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本文提出了一种460W的Class-D输出级，采用自适应栅极驱动技术，以应对消费电子市场对更高输出功率的需求。该设计解决了在高电压和电流下保持高效率与可靠性的问题。
many consumer applications such as television and home-theatre systems. The high efficiency of Class-D amplifiers allows for providing a very high output power with a modest heat sinking. The audio amplifier market has a tendency towards ever higher output power [1-3]. Consequently, Class-D output stages are required to operate at ever higher voltage and current levels. A typical Class-D output stage consists of two n-type power MOSFETs in a totem-pole configuration as shown in Fig. 26.6.1. The output node VOUT is switched between the supply lines using pulse-width modulation (PWM). An external LC-lowpass filter reconstructs the audio signal on the loudspeaker terminal. The gates of the power MOSFETs MH and ML are driven by inverters MPH/NH and MPL/NL. The low-side gate driver uses an externally decoupled supply VREG. The high-side gate driver is supplied from an external bootstrap capacitor CBOOT. The sizing of the inverters together with gate-drain capacitances CGDH/GDL of the power
NXP Semiconductors, Nijmegen, Netherlands, Class-D amplifiers have largely replaced conventional Class-AB amplifiers in