PAM8965
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PAM8965 12W STEREO CLASS-D AUDIO AMPLIFIER WITH SYNCHRONOUS BOOST, SSM AND EXTERNAL AUDIO FEEDBACK 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. 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). 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. 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. Thermal foldback, which reduces output power as the chip heats up. Non-clipping power limit, which uses 41-step automatic gain control. Spread spectrum modulation (SSM) for EMI suppression (audio and boost), which enables the use of inexpensive ferrite bead filters. The integrated current-mode boost converter provides regulated power to a feature-laden Class-D stereo amplifier. These include: 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. 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-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/ Portable Electronics Bluetooth Speakers Wireless Speakers Music Instruments High-Capacitance Piezo Actuator Drive Virtual Reality 3D Active Feedback PDA, GPS, Game Machines 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.

PAM8965 Typical Applications Circuit + RFBP RBSTP ROUTP Right Input Left Input OFF RINN LINP ROUTN RBSTN RFBN LFBP LBSTP LOUTP LOUTN LBSTN LFBN GND Pin Name I/O/P FLT O EN I RINP I RINN I LINN I LINP I SSM I VDD O GND — PLIM I PGND — LFBP I LOUTP O LBSTP P LPVDD P LBSTN P LOUTN O LFBN I PGND SW BST PVDD VBAT2 VBAT1 PGND RFBN ROUTN RBSTN RPVDD RBSTP ROUTP RFBP GND Description Fault flag. Open-drain output to signal system faults (VBAT UVLO or OVLO, OTP, DC input, audio SCP) Chip enable. High = ON, Low = OFF. Do not float this pin. Right channel audio input – Positive Right channel audio...

PAM8965 Functional Block Diagram VBAT Boost Converter Sample & Hold Driver PLIM RFBN PGND UVLO / OVLO ON/OFF De-pop Thermal Protection Short Protection LFBP LBSTP Sample & Hold Driver AGC & Feedback Control LFBN PGND Figure 1. PAM8965 Block Diagram

PAM8965 Absolute Maximum Ratings (@TA = +25° unless otherwise specified.) (Note 4) C, Symbol Audio Input Voltage VRINP, VRINN, VLINP, VLINN Supply Voltage (Pins VBAT1, VBAT2) VPLIM, VGAIN, VSSM Control Input Voltage Control Input Voltage Maximum Operating Junction Temperature (Note 5) Storage Temperature Range Human Body Model Charged Device Model Stresses greater than the Absolute Maximum Ratings specified above can cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this...

PAM8965 Electrical Characteristics (VBAT = 7.4V, TA = +25° RL = 4Ω + 2  33μH, VPLIM = VGAIN = VDD, unless otherwise specified.) C, Symbol Test Condition Input Supply Voltage High-Level Input Voltage Low-Level Input Voltage VBAT Rising VBAT Falling System Efficiency (Boost + Stereo) Quiescent Current Shutdown Current VBAT Falling VBAT Rising VBAT OVLO Threshold VBAT UVLO Threshold Thermal Shutdown Threshold Thermal Shutdown Hysteresis Thermal Foldback Trip Point Boost Converter (VBAT = 7.4V, TA = +25° RL = 4Ω + 2  33μH, VPLIM = VGAIN = VDD, unless otherwise specified.) C, Symbol Test...

PAM8965 Class-D Amplifier (VBAT = 7.4V, TA = +25° RL = 4Ω + 2  33μH, VPLIM = VGAIN = VDD, unless otherwise specified.) C, Symbol Continuous Output Power, 1SxP (per Channel) (Note 7) THD+N Total Harmonic Distortion + Noise Integrated Output Noise Power Supply Rejection Ratio Signal-to-Noise Ratio Gain = 20dB VIN @ AC Ground, 20Hz to 22kHz SSM Off Gain = 26dB VIN @ AC Ground, 20Hz to 22kHz SSM Off VIN = AC Ground ±100mV Supply Ripple Gain = 26dB THD+N = 1%, Gain = 26dB, A-Weighted, SSM Off Continuous Output Power, 2SxP (per Channel) (Note 6) Test Condition Output Offset Voltage Audio...

PAM8965 Performance Characteristics (VBAT = 7.4V, TA = +25° RL = 4Ω + 33μH, VGAIN = VDD, SSM On, unless otherwise specified.) C, 1. VBAT = 7.4V, SSM ON, RL = 4Ω 100Hz: Magenta 1kHz: Blue 10kHz: Red VBAT = 3.7V, SSM ON, RL = 6Ω 100Hz: Magenta 1kHz: Blue 10kHz: Red VBAT = 7.4V, SSM ON, RL = 4Ω 1W: Blue 2W: Magenta 3W: Red VBAT = 3.7V, SSM ON, RL = 6Ω 1W: Blue 2W: Magenta 3W: Red Frequency Response Noise Floor