PAM8965
12W STEREO CLASS-D AUDIO AMPLIFIER
WITH SYNCHRONOUS BOOST, SSM AND EXTERNAL AUDIO FEEDBACK
Description
Pin Assignments
The PAM8965 is an extremely high-efficiency Class-D stereo audio
power amplifier with an integrated synchronous boost converter. The
PAM8965 can drive two channels with 12W each into 4Ω speakers.
(Top View)
The integrated amplifier can achieve system efficiency of 92%
(at VBAT = 7.4V). The device consumes exceptionally low quiescent
current (10mA at VBAT = 7.4V) and very low shutdown current
(0.7μA).
40 39 38 37 36 35 34 33 32 31
1
2
30
29
28
27
26
25
24
23
22
21
VBAT1
VBAT2
PVDD
PVDD
BST
FLT
EN
3
The integrated current-mode boost converter provides regulated
power to a feature-laden Class-D stereo amplifier. These include:
RINP
RINN
LINN
LINP
SSM
VDD
GND
GND
4
5
Spread spectrum modulation (SSM) for EMI suppression (audio and
boost), which enables the use of inexpensive ferrite bead filters.
PAM8965
YYWWXX
6
SW
7
SW
Non-clipping power limit, which uses 41-step automatic gain control.
Thermal foldback, which reduces output power as the chip heats up.
8
PGND
PGND
GAIN
9
10
External audio feedback pins, which allow for customization of sound
by using feedback network design. Alternatively, these pins can be
used for Kelvin connection to speaker terminals.
11 12 13 14 15 16 17 18 19 20
GAIN pin to program audio gain at 0.5dB steps such that external
resistors are not required to adjust gain, which can result in gain error.
W-QFN5050-40 (Type US)
Out-of-audio switching for the boost converter, which minimizes
audible noise coming from components on the board.
Protection features include under-voltage and over-voltage protection
on VBAT, over-voltage protection on PVDD, short circuit protection on
all audio outputs, cycle-by-cycle current limit on boost converter,
thermal shutdown of the entire system, DC protection for speakers,
and an FLT pin that provides a fault flag.
Applications
Features
Portable electronics
Bluetooth speakers
Wireless speakers
Music instruments
High-capacitance piezo actuator drives
Virtual reality 3D active feedbacks
PDAs, GPS, game machines
Operates from 2.8V to 8.5V Supply
2 12W (10% THD+N) into 4Ω Load with VBAT = 7.4V (2SxP)
2 8W (10% THD+N) into 6Ω Load with VBAT = 3.7V (1SxP)
Auto Gain Control Responds to:
Thermal Foldback
Non-Clip Power Limit
GAIN Pin
Externally Adjustable Gain from 26dB to 6dB with 0.5dB Steps
Exceptionally High Overall System Efficiency (92% @ VBAT
7.4V)
=
Very Low IQ = 10mA (VBAT = 7.4V) for Boost + Stereo
Very Low Shutdown Current = 0.7μA
DC Protection for Speaker
Auto-Recovery on Short-Circuit Protection & Thermal Shutdown
External Audio Feedback Pins
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
For automotive applications requiring specific change
control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP
capable, and manufactured in IATF 16949 certified facilities),
please contact us or your local Diodes representative.
https://www.diodes.com/quality/product-definitions/
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
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www.diodes.com
February 2022
© Diodes Incorporated
PAM8965
Document number: DS42707 Rev. 3 - 2
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