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PAM8905 (NRND)

NRND = Not Recommended for New Design

1.9W Mono Class-G with Integrated Boost Converter and Battery Tracking AGC

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Description

The PAM8905 is a high efficiency Class-D audio power amplifier with an integrated boost converter. It drives up to 1.9W (1% THD+N) into an 8Ω speaker. With 85% typical efficiency, the PAM8905 helps extend battery life when playing audio.
The built-in boost converter generates the voltage rail for the output stage. This provides a louder audio output than a stand-alone amplifier connected directly to the battery. It also maintains a consistent loudness, regardless of battery voltage.
The PAM8905 features battery tracking AGC function which adjusts the Class-D gain to limit battery current at lower battery voltage.
PAM8905 features DC input protection and all outputs are fully protected against output-to-output shorts. The PAM8905 is available in tiny WCSP12 (1.5mm x 2.0mm) packages.

Feature(s)

Built-In Battery Tracking Automatic Gain Control (AGC)
High Efficiency Integrated Boost Converter Over 85%
1.9W into an 8Ω Load from a 3.6V Supply
Operates from 2.8V to 5.2V
Efficient Class-D Prolongs Battery Life
Minimized ON/OFF Pop Noise
Superior Low Noise
High PSRR
DC Input Protection
Auto-Recovery Short-Circuit Protection
Thermal Shutdown
Available in U-WLB1520-12 Package

Application(s)

Cell Phones
PDA
GPS
Portable Electronics
Speakers

Specifications & Technical Documents

Product Parameters

Anti-Sat	N/A
BTL	N/A
Class-D or AB	D
Efficiency (%)	85
Gain Max	20
Gain Min	N/A
Headphone Out	N/A
I_{Q (mA)}	4
Maximum V_DD (V)	5.2
Minimum V_DD (V)	2.8
Mono or Stereo	N/A
Power Limit	N/A
Power/CH (W) @ THD=1%	3.2
Power/CH (W) @ THD=10%	4
PSRR	-70
AEC Qualified	No
SE	N/A
SNR	95
Special Features	N/A
Volume/ Gain	AGC

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products