Content last revised on March 13, 2026
PAF600F24-28T TDK-Lambda 600W Full-Brick DC-DC Power Module
How can engineers maintain a stable 28V DC rail in high-power industrial systems when the primary 24V battery or bus voltage fluctuates between 18V and 36V? The PAF600F24-28T, part of TDK-Lambda’s PAF series, addresses this challenge by providing a regulated 602W output in a standardized Full Brick footprint, specifically developed for high-current applications where thermal efficiency is the primary constraint. This module eliminates the need for complex discrete power stages by integrating comprehensive protection and sensing features into a single high-density package.
The PAF600F24-28T serves as a high-efficiency power regulation solution for industrial 24V bus architectures requiring precision 28V delivery. Key specifications include an 18 - 36V DC Input Range, 28V DC Nominal Output, and a 21.5A Output Current. Engineers can achieve superior reliability through the module's Baseplate Cooling design, which manages heat dissipation effectively in enclosed environments. What is the primary benefit of its wide-range trimming capability? It allows for precise voltage adjustment between 16.8V and 33.6V to compensate for distribution losses. For 24V systems prioritizing power density and thermal margins, this 600W module is the optimal choice.
Frequently Asked Questions
Addressing Common Engineering Challenges in High-Power Conversion
How does the baseplate cooling mechanism impact the overall system thermal design compared to open-frame converters?
Unlike open-frame units that rely on airflow over individual components, the PAF600F24-28T utilizes a Baseplate design where all heat-generating semiconductors are thermally coupled to a single aluminum surface. This allows engineers to use the system chassis or a dedicated heatsink as the primary thermal reservoir. By maintaining the baseplate temperature below 100°C, the module ensures long-term reliability without requiring high-velocity fans directly over the PCB.
What are the implications of the remote sense and trim functions for long-distance power distribution?
The PAF600F24-28T includes a Remote Sense feature that monitors the voltage at the load rather than the module pins, automatically compensating for voltage drops across cables. Additionally, the Trim function allows for an adjustment range of 60% to 120% of the nominal output. This is critical for 28V systems where peripheral devices might require slightly higher voltages to account for connector resistance or specific component requirements.
Key Parameter Overview
Decoding Technical Specifications for System Integration
| Parameter | Official Specification | Engineering Value |
| Input Voltage Range | 18 - 36V DC | Compatible with standard 24V battery systems |
| Nominal Output Voltage | 28V DC | Ideal for RF power and industrial DC motors |
| Maximum Output Current | 21.5A | Supports high-torque startup loads |
| Maximum Output Power | 602W | High density in a Full-Brick form factor |
| Efficiency (Typical) | 88% - 91% | Minimizes waste heat and reduces cooling costs |
| Trim Range | 16.8V - 33.6V | Versatile regulation for varied load requirements |
| Isolation Voltage | 1.5kV AC | Ensures safety and signal integrity |
Download the PAF600F24-28T datasheet for detailed specifications and performance curves.
Technical Deep Dive
Maximizing Reliability through Thermal Management and Parallel Operation
The PAF600F24-28T is built on a Full Brick platform (116.8 x 12.7 x 61mm), utilizing advanced power packaging to achieve high efficiency. A critical feature of this module is its Parallel Operation capability. When system power requirements exceed 600W, multiple units can be connected in parallel using the PC (Parallel Control) terminal. This ensures balanced current sharing among modules, preventing any single unit from entering an over-stress condition. Think of this current-sharing mechanism as a multi-engine aircraft; even if load demands fluctuate, the PC terminal acts as a synchronized throttle, ensuring every module contributes equally to the total power output.
In terms of thermal design, the PAF600F24-28T employs a highly conductive internal potting compound that transfers heat from internal components to the Aluminum Baseplate. To interpret the engineering significance: the module is designed to operate as a thermal "pump," where the low thermal resistance between the junction and baseplate allows for high-power density without the typical localized "hot spots" found in traditional discrete converter designs. For designers of high-efficiency power systems, this predictable thermal behavior simplifies the selection of heatsinks and cooling fans, directly impacting the Total Cost of Ownership (TCO).
Application Scenarios & Value
Achieving System-Level Benefits in Industrial Power Architectures
The PAF600F24-28T is frequently utilized in Industrial Automation and Telecommunications infrastructure. A high-fidelity engineering scenario involves its use in automated warehouse robotics. These systems often run on a 24V lead-acid or lithium battery bus that drops voltage significantly during high-current acceleration phases. By employing the PAF600F24-28T, the robot's control electronics and sensors receive a stable, regulated 28V supply regardless of battery state. The 21.5A current capability ensures that even during peak torque demands from auxiliary motor drives, the logic supply remains uncompromised, preventing system resets or data corruption.
For systems requiring high-power switching downstream of the DC-DC stage, such as in heavy machinery motor control, the related CM600DX-24T offers a high-current IGBT solution that pairs effectively with the stable output provided by the PAF series. Furthermore, the inclusion of Remote On/Off and Overvoltage Protection (OVP) allows the PAF600F24-28T to integrate seamlessly into PLC-controlled environments, providing a "smart" power node that can be remotely managed to enhance system safety. By leveraging these features, engineers can adhere to strict IEC 61800-3 standards for power drive systems while maintaining a compact physical footprint.
As industrial systems move toward greater integration and higher efficiency, selecting a power module that balances raw performance with robust thermal characteristics is essential. The PAF600F24-28T represents a mature, field-proven choice for 24V architectures, offering the precise regulation and protective features necessary for modern automation. For detailed integration guidance or thermal simulation data, consulting the technical resources at Infineon or TDK-Lambda provides the foundational support needed for successful deployment in complex power grids.