LM4890LD/NOPB

Product Overview

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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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van LM4890LD/NOPB in technische oplossingen

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.