Diodes Incorporated PAM8610TR

Overview

PAM8610TR from Diodes Incorporated is a 10W per channel stereo Class-D audio power amplifier with integrated DC volume control, differential inputs, and shutdown/mute/fade functions. It delivers 10W into 8Ω at 13V with 0.1% THD+N, operates from 7–15V supply, and achieves >90% efficiency. Used in flat-panel displays and multimedia speaker systems where compact size, low EMI, and pop-noise suppression are critical.

For engineers reviewing the PAM8610TR datasheet, PAM8610TR pinout, PAM8610TR application, or PAM8610TR equivalent, key selection criteria include its 40-pin QFN package thermal performance (θJA = 18.1°C/W), 32-step DC volume range (−75 dB to +32 dB), dual-channel bootstrap architecture, and integrated 2.5V bias generator for input common-mode stability.

Technical Context

The PAM8610TR implements a dual-channel, full-H-bridge Class-D topology using NMOS-only output stages requiring external bootstrap capacitors (pins 15/16/35/36) and internal VCLAMP regulators (pins 21/30). Its oscillator frequency (250 kHz typical) is set by external ROSC (120 kΩ) and COSC (220 pF), enabling EMI optimization.

It integrates analog functions including a 5V AVDD regulator for preamp/volume circuitry, a 2.5V V2P5 reference for input biasing, and independent left/right power domains (PVCCL/PGNDL and PVCCR/PGNDR) to minimize crosstalk (−80 dB). Protection includes latched short-circuit detection and non-latched thermal shutdown at 150°C with 40°C hysteresis.

Key Specifications

Pinout & Package

The PAM8610TR is housed in a thermally enhanced 40-pin QFN package (6 mm × 6 mm, 0.75 mm height) with exposed thermal pad requiring PCB vias and copper pour for junction-to-ambient thermal resistance of 18.1°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar stereo Class-D audio amplifier applications.

Compared with PAM8006A and TAS5707PAP, the PAM8610TR uniquely balances 10W/channel analog Class-D performance, minimal external components (no DAC or LDO needed), and thermal robustness in a 36 mm² QFN - making it optimal for mid-tier consumer audio where analog simplicity and reliability are prioritized over programmability.

Availability

PAM8610TR is available at Aetrix Electronics and suitable for flat-panel displays, multimedia speaker systems, and portable music instruments requiring stable component supply, RoHS-compliant packaging, and production-ready thermal design support.

Supply support for PAM8610TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and audio solutions for consumer, computing, and industrial markets.

The PAM8610TR belongs to Diodes' PAM Class-D audio amplifier product line, engineered specifically for space-constrained, cost-sensitive consumer audio applications demanding high fidelity, low EMI, and simplified bill-of-materials.

FAQ

What is the minimum recommended capacitor value for the V2P5 pin?

A minimum 0.47 μF ceramic capacitor is required on the V2P5 pin to ensure stable startup and optimal common-mode biasing of the differential input stage. This value controls the rate at which the internal 2.5V reference reaches 75% of its final voltage, triggering Class-D output enablement. Larger values (e.g., 1 μF) further reduce high-frequency noise but do not affect functional timing.

How does the FADE pin affect startup behavior?

When FADE is held low, the PAM8610TR performs smooth volume ramping during power-up or recovery from shutdown - transitioning from −75 dB mute to the target gain set by the VOLUME pin voltage over ~100 ms. When FADE is high, the transition occurs in under 1 ms, enabling rapid audio enablement for responsive user interfaces.

Can the PAM8610TR drive 4Ω speakers reliably?

Yes - the PAM8610TR delivers up to 15W per channel into 4Ω loads at 13V (THD+N = 10%), confirmed in datasheet Table 1. However, thermal design must accommodate higher power dissipation: at 15W/4Ω, junction temperature rises significantly, requiring enhanced PCB copper area, vias, and ambient temperature derating per the thermal calculation in Section 9 of DS36447.

Why are separate PVCCL and PVCCR pins provided?

Separate left and right channel power supply pins (PVCCL/PVCCR) isolate high-current switching paths, minimizing magnetic coupling and supply rail crosstalk. This architecture achieves −80 dB measured crosstalk and improves PSRR by preventing one channel's switching noise from modulating the other channel's supply voltage - critical for stereo imaging fidelity.