TDF8591TH/N1TJ

Overview

The TDF8591TH is a high-efficiency Class-D audio power amplifier designed for automotive applications. It delivers 2 × 100 W into 4 Ω in Single-Ended (SE) mode or 1 × 310 W into 4 Ω in Bridge-Tied Load (BTL) mode. The device operates on a supply voltage range of ±14 V to ±29 V and features low quiescent current consumption. It includes thermal foldback, overtemperature protection, and short-circuit proof outputs.

Feature Summary

• Zero dead time switching minimizes distortion and improves efficiency.
• Advanced output current protection prevents damage during short circuits.
• No DC offset induced pop noise at mode transitions ensures silent operation.
• High BTL output power capability with fixed gain settings.

Applications

• Car audio systems
• Mono Bridge-Tied Load (BTL) amplifier configurations
• Dual Single-Ended (SE) amplifier configurations

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package and tape/reel specifications. Confirm that the component meets AEC-Q100 qualification requirements for your automotive application. Check for any end-of-life notices or alternative part recommendations from NXP Semiconductors before finalizing procurement plans.

Selection Notes

Select this amplifier for applications requiring high power density and efficiency in automotive environments. Ensure the design accommodates the required supply voltage range of ±14 V to ±29 V. Consider the thermal management needs based on the expected load impedance and operating temperature. Verify compatibility with differential input stages and external clock synchronization if multiple units are used.

Part Context

The TDF8591TH belongs to NXP's family of high-efficiency Class-D audio amplifiers. It utilizes SOI BCDMOS technology for low power dissipation. The device is housed in an HSOP24 power package with a small internal heat sink, reducing the need for external heatsinks in many applications.

Replacement Considerations

Consult NXP Semiconductors' official obsolescence notices and replacement guides for verified substitute part numbers. Do not assume cross-compatibility with other series without verifying pinout and electrical specifications.

FAQ

How is the oscillator frequency set?

The oscillator frequency is set by an external resistor connected between the OSC pin and VSSA. An optimum setting is between 300 kHz and 350 kHz, typically achieved with a 30 kΩ resistor.

What protections are included in the TDF8591TH?

The device includes Thermal Foldback, Overtemperature Protection, OverCurrent Protection, Window Protection, UnderVoltage Protection, OverVoltage Protection, and Unbalance Protection.