PAM8303CBSCA

Overview

The PAM8303CBSCA is a mono Class-D audio power amplifier manufactured by Diodes Incorporated. It delivers 3W output at 10% THD+N with a 4Ω load at 5V supply. The device operates on a single supply voltage ranging from 2.8V to 5.5V and achieves up to 90% efficiency. It features ultra-low EMI performance, exceeding FCC Class-B standards by 20dB at 300MHz. The amplifier includes short-circuit protection and thermal shutdown. It is available in MSOP-8 and U-DFN3030-8 packages.

Feature Summary

• Filterless architecture eliminates the need for external output filters, reducing component count and PCB area.
• Ultra-low EMI design provides superior noise immunity compared to standard FCC Class-B limits.
• High power supply ripple rejection (PSRR) minimizes audible noise interference.
• Integrated safety mechanisms include short-circuit protection and thermal shutdown.

Applications

• Cellular phones and smart phones
• MP4/MP3 media players
• GPS navigation systems
• Digital photo frames
• Portable game machines

Procurement Notes

Verify the specific ordering suffix 'BSC' corresponds to the MSOP-8 package variant as listed in the official datasheet. Confirm RoHS compliance status and check for End-of-Life notices or recommended alternative part numbers before finalizing procurement plans.

Selection Notes

Select this component for portable applications requiring high efficiency and minimal external components. Ensure input resistor matching is maintained for optimal CMRR and PSRR performance. Verify that the operating temperature range of -40°C to +85°C meets system requirements.

Part Context

This component belongs to the PAM8303C series of filterless mono Class-D audio amplifiers. It is designed specifically for battery-powered mobile devices where space constraints and power efficiency are critical. The product line emphasizes low electromagnetic interference to prevent disruption of wireless communication signals.

Replacement Considerations

The datasheet recommends using the PAM8304 as an alternative for new designs. Other similar parts include the LM48511 and PAM8303D, though pinouts and specifications should be verified against official documentation.

FAQ

Does the PAM8303CBSC require an external LC filter?

No, the PAM8303CBSC utilizes a filterless architecture that allows direct driving of speakers without external output filters.

What is the maximum supply voltage for this amplifier?

The recommended operating supply voltage range is 2.8V to 5.5V.

How does the device handle over-temperature conditions?

The amplifier incorporates thermal shutdown circuitry that disables outputs if the junction temperature exceeds approximately 135°C, resuming operation once the temperature drops by about 30°C.