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Diodes Incorporated PAM8406DR
- Part No.:
- PAM8406DR
- Manufacturer:
- Diodes Incorporated
- Category:
- Audio Amplifiers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PAM8406DR.pdf
- Description:
- IC AMP D/AB STEREO 5W 16SOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,866
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Product details
Overview
PAM8406DR from Diodes Incorporated is a 5W stereo Class-D/Class-AB configurable audio amplifier in SOP-16L package, delivering 5W into 2Ω at 10% THD+N (5V supply), achieving ≤0.15% THD+N and 90dB SNR, with filterless operation enabling direct speaker drive in portable LCD TVs and multimedia speakers.
For engineers reviewing the PAM8406DR datasheet, PAM8406DR pinout, PAM8406DR application, or PAM8406DR equivalent, key selection criteria include dual-mode output architecture, thermal shutdown at 150°C with 30°C hysteresis, 250kHz switching frequency, 24dB fixed gain, and SOP-16L footprint compatibility for space-constrained audio subsystems.
Technical Context
The PAM8406DR integrates two-stage amplification: first-stage gain set externally (max 24dB), second-stage fixed 2× differential gain, producing fully differential outputs with 180° phase inversion. Its MODE pin selects between Class-D (250kHz switching, up to 90% efficiency) and Class-AB (lower EMI, no switching artifacts).
It features independent power domains: PVDDL/PVDDR for output stage, VDD for analog core, and dedicated PGNDL/PGNDR/GND planes to minimize crosstalk. Protection includes undervoltage lockout (2.0V trip), auto-recovering short-circuit protection, and non-latched thermal shutdown with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 5W into 2Ω @ 10% THD+N, 5V supply - enables loud, battery-efficient stereo playback in compact enclosures |
| THD+N | ≤0.15% @ 1W, 1kHz, 8Ω - preserves audio fidelity across full output range without audible distortion |
| SNR | 90dB A-weighted - ensures clean signal reproduction with minimal background noise in quiet environments |
| Efficiency | 90% @ 8Ω, Class-D mode - extends single-cell Li-ion or 4×Ni-MH battery life in portable systems |
| Supply Range | 2.5V–5.5V - supports wide input from 3×alkaline (4.5V) to regulated 5V rails without external LDO |
| Switching Freq | 250kHz Class-D - avoids audible band interference while enabling small external LC filtering if required |
| Gain | 24dB fixed closed-loop - eliminates external gain-setting resistors, reducing BOM count and layout sensitivity |
Pinout & Package
Package: SOP-16L (SOIC-16, 3.9mm × 9.9mm, 1.27mm pitch, exposed pad optional per PAM8406ER variant; PAM8406DR uses standard SOP-16 without EP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | +OUT_L / +OUT_R | Differential positive outputs - drive speaker terminals directly in filterless Class-D mode |
| 3, 14 | −OUT_L / −OUT_R | Differential negative outputs - complete H-bridge paths; require matched trace routing for EMI control |
| 2, 15 | PGNDL / PGNDR | Power ground returns for left/right output stages - must be low-inductance copper pours tied to exposed pad (if used) |
| 4, 13 | PVDDL / PVDDR | Separate power inputs for left/right output drivers - decoupling capacitors placed locally prevent cross-channel supply coupling |
| 5 | MUTE | Active-low mute control with internal pull-up - enables silent turn-on/off without pop/click when coordinated with input signal ramping |
| 9 | MODE | Digital mode select: high = Class-D (high-efficiency), low = Class-AB (low-EMI); must not float |
| 12 | SHDN | Active-low shutdown with internal pull-up - reduces quiescent current to <1µA for zero-power standby |
| 8 | VREF | Analog reference output - requires 0.47–1.0µF ceramic bypass capacitor to suppress PSRR degradation and startup pop |
Key Features
| Feature | Design Value |
|---|---|
| Filterless Class-D Architecture | Eliminates external LC filters and DC-blocking capacitors - saves ≥30mm² PCB area and reduces BOM cost by 4–6 passive components |
| No Pop/Click at Power Cycle | Controlled startup via VREF bypass and MUTE/SHDN sequencing - prevents transient spikes that damage speakers or annoy users |
| Dual-Mode Output Configuration | Hardware-selectable Class-D (efficiency) or Class-AB (EMI) via MODE pin - allows single design to meet both portable battery-life and EMC compliance targets |
| Fully Differential Outputs | Reduces common-mode noise and doubles effective output swing - delivers 5W into 2Ω using only 5V supply without rail-splitting |
| Integrated Protection Suite | Auto-recovering short-circuit, non-latched thermal shutdown (150°C/120°C), UVLO (2.0V), and overcurrent limiting - enables robust field operation without external supervision |
Applications
| LCD TV Audio Subsystem | Multimedia Speaker Dock |
|---|---|
|
Use Scenario: Integrated stereo audio output for 15–32-inch LCD/LED TVs with space-constrained mainboard layouts. IC Role / Device Role / Timing Role: Primary stereo power amplifier driving 4Ω or 8Ω speakers directly from 5V rail, operating in Class-D mode for thermal headroom. Use Value: Filterless operation eliminates bulky inductors, enabling thinner TV bezels; 90dB SNR ensures clear dialogue reproduction in living-room ambient noise. |
Use Scenario: Compact desktop speaker system with USB/Bluetooth audio input and battery backup option. IC Role / Device Role / Timing Role: Dual-channel amplifier configured in Class-D for AC-powered mode and Class-AB for battery-powered low-EMI operation. Use Value: 5W/channel output drives 3-inch full-range drivers at concert-level volume; 90% efficiency extends 2000mAh Li-ion runtime to >6 hours at 70% volume. |
| Portable AM/FM Radio Receiver | DAB Digital Audio Broadcast Tuner |
|
Use Scenario: Handheld or tabletop AM/FM radio with mono-to-stereo upmix and speaker output. IC Role / Device Role / Timing Role: Stereo amplifier accepting line-level input from tuner IC, powered from 3×AA alkaline (4.5V) with UVLO preventing brownout distortion. Use Value: 0.15% THD+N preserves fidelity of analog broadcast signals; MUTE pin synchronizes with tuner channel change to eliminate tuning thumps. |
Use Scenario: DAB+ receiver module for automotive or home audio with digital-to-analog conversion and analog output stage. IC Role / Device Role / Timing Role: Final analog output driver receiving DAC output, operating in Class-AB mode to avoid RF interference with DAB antenna circuits. Use Value: Low 100µV A-weighted noise floor prevents hiss masking weak DAB multiplex signals; PSRR of −70dB rejects digital supply noise from SoC domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stereo audio amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPA2013D1RTJR | Single-ended outputs, requires DC-blocking caps; 3.2W into 4Ω @ 5V; 85% efficiency | Not filterless - needs 2×220µF electrolytics per channel; higher board area and cost | Select when legacy single-ended speaker interface or lower THD (<0.05%) at mid-power is prioritized over PCB area |
| MAX9718ETA+ | Differential outputs, but Class-AB only; 2.5W into 4Ω @ 5V; 65% efficiency; no MODE pin | Lacks Class-D option - unsuitable for battery-operated designs requiring >4-hour runtime | Select when ultra-low EMI is mandatory (e.g., near sensitive RF receivers) and efficiency is secondary |
Compared with TPA2013D1RTJR and MAX9718ETA+, the PAM8406DR uniquely combines filterless differential Class-D operation, hardware-selectable output mode, and integrated protection - making it optimal for cost-sensitive, space-constrained portable audio where both battery life and EMI compliance must be balanced.
Availability
PAM8406DR is available at Aetrix Electronics and suitable for LCD TV audio subsystems, portable multimedia speakers, AM/FM radio receivers, and DAB digital tuners requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for PAM8406DR 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 ICs, with manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q200 for industrial reliability.
The PAM8406DR belongs to Diodes' PAM audio amplifier product line, designed specifically for high-efficiency, low-EMI stereo playback in space- and power-constrained consumer electronics - emphasizing integration, protection, and flexible output architecture.
FAQ
What is the recommended bypass capacitor value for the VREF pin?
A ceramic capacitor of 0.47µF to 1.0µF must be placed directly between VREF and GND. This capacitor stabilizes the internal analog reference during startup and shutdown, minimizing pop/click noise and improving PSRR by >10dB. Values outside this range degrade THD+N performance and increase turn-on transients.
Can the PAM8406DR drive 2Ω speakers in Class-AB mode?
No. The 5W rating at 2Ω applies exclusively to Class-D mode. In Class-AB mode, maximum output is 3W into 4Ω at 10% THD+N with 5V supply. Driving 2Ω loads in Class-AB exceeds safe junction temperature limits due to higher conduction losses and reduced thermal margin.
Is the MODE pin internally biased, or does it require an external pull-up/down?
The MODE pin has no internal bias and must be driven actively high (≥1.4V) or low (≤0.4V) - floating is prohibited. A 10kΩ pull-down resistor ensures reliable Class-AB default on power-up; a microcontroller GPIO provides dynamic mode switching during operation.
How does the PAM8406DR handle short-circuit faults on its outputs?
Upon detecting output-to-GND or output-to-output short, the PAM8406DR immediately disables both channels and enters auto-recovery mode. Once the fault clears, normal operation resumes within 10ms without external reset. This behavior is confirmed in Electrical Characteristics Table (OTP/SCP section) and Application Note page 10.
PAM8406DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Class D, Class AB
- Output Type:
- 2-Channel (Stereo)
- Max Output Power x Channels @ Load:
- 5W x 2 @ 2Ohm
- Voltage - Supply:
- 2.5V ~ 5.5V
- Features:
- Depop, Short-Circuit and Thermal Protection
- Mounting Type:
- Surface Mount
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SOP
PAM8406DR FAQ
1.How can I place an order for PAM8406DR through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM8406DR 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 PAM8406DR reliable?
The price and inventory of PAM8406DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM8406DR is usually 5 days.
3.What payment methods are accepted for PAM8406DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM8406DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM8406DR?
PAM8406DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM8406DR 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 PAM8406DR?
For technical support, including PAM8406DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM8406DR requirements.
6.How does Aetrix verify that PAM8406DR is sourced from the original manufacturer or authorized distributors?
All PAM8406DR 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 PAM8406DR meets industry standards.
7.What is the process for return or replacement of PAM8406DR?
All PAM8406DR units undergo pre-shipment inspection (PSI). If there is an issue with PAM8406DR, 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 PAM8406DR part is unused and in its original packaging.
Return procedure for PAM8406DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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