Non-Isolated PoE Powered Device Power Supply Maxim s non-isolated PoE powered device power supply features robust operation in adverse environments Many PoE applications are isolated to protect both people and systems from voltage and current transients. However, many applications do not require isolation such as LED lighting and other equipment generally out of range for human touch. In these cases, eliminating the isolation circuitry further reduces cost and power dissipation at the PoE point-of-load. To meet the increasing demands for non-isolated Power over Ethernet (PoE) power solutions, Maxim has developed innovative, non-isolated PoE powered device (PD) power solutions. These non-isolated PoE power solutions efficiently convert high-voltage PoE power into 5 V or 12 V outputs. Each design was tested for load and line regulation as well as efficiency and transient performance. As with all Maxim reference designs, the BOM, schematics, layout files, and Gerber files are all available. In addition, boards are available for purchase. These boards feature a module architecture with through-hole pins for immediate board placement and accelerated prototyping. MAXREFDES98 and MAXREFDES108 combines the PD controller and the step-down converter on a 14.0 mm (0.55 in.) x 55.9 mm (2.2 in.) board. The module accepts input voltages ranging from 36 V to 57 V, and provides an output voltage of 5 V with current capacity of 2.5 A or 12 V with current capacity of 1 A, respectively. Both products feature twelve through-hole pins spaced at a 2.54 mm pitch standard. This modular architecture allows MAXREFDES108 or MAXREFDES98 to be soldered into a PCB or inserted into the MAXREFDES98EV for evaluation. The reference designs contain all the control circuitry and electric components required for designing a 36 V to 57 V wide-input, 5 V / 2.5 A (12.5 W)(MAXREFDES98 ) or 12 V / 1 A (12 W)(MAXREFDES108 ) output, non-isolated, step-down converter power supply. The circuit consists of two function blocks: the PD controller and the step-down DC-DC converter. The PD controller section employs the MAX5969A. Following the PD controller is the step-down DC-DC converter. This circuit employs the MAX17505 (MAXREFDES108 ) or MAX17503 (MAXREFDES98 ), Maxims high-efficiency, synchronous, step-down DC-DC converter with internal compensation. Features 36 V to 57 V input voltage Robust operation in adverse environments Compact and flexible 12 W output capacity Minimal external components 3% output accuracy Applications Lighting Sensors IP cameras Non-isolated Ethernet equipment X-ON Electronics Largest Supplier of Electrical and Electronic Components Click to view similar products for Power Management IC Development Tools category: Click to view products by Maxim manufacturer: Other Similar products are found below : EVAL6482H-DISC EVAL-AD5522EBUZ EVAL-ADM1060EBZ EVAL-ADM1073MEBZ EVAL-ADM1166TQEBZ EVAL- ADM1168LQEBZ EVAL-ADM1171EBZ EVAL-ADM1276EBZ EVB-EN5319QI EVB-EN5365QI EVB-EN6347QI EVB-EP5348UI MIC23158YML EV MIC23451-AAAYFL EV MIC5281YMME EV 124352-HMC860LP3E ADM00513 ADM8611-EVALZ ADM8612- EVALZ ADM8613-EVALZ ADM8615-EVALZ ADP1046ADC1-EVALZ ADP1055-EVALZ ADP122-3.3-EVALZ ADP130-0.8-EVALZ ADP130-1.2-EVALZ ADP130-1.5-EVALZ ADP130-1.8-EVALZ ADP160UJZ-REDYKIT ADP166UJ-EVALZ ADP1712-3.3-EVALZ ADP1714-3.3-EVALZ ADP1715-3.3-EVALZ ADP1716-2.5-EVALZ ADP1740-1.5-EVALZ ADP1752-1.5-EVALZ ADP1754-1.5-EVALZ ADP1828LC-EVALZ ADP1870-0.3-EVALZ ADP1871-0.6-EVALZ ADP1873-0.6-EVALZ ADP1874-0.3-EVALZ ADP1876-EVALZ ADP1879-1.0-EVALZ ADP1882-1.0-EVALZ ADP1883-0.6-EVALZ ADP197CB-EVALZ ADP199CB-EVALZ ADP2102-1.25-EVALZ ADP2102-1.2-EVALZ