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Diodes Incorporated PAM8303CBSC
- Part No.:
- PAM8303CBSC
- Manufacturer:
- Diodes Incorporated
- Category:
- Audio Amplifiers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
PAM8303CBSC.pdf
- Description:
- IC AMP CLASS D MONO 3W 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,447
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Product details
Overview
PAM8303CBSC from Diodes Incorporated is a 3W filterless mono Class-D audio power amplifier with differential input, 90% peak efficiency at 1W/8Ω, <1µA shutdown current, and ±0.3V logic-compatible shutdown control-designed for space-constrained portable audio systems including smartphones and MP3 players.
For engineers reviewing the PAM8303CBSC datasheet, PAM8303CBSC pinout, PAM8303CBSC application, or PAM8303CBSC equivalent, key selection criteria include its ultra-low EMI (-20dB vs FCC Class-B @300MHz), 2.8–5.5V supply range, thermal shutdown behavior, and MSOP-8 package compatibility with compact PCB layouts.
Technical Context
The PAM8303CBSC implements a BTL (bridge-tied load) output stage with fully differential analog input architecture, enabling high PSRR (−63dB @217Hz) and CMRR (40–63dB) to reject supply noise and common-mode interference without external input filtering. Its 370kHz fixed-frequency PWM switching drives 4Ω or 8Ω loads directly.
It integrates undervoltage lockout (2.3V trip), non-latching thermal protection (135°C trip with 30°C hysteresis), and pop/click suppression via internal reference ramping-ensuring robust operation in battery-powered devices with dynamic voltage profiles and frequent power cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 3.0W @10% THD+N into 4Ω at 5V supply-enables loud, clear audio from single-cell Li-ion or USB-powered systems. |
| THD+N | 0.20% @1W/8Ω, 1kHz-meets fidelity requirements for consumer-grade portable playback without post-processing. |
| PSRR | −63dB @217Hz-rejects GSM burst noise and DC-DC converter ripple without additional supply filtering. |
| Efficiency | 90% peak @1W/8Ω-minimizes thermal load and extends battery runtime in handheld devices. |
| Shutdown Current | <1µA-supports multi-week standby in always-on audio interfaces like smart speakers or voice assistants. |
| Supply Range | 2.8V to 5.5V-covers full discharge curve of Li-ion (3.0–4.2V) and USB 5V operation without regulators. |
| EMI Performance | −20dB below FCC Class-B limit @300MHz-eliminates need for external EMI filters in most smartphone-level designs. |
Pinout & Package
The PAM8303CBSC is packaged in an MSOP-8 surface-mount package (3.0mm × 4.9mm × 1.1mm), optimized for thermal dissipation in thin-profile portable enclosures and compatible with standard reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT+ | Positive BTL Output | Drives one side of speaker load; requires no LC filter due to integrated spread-spectrum modulation. |
| PVDD | Power Supply Input | Dedicated high-current path for output stage; must be decoupled with 1µF ceramic + 10µF bulk capacitor. |
| VDD | Analog Power Supply | Supplies bias circuitry and input stage; separate from PVDD to isolate analog noise from switching currents. |
| IN− | Negative Differential Input | Accepts inverted audio signal; matched impedance with IN+ enables >40dB CMRR and noise cancellation. |
| IN+ | Positive Differential Input | Accepts non-inverted audio signal; 150kΩ input resistance sets gain when paired with external feedback network. |
| SD | Shutdown Control (Active Low) | Logic-level input; pulls low to disable amplifier and reduce quiescent current to sub-µA level. |
| GND | Ground Reference | Common return for analog and power sections; requires dedicated low-impedance plane per layout guidelines. |
| OUT− | Negative BTL Output | Drives opposite side of speaker load; complements OUT+ to deliver 2× voltage swing across load. |
Key Features
| Feature | Design Value |
|---|---|
| Filterless BTL Architecture | Eliminates external LC output filter-reduces BOM count by ≥4 components and saves ≥12mm² PCB area. |
| Ultra-Low EMI Emission | Meets FCC Class-B without ferrite beads in most layouts; optional bead adds margin for high-density RF environments. |
| Differential Input Stage | Rejects common-mode noise from codecs or DACs; enables direct connection to baseband processors without AC-coupling caps. |
| Integrated Pop/Click Suppression | Ramps internal reference voltage on power-up/shutdown-prevents audible transients without external mute sequencing. |
| Thermal Protection with Hysteresis | Shuts down at 135°C and recovers at 105°C-avoids oscillatory shutdown during sustained high-power playback. |
Applications
| Smartphone Audio Amplifier | Portable Media Player |
|---|---|
Use Scenario: Driving mono earpiece or bottom-firing speaker in slim smartphone chassis with limited board space and strict EMI limits. IC Role / Device Role / Timing Role: Class-D audio power amplifier delivering 3W peak into 4Ω load with differential input interface to baseband processor. Use Value: Enables loud, distortion-free audio while meeting FCC radiated emissions without external filters-reducing system cost and height. | Use Scenario: Audio output stage in MP3/MP4 players powered by single Li-ion cell (3.0–4.2V). IC Role / Device Role / Timing Role: Filterless mono amplifier accepting line-level differential input from DAC, operating across full battery voltage range. Use Value: Delivers consistent 1.8W output at 3.6V and 1.35W at 3.2V-maintaining volume and clarity as battery discharges. |
| Digital Photo Frame Speaker | Electronic Dictionary Audio |
Use Scenario: Compact audio playback in 7–10 inch photo frames with integrated speaker and USB/SD card playback. IC Role / Device Role / Timing Role: Mono Class-D driver interfacing with low-power MCU audio subsystem via differential input. Use Value: Achieves 85dB SNR and <0.25% THD+N at 0.5W-supporting clear voice prompts and music playback without audible noise floor. | Use Scenario: Voice output in handheld electronic dictionaries requiring long battery life and minimal acoustic artifacts. IC Role / Device Role / Timing Role: Low-quiescent amplifier with <1µA shutdown current, activated only during speech playback. Use Value: Extends alkaline AA battery life to >12 months in typical usage-due to near-zero static current in idle state. |
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 |
|---|---|---|---|
| PAM8303CBYC | Same die, U-DFN3030-8 (3.0×3.0mm) package-lower θJA (47.9°C/W) than MSOP-8 (180°C/W). | Better thermal performance in thermally constrained layouts; requires different PCB footprint and reflow profile. | Select when board space is tighter than thermal margin, or when using ground-plane-enhanced thermal pads. |
| TPA2012D2RTJR | TI part with 2.1W output, 85% efficiency, and integrated boost converter-requires no external VDD regulation. | Supports lower supply voltages (1.8–5.5V); adds complexity with boost inductor but enables louder output from weak batteries. | Select when operating below 2.8V or needing higher output into 8Ω at low VDD-accepting added BOM and layout overhead. |
Compared with PAM8303CBSC, the PAM8303CBYC offers superior thermal management in dense layouts, while the TPA2012D2RTJR extends low-voltage operation via integrated boost-but both require layout changes and lack the PAM8303CBSC's −20dB EMI margin at 300MHz.
Availability
PAM8303CBSC is available at Aetrix Electronics and suitable for smartphone audio subsystems, portable media players, digital photo frames, and electronic dictionaries requiring stable component supply, RoHS-compliant packaging, and production-ready MSOP-8 footprints.
Supply support for PAM8303CBSC 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, computing, and industrial markets.
The PAM8303C belongs to Diodes' Class-D audio amplifier product line-engineered specifically for ultra-low EMI, filterless operation, and minimal external component count in battery-powered portable electronics.
FAQ
What is the recommended input configuration for optimal noise rejection?
Use matched 1% tolerance resistors (e.g., 150kΩ) for differential input termination to maintain >40dB CMRR and minimize second-harmonic distortion. Place resistors within 2mm of IN+/IN− pins and use low-leakage ceramic capacitors (≥10nF) for AC coupling to prevent DC offset and preserve headroom.
How does the PAM8303CBSC handle thermal overload during continuous 3W output?
At junction temperatures exceeding 135°C, the device enters non-latching thermal shutdown-disabling outputs until die temperature falls to ~105°C. This 30°C hysteresis prevents oscillation and audible "motorboating"; recovery is automatic with no external reset required.
Can the PAM8303CBSC drive an 8Ω speaker at full rated power?
Yes-it delivers 1.8W at 10% THD+N into 8Ω at 5V supply, and 1.5W at 1% THD+N. For higher fidelity, operate at ≤1W into 8Ω where THD+N drops to 0.20%, matching typical portable speaker sensitivity and enclosure constraints.
Is external EMI filtering required for FCC compliance?
No-its −20dB margin against FCC Class-B limits at 300MHz eliminates mandatory external filtering in most smartphone-grade PCB layouts. A 0603 ferrite bead (e.g., TDK MPZ1608S101A) may be added for margin in high-RF-noise environments or dense antenna proximity.
PAM8303CBSC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- Class D
- Output Type:
- 1-Channel (Mono)
- Max Output Power x Channels @ Load:
- 3W x 1 @ 4Ohm
- Voltage - Supply:
- 2.8V ~ 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:
- 8-MSOP
PAM8303CBSC FAQ
1.How can I place an order for PAM8303CBSC through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM8303CBSC 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 PAM8303CBSC reliable?
The price and inventory of PAM8303CBSC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM8303CBSC is usually 5 days.
3.What payment methods are accepted for PAM8303CBSC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM8303CBSC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM8303CBSC?
PAM8303CBSC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM8303CBSC 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 PAM8303CBSC?
For technical support, including PAM8303CBSC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM8303CBSC requirements.
6.How does Aetrix verify that PAM8303CBSC is sourced from the original manufacturer or authorized distributors?
All PAM8303CBSC 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 PAM8303CBSC meets industry standards.
7.What is the process for return or replacement of PAM8303CBSC?
All PAM8303CBSC units undergo pre-shipment inspection (PSI). If there is an issue with PAM8303CBSC, 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 PAM8303CBSC part is unused and in its original packaging.
Return procedure for PAM8303CBSC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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