HT8691主要特性如下：

・免滤波数字调制，直接驱动扬声器

・输出功率

5.5W (VBAT=4.2V, PVDD = 6.5V, RL=4Ω, THD+N=10%)

7.0W (VBAT=4.2V, PVDD = 7.0V, RL=3Ω, THD+N=10%)

3.0W (VBAT=4.2V, PVDD = 6.5V, RL=8Ω, THD+N=10%)

・电源

-Boost Input VBAT：2.5V to 5.5V

-Boost Output PVDD：VBAT to 7.0V

・BOOST 输出电压可调

・Class AB / Class D可切换

・过流/过热/欠压异常保护

・无铅封装 , SOP8L-PP