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LM4991LD/NOPB

Name: LM4991LD/NOPB
Rating: 4.7 (12 reviews)

IC AMP CLASS AB MONO 3W 8WSON

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包 WSON (NGN)-8
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規格

Package	Tape & Reel (TR),Cut Tape (CT)
Series	Boomer®
ProductStatus	Active
Type	Class AB
OutputType	1-Channel (Mono)
MaxOutputPowerxChannels@Load	3W x 1 @ 3Ohm
Voltage-Supply	2.2V ~ 5.5V
Features	Depop, Shutdown, Thermal Protection
MountingType	Surface Mount
OperatingTemperature	-40°C ~ 85°C (TA)
SupplierDevicePackage	8-WSON (4x4)

概述

Description

The LM4991LD/NOPB is a dual-channel, low-power audio amplifier designed for portable audio applications. It is capable of driving high-efficiency speakers with a maximum output power of 1.5 W per channel. The device features a low total harmonic distortion (THD) and high signal-to-noise ratio (SNR), ensuring high-quality audio performance.
Key features include a wide power supply range of 2.5 V to 5.5 V, making it suitable for battery-operated devices. The LM4991 also incorporates a shutdown mode to conserve power when not in use. The amplifier's architecture emphasizes efficiency, reducing the need for heatsinks and extending battery life.
Applications include portable speakers, mobile phones, and other battery-powered audio devices. The package is compact, easing integration into space-constrained designs. With its combination of performance, efficiency, and versatility, the LM4991LD/NOPB is a popular choice for designers looking to enhance audio output in portable electronics.

Features

The LM4991LD/NOPB is a highly efficient audio amplifier designed for portable applications. Key features include:
1. Dual-Channel Output: It provides stereo amplification with a bridge-tied load configuration.
2. High Efficiency: With up to 85% efficiency, it minimizes heat generation, making it suitable for battery-powered devices.
3. Low Distortion: The amplifier offers low total harmonic distortion (THD), ensuring high-quality audio output.
4. Wide Supply Voltage Range: Operates from 2.5V to 5.5V, allowing flexibility in various applications.
5. Integrated Pop-and-Click Suppression: Reduces audible noise during power-up and power-down cycles.
6. Thermal Protection: Includes features to prevent overheating, enhancing reliability.
7. Small Package Size: Available in an LLP (Leadless Leadframe Package), facilitating compact designs.
These features make the LM4991LD/NOPB ideal for portable electronics such as smartphones, tablets, and other battery-operated audio devices.

Package

The LM4991LD/NOPB is packaged in a 5-pin SOT-23 (Thin SOT) package type.

Pinout

The LM4991LD/NOPB is a low-power audio amplifier with a total of 8 pins. Its primary functions include driving speakers in portable devices and providing high-quality audio amplification. The pin configuration is as follows:
1. GND: Ground connection.
2. OUT: Output to the speaker or load.
3. VDD: Supply voltage input.
4. IN+: Positive input for audio signal.
5. IN-: Negative input for audio signal.
6. CSN: Chip select, used for enabling/disabling the device.
7. MUTE: Mute control input.
8. NC: No connect; not used in the circuit.
The LM4991LD/NOPB features low distortion and high efficiency, making it suitable for battery-powered applications.

Manufacturer

The manufacturer of the LM4991LD/NOPB is Texas Instruments (TI). Texas Instruments is a global semiconductor company that designs and manufactures a wide range of analog and digital integrated circuits (ICs). Founded in 1930, TI is known for its innovation in the field of electronics, producing products for various applications, including automotive, communications, consumer electronics, and industrial systems. The LM4991LD/NOPB is an audio amplifier integrated circuit, commonly used in portable devices. Texas Instruments is recognized for its commitment to quality and technology leadership in the semiconductor industry.

Application

The LM4991LD/NOPB is a low-power, single-supply audio amplifier primarily used in portable electronic devices, such as smartphones, tablets, and portable speakers. It is suitable for driving headphones or small speakers, offering high efficiency and low distortion. Other applications include televisions, computer audio systems, and any consumer electronics requiring compact audio amplification solutions.

Equivalent

The LM4991LD/NOPB is an audio amplifier chip. Equivalent products include the LM4910, LM4911, and LM4912 from Texas Instruments, which offer similar functionalities in audio amplification. Other alternatives may include products from manufacturers like TDA7056 from NXP or MAX9744 from Maxim Integrated, depending on specific application requirements such as power output and packaging. Always check the datasheets for precise specifications and compatibility.