TPS23755RJJR

Overview

The TPS23755RJJR is an IEEE 802.3at Powered Device (PD) controller from Texas Instruments, designed for high-efficiency PoE applications. It integrates a 150V switch power FET and a current-mode DC-DC controller optimized for flyback topologies. The device supports Type 1 PD operation with a rated output power of 13W. Key electrical parameters include a maximum operating voltage of 57V, a minimum input voltage of 9.3V, and a typical inrush limit of 140mA. It features a 6mm x 4mm VSON package with a thermal pad, operates within a temperature range of -40°C to +125°C, and utilizes primary side regulation to eliminate the need for optocouplers.

Feature Summary

• Integrates a 150V switch power FET and a current-mode DC-DC controller optimized for flyback topologies.
• Supports primary side regulation (PSR) to control output voltage without external optocouplers or parallel regulators.
• Includes advanced startup capabilities allowing for minimal bias capacitor usage while simplifying converter design.
• Features programmable switching frequency and slew rate control to minimize EMI filter size and cost.

Applications

• Size-constrained PoE-powered devices requiring high integration
• Flyback converters utilizing secondary side diode rectifiers
• Non-isolated applications supporting buck topology

Procurement Notes

Verify the specific suffix RJJR corresponds to the VSON-23 package and reel tape configuration. Confirm RoHS compliance status through official manufacturer documentation. Ensure the component meets humidity sensitivity level requirements for your assembly process. Cross-reference the datasheet revision date to validate parameter accuracy against your design specifications.

Selection Notes

Select this component when designing Type 1 PoE systems requiring integrated power switching and DC-DC control. It is suitable for applications prioritizing reduced bill of materials by eliminating optocouplers. Consider its thermal performance and package size constraints relative to your PCB layout. Verify compatibility with your required output voltage levels and load regulation specifications.

Part Context

This part belongs to the TPS2375x series of PoE controllers from Texas Instruments. It is distinct from the TPS2375PWR-1, which supports the older 802.3af standard. The TPS23755 specifically targets 802.3at Type 1 implementations. It shares family characteristics with other members like the TPS23753 and TPS23756 but offers unique integration levels and package options tailored for compact designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Texas Instruments documentation for direct replacements or pin-compatible alternatives within the same product family.