LM48901SQX/NOPB Allicdata Electronics
Allicdata Part #:

LM48901SQX/NOPB-ND

Manufacturer Part#:

LM48901SQX/NOPB

Price: $ 0.00
Product Category:

Integrated Circuits (ICs)

Manufacturer: Texas Instruments
Short Description: IC AMP AUDIO 2.8W D QUAD 32WQFN
More Detail: Amplifier IC 4-Channel (Quad) Class D 32-WQFN (5x5...
DataSheet: LM48901SQX/NOPB datasheetLM48901SQX/NOPB Datasheet/PDF
Quantity: 1000
Stock 1000Can Ship Immediately
Specifications
Series: Boomer®, PowerWise®
Packaging: Tape & Reel (TR) 
Part Status: Active
Type: Class D
Output Type: 4-Channel (Quad)
Max Output Power x Channels @ Load: 2.8W x 4 @ 4 Ohm
Voltage - Supply: 2.7 V ~ 5.5 V
Features: Depop, Differential Inputs, I²C, I²S, Short-Circuit and Thermal Protection, Shutdown
Mounting Type: Surface Mount
Operating Temperature: -40°C ~ 85°C (TA)
Supplier Device Package: 32-WQFN (5x5)
Package / Case: 32-WFQFN Exposed Pad
Base Part Number: LM48901
Description

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LM48901SQX/NOPB Application Field and Working Principle

Introduction

LM48901SQX/NOPB (hereinafter referred to as “This component”) is a low voltage, low power, dual-channel audio amplifier designed for consumer audio applications. It belongs to the broad category of linear - amplifiers - audio products. It is an efficient, cost-effective choice for products such as portable and consumer products. This component integrates temperature protection, shutdown mode and signal distortion detection circuit, and supports multiple protection configurations, providing protection functions such as over-temperature protection, output short circuit and pop noise. This component can work stably in low voltage and low power environment.

Application Field:

This component is a versatile audio amplifier solution with high efficiency, low power consumption and high performance. Therefore, it is widely used in all kinds of consumer audio devices. This component is particularly suitable for products with strict requirements for audio quality, such as portable multimedia products, head mounted displays, multimedia speakers, gaming consoles, TV sets, car audio systems and other consumer audio devices.

Working Principle:

This component is an audio amplifier solution integrated with dual-channel GBL-emitter complementary input and BTL output structure. Its core consists of BTL output transistors, input transistors, current-limiting offset elimination circuit, temperature protection circuit, output short circuit protection circuit, distortion detection circuit and shutdown mode circuit. The working principle of this component can be divided into four parts: dual-channel input, BTL output, protection circuit and shutdown mode.

Dual-Channel Input

This component has two input channels, which can be connected to two audio signals respectively. The two signals will pass through two input transistors and generate two corresponding output signals. Two input transistors use complementary symmetry to reduce distortion effectively. The two input signals can be combined by combining the outputs of the two transistors. This component is equipped with a current limiting offset elimination circuit to ensure the reliability of the input signal and the output accuracy of the power amplifier.

BTL Output

The output stage of This component is designed with BTL output structure to ensure efficient and stable output. The BTL output has the characteristics of big output power and low heat generation. The output transistor adopts the emitter follower structure, which can reduce the terminal resistance, improve the high frequency scan performance of the audio signal, and ensure the high fidelity effect. Moreover, the supply voltage can be selected flexibly according to the actual needs of the product.

Protection Circuit

This component also integrates multiple functions of temperature protection, output short circuit protection and pop noise protection. The temperature protection circuit is designed to detect the junction temperature of the device and shut down the output when the temperature exceeds the rated temperature. The output short circuit protection circuit is designed to detect the output short circuit status in real time, and protect the device from damage when the short circuit occurs. The pop noise protection circuit is designed to detect the pop noise generated when the power supply is turned on and off, and avoid the harm to the human ear caused by the sudden increase of sound.

Shutdown Mode

This component is also equipped with a shutdown mode circuit. When the shutdown pin is pulled low, the output of the power amplifier will be shut down completely and no output will be generated. This mode is suitable for portable devices that need to be powered on and off regularly. When in shutdown state, the power consumption of the device can be reduced to less than 1uA, so that the power consumption of the product can be saved and the battery life can be extended.

Conclusion

This LM48901SQX/NOPB component is designed for consumer audio applications such as portable multimedia products, head mounted displays, multimedia speakers, gaming consoles and TV sets. Its working principle is mainly composed of dual-channel input, BTL output, protection circuit and shutdown mode. This component can work stably in low voltage and low power environment, and its temperature protection, output short circuit protection and pop noise protection functions can effectively protect products from damage. It is widely used in all kinds of consumer audio devices.

The specific data is subject to PDF, and the above content is for reference

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