Datasheet > AK7841

AK7841

更新时间： 2024-09-21 06:36:55

品牌	Logo	应用领域
AKM		放大器
页数	文件大小	规格书
21页	470K
描述
Monaural Audio Class-D Amp with Power Booster for PiezoSpeaker

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AK7841 数据手册

ASAHI KASEI

[AK7841]

AK7841

Monaural Audio Class-D Amp with Power Booster for

PiezoSpeaker

GENERAL DESCRIPTION

The AK7841 is a Monaural Class-D amplifier for driving Piezo-Electric Speakers. Its built-in power boost

DCDC converter generates adequate high voltage for driving Piezo Speaker from a Li-Ion battery.

Output filter-less solution eliminates post LC-filters, which are normally required at Class-D outputs, and

contributes to total space savings. Class-D operation ensures higher power efficiency. The AK7841 is

the most appropriate for Cellular Phones with a piezo speaker.

FEATURES

□ Class-D Amplifier :

• Piezo-Electric Speaker Driver

• Analog Monaural signal input for both single and Differential-ended

• Monaural BTL output

• Output voltage = 12Vpp @VDD1=8.75V

• Filter-less solution

• Pop noise free architecture during power up or down.

• Output short protection

□ Boost DCDC Converter ：

• Input voltage = 2.7V ∼ 4.5V Æ Output voltage = 8.75V

• Over-current protection

• Over-voltage protection

□Control function ：

• Pre-gain amplifier

• Power-own control

−3dB ∼ +18dB, 3dB step.

Controlled by pin setting.

• Over-temperature protection

□Operational voltage ：VBAT=2.7V ∼ 4.5V、DVDDI=1.65V ∼ 4.5V

□Operational temperature： −30°C ∼ 85°C

□Package： 24pin WL-CSP (2.5mm × 2.5mm, 0.5mm pitch)

Rev.08

2008/3

- 1 -

12 3 4 5 6 7...21

中文翻译

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