D 类放大器又可称数字式功率放大，基本架构如图 2 所示，输入讯号经由脉波宽度调变器(Pulse Width Modulation)将音频信号调制成数字信号后，由功率晶体管(Q1,Q2)放大输出，再经由低通滤波器(Lf,Cf)取出原输入端的音频讯号送至喇叭输出。
IRS2092引脚图：
IRS2092管脚功能定义：
IRS2092应用电路图：
IRS2092框图：
Note 1: Logic operational for Vs equal to –5 V to +200 V. Logic state held for Vs equal to –5 V to –VBS.
Note 2: Nominal voltage for VREF is 5.1 V. IOREF of 0.3 – 0.8 mA dictates total external resistor value on VREF to be 6.3 kΩ to
16.7 kΩ.
Note 3: GND input voltage is limited by IAAZ and ISSZ.
Note 4: VSS ramps up from 0 V to 200 V.
Note 5: Output logic status may not respond correctly if input pulse width is smaller than the minimum pulse width.
