Diodes Incorporated PAM8008DR

Overview

PAM8008DR from Diodes Incorporated is a 3W stereo Class-D audio amplifier in SOP-16L package, featuring integrated 64-step DC volume control (–80 dB to +20 dB), power limit function, anti-saturation protection, and 6 dB noise reduction circuitry. It delivers 2.4 W at 1% THD+N into 4 Ω with 5 V supply and supports filterless operation for compact portable audio systems.

For engineers reviewing the PAM8008DR datasheet, PAM8008DR pinout, PAM8008DR application, or PAM8008DR equivalent, key selection criteria include its dual-channel Class-D architecture, SOP-16L thermal performance (θ_JA = 110 °C/W), low-noise floor (60 µV A-weighted), and configurable PL/anti-saturation mode via Pin 4.

Technical Context

The PAM8008DR implements a dual-channel, fully differential Class-D topology with internal oscillator (200–300 kHz) and independent left/right output stages. Its gain control is voltage-driven via the VOLUME pin, enabling precise 64-step DC volume adjustment without external DACs or digital interfaces.

Power limit and anti-saturation functions are managed by Pin 4 (PL) logic level: floating or GND enables power limiting (2.5 W, THD+N < 10%), while high-level input selects anti-saturation mode (2.3 W, THD+N < 1% at V_DD = 5 V). Mute and shutdown are controlled separately via active-high MUTE and active-low SD pins.

Key Specifications

Pinout & Package

The PAM8008DR is housed in a 16-pin SOP (Small Outline Package) with exposed thermal pad, offering θ_JA = 110 °C/W and θ_JC = 23 °C/W for effective heat dissipation in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPA2013D1RTJR and MAX9718ETA+, the PAM8008DR uniquely integrates DC volume, power limit, anti-saturation, and noise reduction in a single SOP-16L package - reducing system-level complexity and component count without sacrificing audio fidelity or protection robustness.

Availability

PAM8008DR is available at Aetrix Electronics and suitable for LCD monitors, portable speakers, and notebook computers requiring stable component supply, consistent thermal performance, and long-term production continuity.

Supply support for PAM8008DR 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 ICs, specializing in high-efficiency power management, signal integrity, and audio solutions for consumer, computing, and industrial markets.

The PAM8008DR belongs to Diodes' PAM family of Class-D audio amplifiers, designed specifically for cost-sensitive, space-constrained portable audio applications requiring high efficiency, low noise, and integrated protection without external components.

FAQ

What is the recommended bypass capacitor value for the BYPASS (Pin 2) terminal?

A ceramic capacitor of 0.47 µF to 1.0 µF is specified for Pin 2 (BYPASS) to stabilize the internal analog reference, reduce startup pop noise, and improve THD+N performance. Placement must be within 2 mm of the pin with short, low-inductance traces; using 1.0 µF yields optimal noise suppression across audio band and switching frequencies.

How does the PL (Pin 4) pin configure power limit versus anti-saturation modes?

Pin 4 (PL) sets mode by voltage level: ≤0.2 V (GND or floating) enables power limit (2.5 W, THD+N < 10%); ≥3.8 V selects mode based on V_DD (V_DD ≤ 5 V → anti-saturation; V_DD > 5 V → power limit); 0.8–2.5 V disables both functions. Mode selection is confirmed in Table 3 of the datasheet and requires no external logic.

Can the PAM8008DR drive 8 Ω speakers, and what is the output power at that impedance?

Yes - at 5 V supply and 1% THD+N, the PAM8008DR delivers 1.4 W into 8 Ω (per channel), as specified in Electrical Characteristics. Efficiency drops to 87% at this condition, and thermal rise remains within safe limits due to θ_JA = 110 °C/W. For higher power into 8 Ω, parallel BTL configuration is not supported; use 4 Ω loads for full 2.4 W capability.

Does the PAM8008DR require external LC filtering for EMI compliance?

No - it supports filterless operation with proper PCB layout and ferrite bead placement (e.g., MH2012HM221-T) on each output trace. The datasheet confirms EMI reduction up to 1 MHz+ with this approach. LC filters are only required if ferrite beads alone fail radiated emissions testing; adding 22 µH inductors + 1 µF capacitors per channel meets strict Class B standards.