Overview
The 6.5 mm thin EPC9153 power module is a 250W high-efficiency, high-performance synchronous buck converter with 60 V maximum input voltage, 12.5 A maximum output current, and programmable 12-20 V (default set to 20 V) regulated output voltage. Developed in collaboration with Efficient Power Conversion Corporation (EPC), it features the high-performance dsPIC33CK Digital Signal Controller (DSC), EPC2218 and EPC2038 eGaN® FETs.
While other reference designs such as EPC9148 have been optimized for highest power densities, this conventional non-isolated, hard-switching step-down converter is optimized for maximum output power capability at the highest efficiency (> 98.2%) with a maximum temperature rise of +40 K above ambient with passive cooling. With a total power density of only 112 W/in³, this converter is capable of providing up to 200% (500W / 25A max.) of its nominal output power for a limited amount of time at a peak efficiency of >98.2%. For test purposes, the over-power time limits have been set to 10ms for 150% and 1ms for 200% load. Each boost-mode time limit can be reconfigured and tailored to known test conditions by the user. On the other side of the load spectrum, the power consumption under no-load conditions has been minimized by applying a hysteretic standby mode, in which the converter still provides a regulated output voltage at only 280 mW total power consumption, supporting fast recovery of fixed frequency operation within 100 µsec.
The digital control loop in this design enables the non-linear switch-over between control modes across load conditions and self-protecting over-power boost modes, expanding the support of extreme load dynamics of high-performance loads like CPUs and FPGAs. The 250ps resolution fine-edge placement of the PWM module enables efficiency enhancements through dead-time optimization.
For more information on hardware related documentation, design files and purchasing information, please visit EPC’s product website:
EPC9153 – 250 W High Efficiency, Thin Power Module
o Input Voltage: 44 … 60V DC
o Output Voltage: 12 … 20V DC (programmable)
o Output Current: 12.5A (avg.) / 25A (max.)
o High efficiency: 98.2% @ 20V/12.5A output
o Low profile: 6.5 mm component height
o Temperature rise: < 40 °C @ 20 Vout with 12.5 A output
o Constant switching frequency: 400 kHz
o Re-programmable
o 150% over current for 10ms
o 200% over current for 1ms
o Fault protection:
Input undervoltage
Input overvoltage
Output over voltage
Short circuit
Over current
Applications:
• High Performance Computing – computers, displays, thin consumer electronics
Documentation
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| EPC9153 250W 48V Thin Profile Synchronous Buck Converter Firmware | Software | Link |
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EPC is the leader in enhancement-mode gallium nitride (eGaN®) based power management. eGaN FETs and integrated circuits provide performance many times greater than the best silicon power MOSFETs in applications such as DC-DC converters, remote sensing technology (lidar), motor drives for eMobility, robotics, and drones, and low-cost satellites.
eGaN® FETs and integrated circuits provide the fast switching, small size and low cost that can meet the stringent power density requirements of these leading-edge applications with low component count and solution cost |