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Home > Products > Integrated Circuits (ICs) > Linear > Audio Amplifiers

Diodes Incorporated PAM8965ZLA40-13

Name: PAM8965ZLA40-13
Brand: Diodes Incorporated
SKU: PAM8965ZLA40-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PAM8965ZLA40-13

Manufacturer:: Diodes Incorporated

Category:: Audio Amplifiers

Package:: 40-WFQFN Exposed Pad

Datasheet:: PAM8965ZLA40-13.pdf

Description:: AUDIO LOW VOLT,W-QFN5050-40,T&R,

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PAM8965ZLA40-13 from Diodes Incorporated is a 12W stereo Class-D audio amplifier IC with integrated synchronous boost converter, differential input support, external audio feedback capability, and spread-spectrum modulation (SSM) for EMI suppression. It delivers 2 × 12W into 4Ω at 10% THD+N with VBAT = 7.4V, achieves 92% system efficiency, consumes only 10mA quiescent current, and operates across 2.8V–8.5V supply - enabling compact, high-fidelity audio in battery-powered portable speakers.

For engineers reviewing the PAM8965ZLA40-13 datasheet, PAM8965ZLA40-13 pinout, PAM8965ZLA40-13 application, or PAM8965ZLA40-13 equivalent, key selection considerations include its dual-channel BTL output architecture, Kelvin feedback terminal pairing (LFBP/LOUTP, LFBN/LOUTN), GAIN pin programmability (26dB to 6dB in 0.5dB steps), thermal foldback trip point (+125°C), and fault flag (FLT) open-drain signaling.

Technical Context

The PAM8965 integrates a current-mode synchronous boost converter (768kHz PWM / ≥75kHz PFM) delivering regulated 9.2V PVDD to two independent Class-D H-bridge amplifiers, each with chopper-stabilized integrators and 384kHz oscillator-derived PWM. Its dual feedback paths-internal loop compensation plus externally accessible Kelvin-connected LFBP/LFBN and RFBP/RFBN pins-enable precise speaker-terminal voltage regulation and customizable acoustic response via passive network design.

Control logic includes EN-driven startup (15ms to audible output), SSM-enabled synchronized spectral spreading across both boost and audio switching domains, PLIM-configurable non-clipping power limit, and AGC responding to thermal foldback, power limit violation, and GAIN pin voltage-all implemented without external DSP or mute circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	2 × 12W into 4Ω @ 10% THD+N, VBAT = 7.4V - enables loud, distortion-controlled playback from compact Li-ion 2SxP battery packs.
System Efficiency	92% @ VBAT = 7.4V, PO = 5W - eliminates need for heatsink and extends battery runtime in portable audio systems.
Quiescent Current	10mA @ VBAT = 7.4V - minimizes standby power loss in always-on Bluetooth speaker applications.
Shutdown Current	0.7μA - supports multi-week shelf life and ultra-low-power wake-on-audio designs.
THD+N	0.035% @ 5W, 4Ω, 1kHz - ensures high-fidelity reproduction without digital post-processing.
Gain Range	26dB to 6dB in 0.5dB steps via GAIN pin voltage (4.5V–0.5V) - replaces precision resistor networks and avoids gain error.
Feedback Architecture	Dedicated Kelvin feedback pins (LFBP/LFBN, RFBP/RFBN) - cancels PCB trace and speaker lead impedance effects on closed-loop accuracy.
EMI Suppression	Synchronized spread-spectrum modulation on both boost (768kHz) and audio (384kHz) switching - permits low-cost ferrite bead filtering without compromising audio integrity.

Pinout & Package

Package: W-QFN5050-40 (Type US), 5.0mm × 5.0mm × 0.8mm, exposed thermal pad requiring PCB copper connection for thermal management (θJC = 10°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 FLT	Fault flag output	Open-drain signal for VBAT UVLO/OVLO, thermal shutdown, DC detection, or audio short-circuit - enables system-level fault logging without polling.
2 EN	Enable control input	Active-high logic enables full system startup (boost + audio) in 15ms - eliminates need for external mute control.
3 RINP / 4 RINN 6 LINP / 5 LINN	Differential audio inputs	Supports noise-rejecting balanced source connection; internal biasing allows single-ended use with AC coupling.
13 LFBP / 19 LFBN 38 RFBP / 32 RFBN	External feedback terminals	Direct Kelvin connection points to speaker terminals - removes PCB trace resistance/inductance from feedback path for improved fidelity and stability.
14 LOUTP / 18 LOUTN 37 ROUTP / 33 ROUTN	BTL audio outputs	Full-bridge outputs capable of ±9.2V swing into 4Ω - deliver high power with minimal external components.
21 GAIN	Analog gain control	Voltage-controlled interface (4.5V = 26dB, 0.5V = 6dB, 100mV/0.5dB step) - enables smooth volume ramping and eliminates gain-setting resistors.
11 PLIM	Non-clipping power limit	Analog threshold setting (VDD = disabled, lower voltage = tighter limit) - prevents speaker damage while maintaining dynamic range.
24 SW / 26 BST / 27–28 PVDD 29 VBAT2 / 30 VBAT1	Boost converter interface	Integrated 768kHz synchronous boost with PFM mode below 75kHz - powers Class-D stages from single-cell or dual-cell Li-ion without external regulator.

Key Features

Feature	Design Value
Integrated synchronous boost	Delivers regulated 9.2V PVDD from 2.8–8.5V input, eliminating external DC/DC and reducing BOM count by ≥4 components.
Kelvin feedback architecture	Four dedicated feedback pins (LFBP/LFBN/RFBP/RFBN) enable direct speaker-terminal sensing - improves THD+N by up to 15dB vs. internal-only feedback.
41-step automatic gain control	Responds to thermal foldback (+125°C), non-clipping power limit, and GAIN pin voltage - maintains consistent loudness without clipping or thermal throttling artifacts.
Out-of-audio boost switching	PFM mode maintains ≥75kHz minimum frequency - prevents audible coil whine from inductors and capacitors in portable enclosures.
DC speaker protection	Monitors output offset and disables channels if >10mV DC detected - prevents speaker burnout during fault conditions or startup transients.
Synchronized spread-spectrum modulation	Joint SSM on boost and audio switching clocks eliminates beat frequencies - simplifies EMI filter design using only ferrite beads (no LC tanks required).

Applications

Bluetooth Speakers

Wireless Audio Transmitters

Use Scenario: Compact, battery-powered speaker with Bluetooth 5.x receiver and 2×4Ω drivers.

IC Role / Device Role / Timing Role: Dual-channel Class-D amplifier with integrated boost supplies clean 9.2V rail and drives speakers directly in BTL mode.

Use Value: Eliminates external boost IC and reduces total solution size by 35%, while 92% efficiency extends playtime to >10 hours on 2S Li-ion.

Use Scenario: USB-C or 3.5mm-to-wireless transmitter dongle powering remote active speakers.

IC Role / Device Role / Timing Role: Low-noise, low-THD+N stereo driver with differential inputs accepts line-level analog source and delivers robust RF-immune output.

Use Value: Integrated DC protection and 0.035% THD+N ensure clean signal transmission without added op-amp buffering or DC-blocking caps.

Portable Musical Instruments

VR Haptic Audio Systems

Use Scenario: Battery-powered guitar multi-effects pedal with built-in speaker amp and headphone output.

IC Role / Device Role / Timing Role: High-headroom amplifier supporting 26dB gain for instrument-level signals and real-time AGC for dynamic performance.

Use Value: GAIN pin voltage control enables seamless integration with MCU-based expression pedals; thermal foldback prevents overheating during sustained high-gain passages.

Use Scenario: VR headset with spatial audio and synchronized haptic feedback actuators requiring low-latency, low-noise drive.

IC Role / Device Role / Timing Role: Ultra-low-noise (70μVrms A-weighted) stereo amplifier with fast 15ms startup enables instant audio-haptic alignment.

Use Value: External feedback pins allow custom EQ networks to match actuator resonance peaks - improving tactile response fidelity without DSP overhead.

Equivalent & Alternatives

The following parts are listed as comparable options for similar stereo Class-D audio amplifier with integrated boost applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX98357AETE+T	No integrated boost; requires external 5V or higher supply; I²S input only; no analog gain control pin.	Suitable for systems with existing regulated 5V rail and digital audio sources; lacks analog input flexibility and power-limiting features.	Select when digital audio interface and minimal footprint are prioritized over analog input support and battery-voltage scalability.
TAS5756MDAPR	Higher integration (DSP, 4-channel, HD audio); requires external boost or 12V supply; larger QFN64 package; no Kelvin feedback pins.	Targeted at premium soundbars and smart displays needing parametric EQ and multi-channel processing; not optimized for space-constrained portable designs.	Select when advanced audio processing, multi-channel expansion, or HDMI ARC compatibility are required - not for cost-sensitive, single-battery portable audio.

Compared with MAX98357AETE+T and TAS5756MDAPR, the PAM8965ZLA40-13 uniquely combines analog-differential input, integrated boost, Kelvin feedback, and analog gain control in a 5×5mm package - making it optimal for battery-powered stereo audio where BOM reduction, thermal simplicity, and analog signal chain fidelity are critical.

Availability

PAM8965ZLA40-13 is available at Aetrix Electronics and suitable for Bluetooth speakers, portable musical instruments, and VR haptic audio systems requiring stable component supply, long-lifecycle assurance, and production-ready qualification.

Supply support for PAM8965ZLA40-13 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The PAM8965 belongs to Diodes' high-efficiency audio power amplifier product line, designed specifically for space-constrained, battery-operated consumer audio devices demanding integrated power conversion, low-noise performance, and robust protection.

FAQ

What is the minimum recommended speaker load impedance for PAM8965ZLA40-13 at different supply voltages?

The PAM8965ZLA40-13 supports 4Ω minimum per channel when VBAT > 5.0V (e.g., 7.4V 2SxP configuration), and 6Ω minimum per channel when VBAT ≤ 5.0V (e.g., 3.7V 1SxP configuration). These limits are enforced by internal current limiting and thermal foldback thresholds to prevent device overstress and maintain reliability under continuous operation.

How does the external feedback (LFBP/LFBN) improve audio performance compared to internal feedback only?

External feedback terminals allow Kelvin connection directly to speaker terminals, removing PCB trace resistance, bond wire inductance, and ferrite bead impedance from the feedback loop. This preserves loop gain accuracy and phase margin, reducing THD+N by up to 15dB and enabling stable operation with long speaker cables or complex passive crossovers - benefits unattainable with internal-only feedback.

Can the PAM8965ZLA40-13 operate without the external boost converter enabled?

No - the PAM8965ZLA40-13 requires PVDD to be powered, and PVDD is generated exclusively by its internal synchronous boost converter. The device has no provision for external PVDD supply; VBAT1/VBAT2 feed the boost input, and PVDD (pins 27/28) must be connected to LPVDD (pin 16) and RPVDD (pin 35) to power both Class-D channels.

What fault conditions trigger the FLT pin, and how is recovery handled?

The FLT pin asserts low (open-drain) for VBAT undervoltage lockout (UVLO < 2.7V), VBAT overvoltage lockout (OVLO > 8.95V), thermal shutdown (>150°C), DC speaker detection (>10mV offset), or audio output short-circuit. Recovery is automatic after fault removal and EN toggle; no external reset is needed, and the device reinitializes boost and audio stages within 15ms.

PAM8965ZLA40-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 40-WFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Class D

Output Type:: 2-Channel (Stereo)

Max Output Power x Channels @ Load:: 12W x 2 @ 4Ohm

Voltage - Supply:: 2.8V ~ 8.5V

Features:: -

Mounting Type:: Surface Mount

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Supplier Device Package:: W-QFN5050-40 (Type US)

PAM8965ZLA40-13 FAQ

1.How can I place an order for PAM8965ZLA40-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for PAM8965ZLA40-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PAM8965ZLA40-13 reliable?

The price and inventory of PAM8965ZLA40-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM8965ZLA40-13 is usually 5 days.

3.What payment methods are accepted for PAM8965ZLA40-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM8965ZLA40-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PAM8965ZLA40-13?

PAM8965ZLA40-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PAM8965ZLA40-13 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PAM8965ZLA40-13?

For technical support, including PAM8965ZLA40-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM8965ZLA40-13 requirements.

6.How does Aetrix verify that PAM8965ZLA40-13 is sourced from the original manufacturer or authorized distributors?

All PAM8965ZLA40-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PAM8965ZLA40-13 meets industry standards.

7.What is the process for return or replacement of PAM8965ZLA40-13?

All PAM8965ZLA40-13 units undergo pre-shipment inspection (PSI). If there is an issue with PAM8965ZLA40-13, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PAM8965ZLA40-13 part is unused and in its original packaging.

Return procedure for PAM8965ZLA40-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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