BA5415A

Overview

The BA5415A is a dual-channel audio power amplifier IC manufactured by ROHM. It delivers 5.4 W output at VCC=12V, RL=3Ω, THD=10%, and 2.5 W at VCC=9V, RL=4Ω, THD=10%. The device operates within a supply voltage range of 5.0 V to 18.0 V. Key electrical parameters include a closed-loop voltage gain of 45 dB, total harmonic distortion of 0.1% at 1 kHz, and ripple rejection of 60 dB at 100 Hz. It features built-in thermal shutdown and standby switching capabilities.

Feature Summary

• High output power capability with excellent audio quality characterized by low total harmonic distortion and high ripple rejection.
• Built-in thermal shutout circuit protects the device from damage during overload or insufficient heat dissipation conditions.
• Integrated standby switch function allows for power control without influencing output characteristics or mute timing.
• Designed to minimize switching noise and prevent ripple mixing issues when motors start.

Applications

• Radio cassette players

Procurement Notes

Verify the specific package type upon ordering, as the datasheet indicates the BA5415A uses an HSIP-B12 package while the related BA5416 uses a different SIP-M12 package. Confirm that the application design adheres to the recommended operating conditions, specifically ensuring the power supply voltage does not exceed 18.0 V when the standby switch is active. Check absolute maximum ratings for power dissipation limits relative to ambient temperature.

Selection Notes

Select the BA5415A over the BA5416 if a higher maximum supply voltage of 18.0 V is required, as the BA5416 is limited to 15.0 V. Consider the HSIP-B12 package dimensions for PCB layout compatibility. Ensure the load impedance and supply voltage combination stays within the Safe Operating Area (SOA) to prevent device destruction. Verify that the input bias current requirements are accommodated in the source circuit design.

Part Context

The BA5415A belongs to ROHM's line of dual power amplifier ICs designed for consumer audio applications. It shares functional similarities with the BA5416 but differs in packaging and maximum voltage ratings. The device is part of a series offering high-output performance with integrated protection features, targeting cost-sensitive audio systems where heatsink usage is minimized under specific operating conditions.

Replacement Considerations

The BA5416 is a related component with similar electrical characteristics but utilizes a lower-cost package and has a reduced maximum supply voltage limit of 15.0 V compared to the BA5415A's 18.0 V limit. Substitution requires verifying package footprint compatibility and ensuring the system voltage does not exceed the substitute's rating.

FAQ

Does the BA5415A require a heatsink?

A heatsink is not required for the BA5415A when operating with a 9V supply and a load resistance greater than or equal to 4Ω.

How does the standby switch affect the output?

The output is not influenced by the standby pin voltage, allowing the IC to be powered on and off via a switch with low current capacity.

What is the purpose of Pin 7?

Pin 7 is the Filter pin, used for connecting a ripple filter capacitor to increase ripple rejection, though this may affect the starting time.