LM4890LD/NOPB
Product Overview
Category
LM4890LD/NOPB belongs to the category of audio power amplifiers.
Use
It is used to amplify audio signals and drive speakers in various electronic devices such as mobile phones, tablets, portable media players, and other portable electronic devices.
Characteristics
- Low voltage operation
- Low quiescent current
- Fixed gain of 20dB
- Thermal shutdown protection
- Short-circuit and thermal protection
Package
The LM4890LD/NOPB comes in a small outline package (SOIC) for easy integration into electronic circuits.
Packaging/Quantity
The LM4890LD/NOPB is typically packaged in reels with a quantity of 2500 units per reel.
Specifications
- Operating Voltage: 2.7V to 5.5V
- Quiescent Current: 4mA
- Output Power: 1W at 5V, 10% THD+N, RL = 8Ω
- Shutdown Current: 0.6μA
- Gain: 20dB
Detailed Pin Configuration
The LM4890LD/NOPB has a total of 8 pins: 1. VDD - Power supply input 2. SHUTDOWN - Shutdown control input 3. IN- - Negative audio input 4. IN+ - Positive audio input 5. GND - Ground 6. BYPASS - Bypass pin for internal charge pump 7. OUT+ - Positive speaker output 8. OUT- - Negative speaker output
Functional Features
- Low voltage operation allows for use in battery-powered devices
- Fixed gain simplifies design and reduces external components
- Thermal shutdown and short-circuit protection ensure device safety and reliability
Advantages and Disadvantages
Advantages
- Low quiescent current for power efficiency
- Small package size for space-constrained designs
- Thermal and short-circuit protection for enhanced reliability
Disadvantages
- Limited output power compared to higher wattage amplifiers
- Fixed gain may not be suitable for all applications requiring variable gain
Working Principles
The LM4890LD/NOPB operates by amplifying the input audio signal using an internal amplifier circuit and then driving the output to the connected speaker. The low voltage operation and fixed gain simplify the design and make it suitable for portable electronic devices.
Detailed Application Field Plans
The LM4890LD/NOPB is ideal for use in portable electronic devices such as: - Mobile phones - Tablets - Portable media players - Handheld gaming devices
Detailed and Complete Alternative Models
Some alternative models to LM4890LD/NOPB include: - LM4863 - LM4871 - TPA2012
In conclusion, the LM4890LD/NOPB is a versatile audio power amplifier designed for low voltage operation and is well-suited for use in portable electronic devices where space and power efficiency are critical factors.
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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av LM4890LD/NOPB i tekniska lösningar
What is the LM4890LD/NOPB?
- The LM4890LD/NOPB is a mono, bridge-tied load (BTL) audio power amplifier with DC volume control.
What is the typical application of LM4890LD/NOPB?
- It is commonly used in portable audio devices, such as smartphones, tablets, and portable gaming systems.
What is the maximum output power of LM4890LD/NOPB?
- The LM4890LD/NOPB can deliver up to 1.1W of continuous average power into an 8Ω BTL load.
What is the supply voltage range for LM4890LD/NOPB?
- The supply voltage range is typically between 2.7V and 5.5V.
How does the DC volume control work in LM4890LD/NOPB?
- The DC volume control allows for smooth and accurate volume adjustment without pops or clicks.
What are the key features of LM4890LD/NOPB?
- Some key features include low quiescent current, shutdown mode, and thermal shutdown protection.
What is the recommended input signal level for LM4890LD/NOPB?
- The recommended input signal level is 300mVrms for maximum output power.
Can LM4890LD/NOPB be used in battery-powered applications?
- Yes, it is suitable for battery-powered applications due to its low supply voltage requirement.
Does LM4890LD/NOPB require external compensation?
- No, it has internal compensation for stability and robust performance.
Is LM4890LD/NOPB available in a small package for space-constrained designs?
- Yes, it is available in a small 8-pin WSON package, making it suitable for compact designs.