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HT97230
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。

价格:¥ 库存99999
数量:
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特点

  • 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

应用

  • 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

引脚定义

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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