LM48903TLE/NOPB

Audio Amplifiers Overview

The LM48903TLE/NOPB is a stereo Class D spatial array amplifier manufactured by Texas Instruments. It integrates a proprietary spatial sound processor and an edge rate control (ERC) PWM architecture to enhance audio quality while reducing RF emissions. The device features a flexible I2S interface and a stereo differential-input ADC for analog signal processing. It delivers up to 1.7W per channel into an 8Ω load with less than 10% THD+N. Key electrical specifications include a typical SNR of 90dBA, efficiency of 91%, and PSRR of 69dB at 217Hz. It operates within a supply voltage range of 2.7V to 5.5V and includes short circuit and thermal overload protection.

Audio Amplifiers Feature Summary

• Integrates a proprietary spatial sound processor for enhanced sound staging in portable multimedia devices.
• Features Edge Rate Control (ERC) PWM architecture to significantly reduce RF emissions while preserving audio quality.
• Includes a stereo differential-input ADC capable of processing analog stereo audio signals alongside a flexible I2S interface.
• Provides click and pop suppression to eliminate audible transients during power-up, shutdown, and mode changes.

Audio Amplifiers Applications

• Smart Phones
• Portable Gaming Devices
• Tablets
• Multimedia Devices
• MP3 Player Accessories

Audio Amplifiers Procurement Notes

Verify the specific package marking and date code against the TLA30HHA drawing when inspecting delivered units. Confirm that the digital supply voltage (DVDD) requirements are met, as it differs from the analog and power supplies. Ensure the I2C bus configuration matches the documented write/read sequences and register map before integration.

Audio Amplifiers Selection Notes

Select this component for applications requiring integrated spatial audio processing and low RF interference. Consider the micro SMD package constraints for PCB layout. Evaluate the need for the internal ADC versus external I2S sources based on system complexity. Verify thermal management capabilities given the junction temperature limits and power dissipation characteristics under maximum load conditions.

Audio Amplifiers Part Context

The LM48903 belongs to the Boomer family of audio amplifiers from Texas Instruments. It is designed specifically for portable consumer electronics where space and power efficiency are critical. The device combines high-efficiency Class D output stages with advanced digital signal processing capabilities, distinguishing it from standard mono or stereo amplifiers lacking spatial features.

Audio Amplifiers Replacement Considerations

LM48903TL

Audio Amplifiers FAQ

How is the spatial sound processing engine enabled or disabled?

The spatial engine is controlled via the Filter Control Register (0x500h). Setting PRE_ENABLE and ARRAY_ENABLE bits to 1 enables the engine, while setting them to 0 disables it without affecting memory contents.

What is the maximum operating temperature for the LM48903?

The recommended operating temperature range is from -40°C to +85°C.

Does the device support both analog and digital audio inputs simultaneously?

Yes, the LM48903 features a stereo differential-input ADC for analog signals and a flexible I2S interface for digital audio, allowing flexibility in input source selection.