带有3D环绕和低音增强的125mW免输出耦合电容 立体声线路驱动器/耳机放大器
HT97230为差分输入、可直接输出的线路驱动器/耳机放大器。5V供电时,器件为1kΩ负载提供3VRMS输出驱动;3.3V供电时,为600Ω负载提供2VRMS输出驱动。5V供电时,器件为32Ω耳机负载提供125mW驱动。IC具有6dB内部固定增益,也可利用外部电阻设置增益(目前仅提供外部电阻设置增益版本,其他版本需预定)。IC在整个音频频带内提供优异的THD+N。
HT97230有两个不同开启时间(tON)版本,版本A、C和E的导通时间tON为5.5ms,用于耳机驱动;B和D则具有130ms的tON,用于机顶盒设计(目前仅提供A版本,其他版本需预定)。内部电荷泵对输入电源反相,产生负电源。放大器的输出级由输入正电源和电荷泵输出负电源供电,双极性供电使得输出偏置在零电位,省去了大尺寸、容易引入失真的输出耦合电容。ICSD开关时没有咔嗒/噼噗声。
HT97230具有3D环绕模式,能够在立体声耳机上创造3D环绕声的感觉。HT97220还有具有低音增强模式,可依据耳机频响特性,对某个频段的低音进行不同程度的提升增强,达到低音增强的效果。
HT97230提供无铅无卤QFN24L-PP封装,提供QFN20L-PP封装的定制需求。
3D环绕可调
低音增强可调
耳机输出无需隔直电容,节省空间和成本,并保证完整低音
卓越的低频保真度
业界首次消除开关SD的click-pop声
非凡的失真水平,THD+N最低至0.001%
出众的噪声信噪比,VN: 7uV, SNR:112dB
支持全差分输入和单端输入
输出能力:125mW (fIN = 1kHz, VDD=5V, RL=32Ω, THD+N=1%);
3Vrms (fIN = 1kHz, VDD=5V, RL=1kΩ, THD+N<0.1%);
2Vrms (fIN = 1kHz, VDD=5V, RL=600Ω, THD+N<0.1%);
极度精简外围,QFN24L-PP 4mm*4mm封装
蓝牙耳机
智能手机
音响,DVD
平板/笔记本电脑
机顶盒
便携式游戏机
PIN | NAME | FUNCTION |
1 | PVDD | Charge-Pump Power-Supply Input. Bypass to PGND with 1uF. |
2 | C1P | Positive Flying Capacitor Connection. Connect a 1uF capacitor between C1P and C1N. |
3 | PGND | Power Ground. Connect PGND and SGND together at the system ground plane. |
4 | C1N | Negative Flying Capacitor Connection. Connect a 1uF capacitor between C1P and C1N. |
5 | PVSS | Negative Charge-Pump Output. Bypass to PGND with 1uF. |
6 | SGND | Signal Ground. Connect PGND and SGND, SGND1 together at the system ground plane. |
7 | SGND1 | Signal Ground. Connect PGND and SGND, SGND1 together at the system ground plane. |
8 | D3R | 3D control pin. |
9 | INRNF | Right channel feedback. |
10 | BASSR | Right channel Bass control output. |
11 | INR+ | Right Positive Polarity Input |
12 | INR- | Right Negative Polarity Input |
13 | SVDD2 /TEST | Signal Path Power-Supply Input. Bypass to PGND with 1uF. Connect directly to PVDD. |
14 | OUTR | Right Direct Drive Output |
15 | BIAS | Internal Supply Node. Bypass to PGND with 0.1uF. |
16 | OUTL | Left Direct Drive Output |
17 | CTL | 3D and Bass function control. |
18 | SVDD | Signal Path Power-Supply Input. Bypass to PGND with 1uF. Connect directly to PVDD. |
19 | INL- | Left Negative Polarity Input |
20 | INL+ | Left Positive Polarity Input |
21 | BASSL | Left channel Bass control output. |
22 | INLNF | Left channel feedback. |
23 | D3L | 3D control pin. |
24 | N_SHDN | Active-Low Shutdown. Drive N_SHDN high for normal operation. |
EP | Exposed Pad. Connect at the system ground plane. |
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