RT9108NZCP

Overview

The RT9108NZCP is a stereo Class-D audio power amplifier manufactured by Richtek USA Inc. It operates within an input supply range of 8V to 25.5V and delivers up to 15W per channel into an 8Ω load at 16V with 10% THD+N. The device features 88% efficiency, eliminating the need for external heat sinks during music playback. It utilizes a three-level modulation scheme allowing operation without classic LC reconstruction filters when driving inductive loads. The amplifier includes adjustable power limiting, four selectable gain settings via GAIN0/GAIN1 pins, and robust protection against short circuits and thermal overload.

Feature Summary

• High-efficiency Class-D architecture eliminates the need for external heat sinks during typical music playback.
• Three-level modulation scheme enables operation without classic LC reconstruction filters for inductive loads.
• Integrated adjustable power limiter protects connected speakers from excessive current draw.
• Robust protection mechanisms include short circuit protection with auto-recovery options and thermal shutdown.

Applications

• LCD-TV
• Monitors
• DVD Players

Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm RoHS compliance status and check for specific packaging variants if required. Ensure the supplier provides valid traceability documentation. Cross-reference the full part number including suffixes to match exact package and lead plating specifications before finalizing procurement orders.

Selection Notes

Select this amplifier for applications requiring high efficiency and minimal thermal management solutions. Consider the exposed pad TSSOP-28 package for optimal thermal dissipation on PCB layouts. Evaluate the gain configuration requirements using the GAIN0 and GAIN1 pins to match source impedance. Ensure the power supply voltage falls within the 8V to 25.5V operating range for proper functionality.

Part Context

The RT9108N series consists of 15W stereo Class-D audio amplifiers designed for driving bridge-tied load speakers. The RT9108NZCP specifically denotes the version packaged in a 28-TSSOP with an exposed pad and compliant with ecological element standards. This family targets consumer electronics where space constraints and thermal performance are critical design factors.

Replacement Considerations

TPA3101D2PHPR is listed as a similar replacement option.

FAQ

How does the RT9108NZCP handle short circuit faults?

The amplifier switches outputs to a Hi-Z state upon detecting a short circuit. The FAULT pin indicates the error. Connecting the FAULT pin directly to the SD pin enables automatic recovery from the latch.

What is the function of the PLIMIT pin?

The PLIMIT pin allows users to program the output power limit by setting a voltage level. This creates a virtual lower voltage rail to protect the speaker load from excessive current.

Does the RT9108NZCP require an LC filter?

It uses a three-level modulation scheme that allows operation without a classic LC reconstruction filter when driving inductive loads, though an LC filter can be used for additional noise reduction.