LM4561, LM4562 constitute 170W power amplifier circuit diagram and related introduction

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Power amplifier, referred to as "power amplifier". In many cases, the rated output power of the host is not up to the task of driving the entire audio system. At this time, a power amplifier is added between the host and the playback device to supplement the required power gap, and the power The amplifier plays a pivotal role of "organization, coordination" in the entire sound system, and to some extent dominates whether the entire system can provide good sound quality output.
The circuit shown in Figure (a) is an amplifier circuit that outputs 170W under a 4Ω load; the LM4651 is a pre-stage circuit of a Class D amplifier, which is packaged in a 28-pin DIP, and its internal equivalent circuit is shown in Figure (c);