PM8804TR

Overview

The PM8804TR is a PWM peak current mode controller designed for PoE and telecom systems. It features an input operating voltage range of 10 V to 75 V with an internal high-voltage startup regulator providing 20 mA capability. The device supports programmable fixed frequencies up to 1 MHz and includes dual low-side complementary gate drivers with 1 A peak current capability. Key parameters include a maximum duty cycle of 80%, programmable dead time from 10 to 200 ns, and a soft-start time. Operating current consumption is typically 1.5 mA. It operates within a temperature range of -40°C to +85°C (up to 125°C per some sources) and is housed in a 16-VFQFPN package.

Feature Summary

• Integrates dual low-side complementary gate drivers with programmable dead time for synchronous rectification applications
• Features embedded protections including severe overcurrent latch, delayed overload restart, feedback disconnection detection, and thermal shutdown
• Supports high-efficiency topologies such as flyback, forward, active clamp, and synchronous rectification configurations

Applications

• PoE-powered devices compliant with IEEE 802.3af/at/bt standards
• Telecom power supply systems
• Wireless access point power conversion
• Retail POS and logistics equipment power supplies

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm the specific suffix matches the required tape-and-reel packaging configuration. Check for recent Product Change Notifications regarding manufacturing site updates or material composition changes. Ensure ESD handling protocols are followed due to moisture sensitivity classification. Validate that the procurement source provides valid traceability documentation for quality assurance compliance.

Selection Notes

Select this controller for designs requiring integrated gate driving and peak current mode control in compact footprints. Consider the 1 A driver capability when sizing external MOSFETs for the target power level. Evaluate the programmable frequency range against electromagnetic interference requirements. Verify that the 80% maximum duty cycle aligns with the transformer turns ratio and input voltage range. Assess the need for GATE2 disable functionality to optimize light-load efficiency.

Part Context

The PM8804TR belongs to the PM8804 series of power management ICs from STMicroelectronics. It is specifically engineered as a DC-DC switching controller for isolated converter topologies. The component is often utilized in system-level solutions like the STEVAL-POE006V1 reference design, where it pairs with PoE-PD interface controllers to deliver efficient power conversion for network infrastructure.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. DigiKey indicates this specific part number may be discontinued or limited in availability. Designers should consult official STMicroelectronics resources for potential pin-compatible or functionally equivalent alternatives within the same product family.