Diodes Incorporated PAM8014AZR

Overview

PAM8014AZR from Diodes Incorporated is a 3.2W mono Class-D audio amplifier in U-WLB1313-9 package, featuring filter-less BTL output, differential input, 93% efficiency at 2W/8Ω, PSRR of −75dB, and shutdown current <1μA. It delivers low-THD+N (0.14% at 1W/4Ω), operates from 2.5V–5.5V, and integrates short-circuit and thermal protection for portable audio systems.

For engineers reviewing the PAM8014AZR datasheet, PAM8014AZR pinout, PAM8014AZR application, or PAM8014AZR equivalent, key selection criteria include its ultra-low EMI (−20dB vs FCC Class-B @300MHz), 31kΩ input impedance, 8V/V closed-loop gain, 250kHz switching frequency, and space-constrained PCB integration with only three external capacitors required.

Technical Context

The PAM8014AZR implements a PWM-based Class-D architecture with internal oscillator, bias, and reference generation, supporting BTL output drive via complementary high-side PMOS and low-side NMOS outputs (R_DS(ON) = 200mΩ each). Its differential input stage rejects common-mode noise, while UVLO (2.0V trip) and OTP (+150°C with +40°C hysteresis) ensure robust operation under supply and thermal stress.

It uses a fixed 18dB gain (8V/V) set by internal 31kΩ R_IN and 124kΩ R_F, enabling flat frequency response down to 150Hz with 10nF input coupling. The filter-less design eliminates output LC networks, relying on speaker inductance and integrated ferrite-bead EMI suppression (200pF + bead per output) to meet EMC requirements.

Key Specifications

Pinout & Package

Package: U-WLB1313-9 - 1.28mm × 1.28mm × 0.55mm wafer-level chip-scale package with solder balls, moisture sensitivity level 1, suitable for fine-pitch SMT assembly on dense portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPA2013D1RTJR and MAX9718ETA+, the PAM8014AZR provides superior EMI margin (−20dB vs FCC), higher efficiency at full load, and true differential input-making it optimal for space-constrained, RF-sensitive portable designs where audio fidelity and battery runtime are co-prioritized.

Availability

PAM8014AZR is available at Aetrix Electronics and suitable for smartphones, MP3 players, VOIP handsets, and digital photo frames requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for PAM8014AZR 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, industrial, and computing markets.

The PAM8014 belongs to Diodes' Class-D Audio Amplifier product line, engineered specifically for ultra-compact, battery-powered portable devices demanding high PSRR, low EMI, and minimal external component count.

FAQ

What is the minimum recommended input capacitor value for flat bass response down to 150Hz?

A 10nF ceramic capacitor is recommended for C_IN when R_IN = 31kΩ to achieve flat response down to 150Hz. This value accounts for tolerance and leakage effects; low-leakage X7R or C0G ceramics are preferred to avoid DC offset that reduces headroom in high-gain configurations.

How does the PAM8014AZR suppress pop-and-click noise during power-up?

The device internally mutes the amplifier and ramps the reference voltage to VDD/2 before enabling output stages. This controlled startup sequence eliminates turn-on transients. For optimal turn-off performance, the EN pin must be pulled low before removing VDD to prevent uncontrolled discharge-induced pops.

Can the PAM8014AZR drive an 8Ω speaker at full rated power?

Yes-it delivers 1.8W at 10% THD+N into 8Ω at 5V supply, and 1.4W at 1% THD+N. While its 3.2W rating is specified for 4Ω, the 8Ω capability supports higher-voltage, lower-current operation ideal for compact speakers with elevated impedance and reduced thermal stress.

What is the purpose of separating VDD and PVDD pins?

VDD powers the analog input, bias, and control circuitry, while PVDD supplies only the H-bridge output stage. This separation prevents high di/dt switching currents from modulating the analog reference and input stage, directly improving PSRR and THD+N performance without requiring additional supply filtering.