DatasheetsPDF.com

AK7841

Asahi Kasei Microsystems
Part Number AK7841
Manufacturer Asahi Kasei Microsystems
Description Monaural Audio Class-D Amp
Published Aug 27, 2010
Detailed Description ASAHI KASEI [AK7841] www.DataSheet4U.com Monaural Audio Class-D Amp with Power Booster for PiezoSpeaker GENERAL DESCRI...
Datasheet PDF File AK7841 PDF File

AK7841
AK7841


Overview
ASAHI KASEI [AK7841] www.
DataSheet4U.
com 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 −3dB ∼ +18dB, 3dB step.
• Power-own control • Over-temperature protection Controlled by pin setting.
AK7841 □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 -1- 2008/3 ASAHI KASEI [AK7841] www.
DataSheet4U.
com BLOCK DIAGRAM DVDDI PDN VBAT PD C ont Pow er Booster VCO IL VFB ERRO VSS2 PG 0 PG 1 PG 2 Gain C ontrol VDD1 INN INP Pre AM P -3dB ∼ +18dB 3dB step C lass-D AM P VCN VCP VSS1 SDSEL +16dB VC VSS3 VREF Figure.
1 Block Diagram Rev.
08 -2- 2008/3 ASAHI KASEI [AK7841] www.
DataSheet4U.
com PIN ASSIGNMENT 5 4 3 2 1 E D C B A < Top View > E D C B A 5 NC VCOIL ERRO PG2 NC 4 VFB VSS2 VBAT PG0 PG1 3 2 VDD1 VCP SDSEL VCN NC VSS3 PDN INN DVDDI Figure.
2 Pin assignment 1 NC VSS1 VC INP NC Rev.
08 -3- 2008/3 ASAHI KASEI [AK7841] www.
DataSheet4U.
com Pin / FUNCTION No.
A1 A2...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)