PAM8615RHR

Overview

The PAM8615RHR is a Class-D audio power amplifier manufactured by Diodes Incorporated, housed in a TSSOP-24EP surface-mount package. It delivers up to 32W per channel into an 8Ω bridge-tied load (BTL) or 16W per channel into a 4Ω single-ended (SE) load from a 24V supply. The device operates on a single supply voltage ranging from 8V to 30V and achieves efficiency exceeding 90%. Key electrical characteristics include a quiescent current of 25mA typical at 24V, a thermal trip point of +160°C, and integrated DC volume control spanning -40dB to +36dB.

Feature Summary

• Supports multiple output configurations including stereo single-ended and mono bridge-tied loads.
• Features integrated DC volume control with a gain range from -40dB to +36dB.
• Includes thermal protection and short-circuit protection for output safety.
• Provides clock synchronization capability via SYNC terminal for multi-device systems.

Applications

• Televisions
• Home sound systems

Procurement Notes

Verify the component datasheet revision and ordering suffix to ensure compatibility with specific packaging requirements. Confirm that the application design accounts for the recommended PCB copper thickness and via hole placement to manage heat dissipation effectively. Ensure power supply decoupling meets the specified capacitor values to maintain signal integrity and prevent oscillation during operation.

Selection Notes

Select this amplifier for applications requiring high efficiency and flexible output configurations without external heatsinks. Consider the integrated DC volume control if analog gain adjustment is preferred over digital methods. Evaluate the thermal resistance of the PCB layout to ensure reliable operation under maximum power conditions. Verify that the operating voltage range aligns with the system's available power supply rails.

Part Context

The PAM8615RHR belongs to the PAM8615 series of efficient Class-D audio amplifiers designed for driving stereo speakers in single-ended or mono speakers in bridge-tied configurations. It is intended for use in consumer electronics where space-saving surface-mount packages and high performance are required. The device is not recommended for new designs; customers should consider alternative components for future projects.

Replacement Considerations

The datasheet explicitly states that the PAM8615 is not recommended for new designs and recommends using the PAM8124 as a replacement.

FAQ

How is the switching frequency of the PAM8615 determined?

The switching frequency is determined by the value of the external resistor connected to the ROSC pin. A recommended value of 100kΩ results in a frequency of approximately 323kHz.

What is the function of the VCLAMP terminal?

The VCLAMP terminal provides an internally generated voltage supply for the bootstrap circuitry. A 1μF capacitor rated for at least 25V must be connected from this terminal to ground to ensure proper operation.