PAM8965
12W STEREO CLASS-D AUDIO AMPLIFIER
WITH SYNCHRONOUS BOOST, SSM AND EXTERNAL AUDIO FEEDBACK 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. ROUTP RBSTP RPVDD RBSTN ROUTN RFBN PGND RFBP 35 34 33 32 31 FLT 30 EN 2 29 VBAT2 RINP 3 28 PVDD RINN 4 27 PVDD LINN 5 26 BST LINP 6 25 SW SSM 7 24 SW VDD 8 23 PGND GND 9 22 PGND GND 10 21 GAIN PAM8965
YYWWXX 14 15 16 17 18 19 VBAT1 20 PGND 13 LFBN 12 LOUTN PLIM 11 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. 36 LBSTN 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. 37 LBSTP Thermal foldback, which reduces output power as the chip heats up. 38 LPVDD Non-clipping power limit, which uses 41-step automatic gain control. 39 LFBP Spread spectrum modulation (SSM) for EMI suppression (audio and
boost), which enables the use of inexpensive ferrite bead filters. 40
1 PGND The integrated current-mode boost converter provides regulated power
to a feature-laden Class-D stereo amplifier. These include: PGND 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). GND (Top View) LOUTP Description 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. Features Applications 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: …