BA5204F

Overview

The BA5204F is a dual-channel power amplifier designed for 3V stereo headphone applications. It delivers a rated output of 35mW into a 32Ω load at 3V supply. The device operates down to 1.5V with low quiescent current of 13mA. Key electrical parameters include excellent ripple rejection ratio of 38dB, low distortion of 0.05% at 5mW output, and good channel separation of 60dB typical. Input coupling capacitors are not required due to the PNP input stage.

Feature Summary

• Eliminates pop noise during power switching via internal timing circuit
• Direct input capability without requiring external coupling capacitors
• Operates effectively at low voltage starting from 1.5V
• Provides high ripple rejection to minimize interference from motor or tape systems

Applications

• 3V compact cassette headphone stereo players
• Micro cassette players
• FM stereo radios

Procurement Notes

Verify the specific package type and marking code against the manufacturer's official datasheet before procurement. Confirm that the ordering suffix matches the required pin configuration and thermal characteristics. Ensure compatibility with the intended PCB layout regarding the symmetrical pin assignments mentioned in the documentation.

Selection Notes

Select this component for battery-powered audio devices requiring minimal external components. The absence of input coupling capacitors simplifies the design and reduces board space. Consider the 1.5V minimum operating voltage for low-power applications where efficiency is critical. Verify that the 35mW output rating meets the impedance requirements of the connected headphones.

Part Context

This device belongs to Rohm Semiconductor's audio IC family, specifically categorized as a dual power amplifier. It is engineered for consumer electronics such as portable tape players and radios. The design focuses on reducing external component count while maintaining high fidelity and low distortion suitable for Hi-Fi applications.

Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer's portfolio. Verify that any substitute maintains the 35mW output capability and 1.5V minimum operating voltage. Ensure the replacement also features the no-pop startup circuit and direct input architecture to preserve the original design benefits.