Overview
The Texas Instruments LM4995SD/NOPB is a 1.3-W, stereo, analog input Class-AB audio amplifier designed for demanding applications in mobile and portable communication devices. This amplifier is available in a WSON (NGQ) package with 8 pins and features depop, shutdown, and thermal protection. It is suitable for use in a variety of portable audio systems where low power consumption and high audio quality are essential.
Key Specifications
| Parameter | Conditions | Typical | Limit |
|---|---|---|---|
| Quiescent Power Supply Current (IDD) | VIN = 0V, Io = 0A, No Load, VDD = 5V | 1.5 mA | 2.5 mA (max) |
| Shutdown Current (ISD) | VSD = VGND | 0.01 µA | 1 µA (max) |
| Output Offset Voltage (VOS) | No Load | 5 mV | 26 mV (max) |
| Output Power (Po) | THD+N = 1% (max); f = 1 kHz, VDD = 5V | 1.25 W | 1.3 W (TM) |
| Wake-up Time (TWU) | VDD = 5V | 165 ms | |
| Supply Voltage Range | 2.4V ~ 5.5V | ||
| Total Harmonic Distortion + Noise (THD+N) | Po = 300mWRMS; f = 1kHz, VDD = 5V | 0.07% |
Key Features
- Class-AB audio amplifier with high efficiency and low power consumption.
- Depop protection to prevent loud speaker clicks during power on/off.
- Shutdown and thermal protection features for enhanced reliability.
- Low quiescent current and low shutdown current for battery-powered devices.
- High-quality audio output with low total harmonic distortion + noise (THD+N).
- Compact WSON (NGQ) package with 8 pins.
Applications
The LM4995SD/NOPB is designed for use in various portable audio systems, including mobile phones, MP3 players, and other handheld communication devices. It is also suitable for use in battery-powered speakers, headphones, and other audio equipment where low power consumption and high audio quality are critical.
Q & A
- What is the maximum output power of the LM4995SD/NOPB?
The maximum output power is 1.25 W per channel at an 8Ω load with a THD+N of 1% at 1 kHz. - What is the supply voltage range for the LM4995SD/NOPB?
The supply voltage range is from 2.4V to 5.5V. - What are the key protection features of the LM4995SD/NOPB?
The key protection features include depop protection, shutdown, and thermal protection. - What is the typical quiescent power supply current of the LM4995SD/NOPB?
The typical quiescent power supply current is 1.5 mA at VDD = 5V with no load. - What is the wake-up time for the LM4995SD/NOPB?
The wake-up time is typically 165 ms at VDD = 5V. - What is the total harmonic distortion + noise (THD+N) of the LM4995SD/NOPB?
The THD+N is typically 0.07% at Po = 300mWRMS and f = 1kHz. - In what package is the LM4995SD/NOPB available?
The LM4995SD/NOPB is available in a WSON (NGQ) package with 8 pins. - What are some common applications for the LM4995SD/NOPB?
Common applications include mobile phones, MP3 players, handheld communication devices, battery-powered speakers, and headphones. - How does the LM4995SD/NOPB manage thermal issues?
The LM4995SD/NOPB features thermal protection to prevent overheating and ensure reliable operation. - What is the shutdown current of the LM4995SD/NOPB?
The shutdown current is typically 0.01 µA when VSD = VGND.
