RPX-2.5-EVM-1 Recom Power

Evaluation platform for RPX-2.5 buck regulator Features module Evaluation Module Thermal design considerations included EMI Class B filter Evaluation Easy evaluation of output voltage selection, Module control and sensing functions RPX-2.5-EVM-1 Description The RPX-2.5-EVM-1 generates a constant output voltage selectable from 1.8V, 3.3V or 5V from a DC input in the range of 4.5 28V (6V 28V for the 5V output). It has a maximum continuous output current of 2.5 A. All the functions of the RPX-2.5 such as output voltage selection, control, and output sense can be readily evaluated. Also the behavior in overload or over-temperature can be evaluated easily before it is designed in. The evaluation board also contains the filter components to meet EMC Class B levels. Alternate component positions are included to allow experimentation to optimize the EMC performance depending on operating conditions and budget. Selection Guide Part Input Output Output Number Voltage Range Voltage Current VDC VDC A RPX-2.5-EVM-1 4.5 - 28 1.8, 3.3 2.5 6 - 28 5 2.5 Quick Start Guide 1. Connect P1 to power supply (observe correct polarity ) 2. Connect P2 to the load (no load operation is allowed) 3. The evaluation module is preset to 5Vout. The output voltage can be selected with values of 1.8V and 3.3V, by desoldering the 0 Ohm resistor near 5V and adding a 0 Ohm resistor to the respective places as seen in the board silkscreen. 4. The sense pin is connected to the RPX output pin, so the preset voltage is very accurate at the output of the RPX. To compensate for any losses of the filter, remove the resistor at R1, and solder a zero ohm resistor at R11. 5. CTRL/UVLO The device is preset as normally on. It can be disabled by pulling the CTRL pin to GND. UVLO is preset to around 4.1V. Fit R9/R10 to set the UVLO voltage. Caution: ESD sensitive. Always follow ESD preventative procedures when handling the product www.recom-power.com REV.: 0/2019 P-1RPX-2.5-EVM-1 Evaluation Module Specifications (measured Ta= 25C, full load and after warm-up unless otherwise stated) Component Placement RPX-2.5-EVM-1 FOR EVALUATION ONLY www.recom-power.com/eval-ref-boards 1 8 P1 GND GND P2 U1 1 1 L1 L4 2 2 L2 L5 R2 VIN VOUT C5 L3 L6 2 4.5V to 28V 2.5A max. 7 6 VOUT SELECT SENSE 3 4 5 R9 R10 VIN CTRL GND Connector Description P2 P1 Pin Name Description Pin Name Description 1 GND Common GND 1 GND Common GND 2 VIN Positive Input Voltage (observe correct polarity ) 2 VOUT Positive Output Voltage Pads direct Connection Pin Name Description 1 GND Common GND 2 VIN Positive Input Voltage 3 VIN Positive Input Voltage (after input filter) 4 CTRL CTRL Pin (leave open if not used) 5 GND Common GND 6 SENSE Output Voltage Sense Pin (leave open if not used) 7 VOUT Positive Output Voltage 8 GND Common GND www.recom-power.com REV.: 0/2019 P-2 C1 C2 C3 C4 5V R5 R4 3.3V R3 1.8V C6 R1 C7 C8 C9 R11