCB for easy modification. A frequency foldback control scheme enables efficiency under different load and voltage conditions. The design uses ST’s silicon carbide diodes for output rectification and MDmesh DK5 power MOSFETs for high-voltage switching. Control is handled by the microcontroller, which operates the power stage through PM8834MTR gate driver ICs and gate drive transformers, supported by a secondary-referenced auxiliary power supply. Safety features and testing support the design’s use as a tool for engineers working on high-voltage DC-DC power conversion systems.The TIDA-01407 is a 400W reference design from Texas Instruments for automotive power systems, using a phase-shifted full-bridge converter with a 36-60V DC input and a 12V output. A controller with programmable delays enables zero-voltage switching across varying conditions. Synchronous rectifiers on the output enable fast load response and a wide loop bandwidth, maintaining a stable 12V output even at no load, with standby power under 100mW. A transformer provides isolation to prevent the 48V input from reaching the output in the event of a failure. Half-bridge gate drivers on the primary side control the MOSFETs and support a boot voltage of up to 120V. The output is regulated from the primary side, avoiding the need for optocouplers and reducing board space. The design includes three parts: primary-side current sensing using a transformer for overcurrent protection and delay control; the main power stage with switching and power modes based on load; and synchronous rectification on the secondary side which reduces voltage drops and manages load shifts. It supports power delivery in traction inverters, control units, and DC-DC converters in mild hybrid vehicles.

ApplicationsThe reference design is suitable for simple power applications.The reference design is suitable for energy-conscious data centres and telecommunications applications.The reference design is suitable for isolated DC-DC brick modules, server motherboards, 48V computing, and data centre power supplies.The reference design is suitable for automotive, industrial, and renewable energy applications.The reference design is suitable for automotive systems, such as traction inverters and converters.