LM4817MHX/NOPB

Series:	Boomer®
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Class AB
Output Type:	2-Channel (Stereo)
Max Output Power x Channels @ Load:	1.5W x 2 @ 8 Ohm
Voltage - Supply:	3 V ~ 5.5 V
Features:	Depop, Shutdown, Thermal Protection
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	28-HTSSOP
Package / Case:	28-TSSOP (0.173", 4.40mm Width) Exposed Pad
Base Part Number:	LM4817

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LM4817MHX/NOPB is an audio amplifiers designed, manufactured, and distributed by Texas Instruments Inc.[1] LM4817MHX/NOPB amplifies low-level, single-ended audio signals to generate higher power levels with good power efficiency and low distortion. This device can be used in various applications, such as portable audio, portable sound systems, mobile audio, and multimedia systems.The LM4817MHX/NOPB uses a DirectDrive, DC-coupled ClassG amplifier architecture to deliver a high output power with low distortion, good power efficiency, and low quiescent current. The device has an instruction sheet which effectively outlines the working principle and design features of the LM4817MHX/NOPB.The LM4817MHX/NOPB is designed to accept a low-level, single-ended audio signal ranging from 0.9Vpp to 4Vpp and outputting a +7.5 dBm peak power with an 8Ω load. The device has an internal input bias network that allows the user to set the DC voltage to avoid overloading the device\'s input stage and produce the desired output power. The device also has a shutdown feature that can be used to reduce the quiescent current consumption and save battery power.The LM4817MHX/NOPB is a monaural ClassG audio amplifier, which means it has two separate amplifier paths that are connected together through a common gain stage. The device can operate in two mode: the single-ended mode and the bridged-mode. In single-ended mode, the LM4817MHX/NOPB amplifies the input audio signal and produces one output channel. In bridged mode, the device amplifies the input audio signal and produces two output channels, each with a load of four ohms.The ClassG topology of the LM4817MHX/NOPB ensures that the device delivers a high output power with low distortion. The device has two independent gain stages to achieve this. The first gain stage is the output stage, which is followed by the second gain stage, the auxiliary gain stage. The first gain stage amplifies the input signal, while the auxiliary gain stage sets the output power level. The device has adjustable gains on the auxiliary stage to facilitate the user in setting the output power level. In addition to providing a high output power, low distortion, and good power efficiency, the LM4817MHX/NOPB also has several other features to ensure smooth operation. The device has built-in short-to-ground and short-to-battery protection that ensure safe operation. It also has a power-on reset circuit for ensuring proper initialization and protection of the device.The LM4817MHX/NOPB is designed to deliver high fidelity, low distortion audio amplification by utilizing the DC-coupled ClassG amplifier architecture. This device is suitable for single-ended audio signal input and is ideal for a wide range of applications including portable audio, portable sound systems, mobile audio, and multimedia systems.

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