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LM4890IBPX
Product Overview
Category: Integrated Circuit (IC)
Use: Audio amplifier
Characteristics: - Small size and low power consumption - High audio quality with low distortion - Wide voltage range for compatibility with various devices - Built-in thermal shutdown protection - Suitable for portable electronic devices
Package: BGA (Ball Grid Array)
Essence: The LM4890IBPX is a high-performance audio amplifier IC designed for portable electronic devices. It provides excellent audio quality while consuming minimal power, making it ideal for applications where space and battery life are critical.
Packaging/Quantity: The LM4890IBPX is available in a BGA package. The quantity per package may vary depending on the manufacturer.
Specifications
- Supply Voltage Range: 2.7V to 5.5V
- Output Power: Up to 1.1W
- Total Harmonic Distortion + Noise (THD+N): 0.1% (typical)
- Shutdown Current: 0.01µA (typical)
- Operating Temperature Range: -40°C to 85°C
Pin Configuration
The LM4890IBPX has a total of 16 pins. The detailed pin configuration is as follows:
- VDD: Positive supply voltage
- GND: Ground reference
- SD: Shutdown control input
- INL-: Negative input for left channel
- INL+: Positive input for left channel
- BYP: Bypass capacitor connection
- OUTL: Left channel output
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- INR-: Negative input for right channel
- INR+: Positive input for right channel
- OUTR: Right channel output
- VDD: Positive supply voltage
- GND: Ground reference
Functional Features
- Low quiescent current for power efficiency
- Thermal shutdown protection prevents overheating
- Short-circuit and overcurrent protection
- Pop and click suppression during power-on/off transitions
- External gain configuration for flexibility in different applications
Advantages and Disadvantages
Advantages: - High audio quality with low distortion - Small size and low power consumption - Wide voltage range for compatibility - Built-in thermal shutdown protection
Disadvantages: - Limited output power compared to larger amplifiers - BGA package may require specialized equipment for soldering
Working Principles
The LM4890IBPX is a class AB audio amplifier that amplifies the input audio signal while maintaining low distortion. It operates by receiving the audio input through the left and right channels, amplifying the signals separately, and then combining them to produce the amplified audio output.
The amplifier utilizes internal feedback mechanisms to ensure stability and minimize distortion. It also incorporates various protection features to safeguard against short circuits, overcurrent, and thermal issues.
Detailed Application Field Plans
The LM4890IBPX is commonly used in portable electronic devices such as smartphones, tablets, portable media players, and Bluetooth speakers. Its small size, low power consumption, and high audio quality make it suitable for these applications where space and battery life are crucial.
Alternative Models
- LM4863: Similar audio amplifier IC with higher output power
- TPA3116D2: Class D audio amplifier with higher efficiency
- MAX98357A: Audio amplifier IC with integrated digital audio interface
These alternative models offer different features and specifications, providing options for various application requirements.
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Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng LM4890IBPX trong giải pháp kỹ thuật
Sure! Here are 10 common questions and answers related to the application of LM4890IBPX in technical solutions:
Q: What is LM4890IBPX? A: LM4890IBPX is a stereo audio amplifier integrated circuit (IC) designed for use in portable devices such as smartphones, tablets, and portable media players.
Q: What is the maximum output power of LM4890IBPX? A: The maximum output power of LM4890IBPX is typically around 1.1 Watts per channel into an 8-ohm load with a 5V power supply.
Q: Can LM4890IBPX operate on a single power supply? A: Yes, LM4890IBPX can operate on a single power supply ranging from 2.7V to 5.5V, making it suitable for battery-powered applications.
Q: Does LM4890IBPX require any external components? A: Yes, LM4890IBPX requires a few external components such as input coupling capacitors, feedback resistors, and output coupling capacitors for proper operation.
Q: What is the typical gain range of LM4890IBPX? A: The typical gain range of LM4890IBPX is adjustable from 20dB to 30dB using external resistors.
Q: Can LM4890IBPX drive low-impedance headphones? A: Yes, LM4890IBPX can drive low-impedance headphones down to 16 ohms, making it suitable for various headphone applications.
Q: Is LM4890IBPX capable of driving speakers directly? A: Yes, LM4890IBPX can drive small speakers directly, but it is recommended to use an output coupling capacitor for DC blocking.
Q: Does LM4890IBPX have any built-in protection features? A: Yes, LM4890IBPX includes built-in thermal shutdown and short-circuit protection to prevent damage to the IC and connected components.
Q: Can LM4890IBPX be used in bridge-tied load (BTL) configuration? A: No, LM4890IBPX is not designed for bridge-tied load (BTL) operation. It is intended for single-ended stereo applications.
Q: What is the package type of LM4890IBPX? A: LM4890IBPX is available in a small 16-pin WQFN package, which is suitable for space-constrained applications.
Please note that these answers are general and may vary depending on the specific application and circuit design considerations.