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Diodes Incorporated PAM8301AAF
- Part No.:
- PAM8301AAF
- Manufacturer:
- Diodes Incorporated
- Category:
- Audio Amplifiers
- Package:
- SOT-23-6
- Datasheet:
-
PAM8301AAF.pdf
- Description:
- IC AMP CLASS D MONO 1.5W SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,259
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Product details
Overview
PAM8301AAF from Diodes Incorporated is a filterless Class-D mono audio amplifier delivering 1.5W into 8Ω at 10% THD+N with 5V supply, featuring 88% peak efficiency, 24dB fixed gain, and SOT23-6 packaging. It drives speakers directly without output LC filters, reducing BOM cost and PCB area in battery-powered portable audio systems.
For engineers reviewing the PAM8301AAF datasheet, PAM8301AAF pinout, PAM8301AAF application, or PAM8301AAF equivalent, key selection criteria include filterless operation, shutdown control (active-low SD), thermal shutdown at 135°C, THD+N as low as 0.2% at 200mW, and compatibility with 2.5–5.5V supply rails in space-constrained designs.
Technical Context
The PAM8301AAF integrates a two-stage amplifier architecture: the first stage offers externally configurable gain via RF/RI ratio (max 24dB), while the second stage provides fixed 2× differential inversion. Its 200–300kHz oscillator enables high-frequency PWM switching for low EMI and efficient power delivery.
It implements under-voltage lockout (UVLO) triggering at 2.1V, short-circuit protection, and thermal shutdown with 30°C hysteresis. Quiescent current is 4–8mA, and shutdown current drops to 1µA, supporting ultra-low-power idle states in portable devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 1.5W @ 10% THD+N, 8Ω, 5V - sufficient for compact speaker playback without heatsinking |
| THD+N | 0.2% @ 200mW, 8Ω - preserves audio fidelity at low-to-mid volumes |
| Peak Efficiency | 88% @ 1kHz - extends battery runtime vs. Class-AB alternatives |
| Supply Range | 2.5–5.5V - compatible with single-cell Li-ion (3.0–4.2V) and 5V USB-supplied systems |
| Gain | 24dB fixed - eliminates external gain-setting resistors for simplified layout |
| PSRR | 50dB @ 1kHz - rejects ripple from noisy shared power rails |
| SNR | 78dB (20Hz–20kHz) - ensures clean signal path with minimal background noise |
| Oscillator Freq | 250kHz typ - balances EMI suppression and MOSFET switching loss |
Pinout & Package
Supplied in a thermally enhanced SOT23-6 package (2.9mm × 2.8mm × 1.3mm), the PAM8301AAF uses a 6-pin configuration optimized for minimal footprint and direct speaker connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT− | Negative output terminal | Differential speaker drive node; requires no external LC filter due to integrated modulation scheme |
| 2: GND | Power and signal reference | Primary thermal and electrical return path; must be low-impedance for stability and EMI control |
| 3: IN | Analog audio input | High-impedance (10kΩ) single-ended input accepting AC-coupled line-level signals |
| 4: SD | Shutdown control | Active-low logic input; pulls <0.4V to disable amplifier and reduce IQ to 1µA |
| 5: VDD | Positive supply rail | Accepts 2.5–5.5V; requires local 1.0µF ceramic + 10µF bulk decoupling per datasheet layout guidelines |
| 6: OUT+ | Positive output terminal | Differential speaker drive node; forms push-pull output pair with OUT− for filterless operation |
Key Features
| Feature | Design Value |
|---|---|
| Filterless architecture | Eliminates external LC output filters, saving ≥30mm² PCB area and two passive components |
| Low quiescent current | 4–8mA operating current enables >100hr battery life in 200mAh portable speaker applications |
| Integrated protection | Thermal shutdown (135°C), short-circuit detection, and UVLO (2.1V) prevent field failures |
| Low-EMI design | Ferrite-bead-compatible layout and 250kHz switching minimize radiated emissions without shielding |
| A-weighted noise floor | 120µV - enables use with sensitive micro-speakers without audible hiss |
Applications
| Portable Media Players | Bluetooth Speaker Systems |
|---|---|
Use Scenario: Compact MP3 players with mono speaker output requiring long battery life and minimal board space. IC Role / Device Role / Timing Role: Mono Class-D audio driver with integrated shutdown control and filterless output stage. Use Value: Delivers 1.5W clean output using only two external capacitors and no inductors, reducing total solution size by 40% vs. filtered Class-D. | Use Scenario: Battery-powered Bluetooth speakers with single full-range driver and basic volume control. IC Role / Device Role / Timing Role: Primary audio power stage converting DAC output to speaker drive with 88% efficiency. Use Value: Enables >8hr playback on 1200mAh Li-ion cell while maintaining THD+N <0.3% at 0.5W output level. |
| Walkie-Talkie Handsets | Handsfree Speakerphones |
Use Scenario: Half-duplex voice communication devices needing loud, intelligible audio in noisy environments. IC Role / Device Role / Timing Role: High-SNR mono amplifier driving 8Ω ceramic speaker with fast turn-on/off via SD pin. Use Value: 78dB SNR and 50dB PSRR ensure voice clarity even when powered from shared RF-sensitive DC-DC converters. | Use Scenario: Conference speakerphones with echo cancellation ICs requiring low-noise analog output stage. IC Role / Device Role / Timing Role: Final-stage audio driver with A-weighted 120µV noise floor and 24dB gain matching codec output levels. Use Value: Prevents noise coupling into microphone preamp paths, improving full-duplex call quality without additional shielding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mono Class-D audio amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PAM8304 | Higher output (3W @ 8Ω), wider supply range (2.2–5.5V), same SOT23-6 package | Better suited for louder speaker requirements; includes improved EMI filtering circuitry | Select when >1.5W output or tighter EMI compliance (e.g., FCC Part 15 Class B) is required |
| TPA2012D2 | Dual-channel (stereo), 1.2W per channel, 2.5–5.5V, 16-pin QFN package | Requires larger footprint and stereo routing; lacks filterless architecture (needs LC filters) | Choose only if stereo output is mandatory and PCB area is not constrained |
Compared with PAM8301AAF, PAM8304 offers higher power and enhanced EMI robustness in identical form factor, while TPA2012D2 trades mono simplicity for stereo capability at the cost of added passives and layout complexity.
Availability
PAM8301AAF is available at Aetrix Electronics and suitable for portable media players, Bluetooth speaker systems, walkie-talkie handsets, and handsfree speakerphones requiring stable component supply and long-lifecycle support.
Supply support for PAM8301AAF 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and audio solutions for consumer and industrial markets.
The PAM8301AAF belongs to Diodes' PAM family of Class-D audio amplifiers, designed specifically for ultra-compact, battery-efficient portable audio applications where PCB area and power consumption are critical constraints.
FAQ
What is the minimum supply voltage for reliable operation of the PAM8301AAF?
The PAM8301AAF operates reliably from 2.5V to 5.5V. Below 2.5V, under-voltage lockout activates at 2.1V, disabling output to prevent distortion and instability. At 2.5V, it delivers ~0.8W into 8Ω with 10% THD+N, making it functional across most discharged states of single-cell Li-ion batteries.
Does the PAM8301AAF require external output filtering for FCC compliance?
No external LC filter is required due to its filterless architecture, but a ferrite bead (e.g., 600Ω @ 100MHz) on each output line is recommended per datasheet Figure 1 to meet FCC Part 15 Class B radiated emissions limits. Short speaker traces (<20cm) further reduce EMI risk without added components.
How does the shutdown pin (SD) behave during power-up sequencing?
The SD pin must be held high (>1.2V) for normal operation; pulling it low (<0.4V) disables the amplifier and reduces supply current to 1µA. To avoid pop noise, assert SD low before powering VDD and release it after VDD stabilizes above 2.5V - this sequence is validated in Diodes' application notes for clean turn-on.
Can the PAM8301AAF drive a 4Ω speaker load?
Driving 4Ω is not recommended: the datasheet specifies performance only for 8Ω loads. Lower impedance increases current demand beyond safe SOA limits, risking thermal shutdown or reduced reliability. For 4Ω applications, Diodes recommends PAM8304 or PAM8403, which are rated for 4Ω operation with appropriate derating.
PAM8301AAF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- Class D
- Output Type:
- 1-Channel (Mono)
- Max Output Power x Channels @ Load:
- 1.5W x 1 @ 8Ohm
- 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:
- SOT-23-6
PAM8301AAF FAQ
1.How can I place an order for PAM8301AAF through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM8301AAF 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 PAM8301AAF reliable?
The price and inventory of PAM8301AAF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM8301AAF is usually 5 days.
3.What payment methods are accepted for PAM8301AAF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM8301AAF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM8301AAF?
PAM8301AAF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM8301AAF 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 PAM8301AAF?
For technical support, including PAM8301AAF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM8301AAF requirements.
6.How does Aetrix verify that PAM8301AAF is sourced from the original manufacturer or authorized distributors?
All PAM8301AAF 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 PAM8301AAF meets industry standards.
7.What is the process for return or replacement of PAM8301AAF?
All PAM8301AAF units undergo pre-shipment inspection (PSI). If there is an issue with PAM8301AAF, 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 PAM8301AAF part is unused and in its original packaging.
Return procedure for PAM8301AAF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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