LM48557UR/NOPB

Audio Amplifiers Overview

The LM48557UR/NOPB is a mono, analog input ceramic speaker driver featuring an integrated charge pump and I2C volume control. It operates on a single supply voltage ranging from 1.7 V to 4.5 V. The device utilizes a Class AB output stage with a bridge-tied load configuration to drive ceramic speakers. Key electrical parameters include a maximum output power of 1.3 W into a 22-ohm load at 4.5 V. The unit is housed in a 16-pin DSBGA package.

Audio Amplifiers Feature Summary

• Integrated I2C interface for digital volume adjustment and system reset control
• Built-in charge pump eliminates the need for external inductors or capacitors for high-side drive
• Class AB topology provides high efficiency and low total harmonic distortion for audio applications

Audio Amplifiers Applications

• Portable cell phones and mobile communication devices
• Personal media players and portable audio systems
• Handheld gaming consoles and similar battery-powered electronics

Audio Amplifiers Procurement Notes

Verify the specific suffix UR against the manufacturer's current datasheet to confirm pinout compatibility and package dimensions. Ensure that the I2C address settings align with your system design requirements. Confirm RoHS compliance status through official Texas Instruments documentation before finalizing procurement orders.

Audio Amplifiers Selection Notes

Select this component when a compact mono audio solution with digital control is required. It is suitable for designs where space constraints prohibit discrete charge pump circuits. Consider the 16-pin DSBGA package for surface-mount assembly. Evaluate thermal performance based on the expected output power and ambient operating conditions.

Audio Amplifiers Part Context

This part belongs to the LM48557 family of Boomer audio amplifiers. It shares functional similarities with other TI ceramic speaker drivers but is distinguished by its specific integration of I2C controls and the UR package variant. The NOPB suffix indicates lead-free construction and environmental compliance.

Audio Amplifiers Replacement Considerations

Check for direct substitutes such as the LM48557TL/NOPB, which offers the same functionality in a USMD package. Verify pin-to-pin compatibility and electrical specifications before swapping packages. Consult the manufacturer's cross-reference guide for validated alternative components.