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LM4951ASD

Name: LM4951ASD
Rating: 4.7 (12 reviews)

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規格

Brand	Texas Instruments
Product Type	Audio Amplifiers
Subcategory	Audio ICs
Packaging	Reel
Supply Voltage - Min	2.7 V
Supply Voltage - Max	9 V
Minimum Operating Temperature	- 40 C
Maximum Operating Temperature	+ 85 C
Height	0.8 mm
Length	4 mm
Operating Supply Voltage	3 V, 5 V
Width	4 mm
Product	Audio Amplifiers
Output Type	1-Channel Mono
Class	Class-AB
Output Power	1.8 W
THD plus Noise	0.07 %
Audio - Load Impedance	8 Ohms
Description/Function	Speaker
Input Type	Single
Output Signal Type	Differential
PSRR - Power Supply Rejection Ratio	66 dB
Supply Type	Single
Shipping Restrictions	Mouser does not presently sell this product in your region.
Package / Case	LLP-10
Factory Pack Quantity:Factory Pack Quantity	1000

概述

Description

The LM4951ASD is a low-power, dual-channel audio amplifier designed for portable and battery-operated devices. It features a Class D architecture, ensuring high efficiency and minimal heat generation, which is ideal for compact applications. This IC supports a wide supply voltage range, typically between 2.7V and 5.5V, allowing it to operate with various power sources.
Key features include high output power, sufficient to drive small speakers or headphones, low total harmonic distortion (THD), and built-in thermal and short-circuit protection mechanisms. The LM4951ASD also includes gain control, enabling users to adjust the amplification level based on application needs.
Due to its compact size and efficient operation, the LM4951ASD is commonly used in smartphones, tablets, portable speakers, and other consumer electronics where space and battery life are critical. Its design allows for easy integration into existing circuits, making it a popular choice among engineers and designers in the audio electronics field.

Features

The LM4951ASD is a low-power audio amplifier designed for portable devices. Key features include:
1. Output Power: Delivers up to 1.5W per channel at 3.6V with less than 1% THD+N, making it suitable for driving small speakers.
2. Low Supply Voltage: Operates efficiently from a supply voltage ranging from 2.0V to 5.5V, enhancing battery life in portable applications.
3. Integrated Functions: Includes an integrated bridge amplifier, allowing for simplified design and reduced component count.
4. Shutdown Mode: Features a low-power shutdown mode to conserve energy when not in use.
5. Thermal Protection: Equipped with thermal shutdown protection, ensuring reliability under high-temperature conditions.
6. Small Package: Offered in a compact surface-mount package, facilitating space-saving designs.
7. Good Sound Quality: Provides a high signal-to-noise ratio (SNR) for clear audio output.
These features make the LM4951ASD ideal for applications in mobile phones, portable speakers, and other compact audio devices.

Package

The LM4951ASD is packaged in a 20-pin TSSOP (Thin Shrink Small Outline Package).

Pinout

The LM4951ASD is a low-power audio amplifier with a total of 20 pins. It is designed for portable devices, providing high-quality sound in a compact package. The main functions of the pins include:
1. Power Supply Pins: Connect to the power source.
2. Input Pins: Receive audio signals from various sources (e.g., microphones or audio processors).
3. Output Pins: Deliver amplified audio signals to speakers or headphones.
4. Control Pins: Allow for functionalities like mute and volume control.
5. Feedback and Ground Pins: Ensure proper feedback for stable operation and provide a common ground reference.
The LM4951ASD is suitable for applications requiring efficient audio amplification with minimal power consumption, making it ideal for battery-powered devices.

Manufacturer

The LM4951ASD is manufactured by Texas Instruments (TI), a global semiconductor company known for designing and producing a wide range of analog and digital electronics components. Texas Instruments specializes in embedded processing and analog solutions, serving diverse sectors such as automotive, industrial, personal electronics, communications, and more. Founded in 1930, TI has a strong reputation for innovation and quality in the electronics industry, providing products that enhance performance and efficiency in various applications.

Application

The LM4951ASD is a low-power audio amplifier primarily used in portable devices such as mobile phones, tablets, and laptops. It serves in applications requiring high-quality audio output, such as multimedia and communication devices. Additionally, it is suitable for personal audio systems, television sets, and portable speakers, where efficient audio amplification is crucial.

Equivalent

The LM4951ASD is a low-power audio amplifier. Equivalent products include the LM4864, LM4831, and TPA2005D1 from Texas Instruments. Other alternatives are the MAX9744 from Maxim Integrated and the PAM8403 from PAM. When selecting a replacement, ensure to consider parameters like output power, supply voltage, and package type for compatibility.