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PDF AK7846 Data sheet ( Hoja de datos )
| Número de pieza | AK7846 | |
| Descripción | Stereo Audio Class-D Amp | |
| Fabricantes | Asahi Kasei Microsystems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AK7846 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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AKEMDAKEMD CONFIDENTIAL
ww[wA.DKa7ta8S4he6e]t4U.com
AK7846
Stereo Audio Class-D Amp with Power Booster for Piezo
Speakers
GENERAL DESCRIPTION
THE AK7846 is Stereo Class-D amplifier for driving Piezo-Electric Speakers. Built-in Boost DCDC
converter generates adequate high voltage for driving Piezo Speakers from Li-Ion battery.
AKM state-of-the-art filter-less solution eliminates LC-filters, which are normally required at Class-D
outputs. That contributes to total space saving. Class-D operation ensures higher power efficiency,
and couple with Piezo Speaker that is low-power- consumption and low-profile figure. The AK7846 is
very applicable for cellular phones with piezo speakers.
FEATURES
□ Class-D Amplifier ：
• Piezo-Electric Speaker Driver
• Single-ended analog Input
• BTL output
• Output voltage = 8Vrms @VDD1=13V
• Filter-less solution
• Stereo mode
• Pop noise suppressor
• Output short protection
□ Boost DCDC Converter ：
• Input voltage (Battery) = 2.7V ∼ 4.5V Æ Boosted voltage will be 13V
• Over-current protection
• Over-voltage protection
□ Control function ：
• Pre-gain amplifier −6dB ∼ +15dB, 3dB step * Adjustable by Pin (PG0, PG1 and PG2) control
• Built-in Second order lowpass filter at Input.
• Cutoff Frequency (4kHz,8kHz,16kHz)
* Adjustable by Pin (PG0, PG1 and PG2) control
• Power-on/off control
• Over-temperature protection
□ Operational voltage ： VBAT=2.7V ∼ 4.5V、DVDDI=1.65V ∼ 4.5V
□ Operational temperature ： −30°C ∼ 85°C
□ Package ： 31pin WL-CSP (3.0mm × 3.0mm, 0.5mm pitch)
Rev.04.9
–1–
2008/03
1 page  
AKEMDAKEMD CONFIDENTIAL
ww[wA.DKa7ta8S4he6e]t4U.com
ABSOLUTE MAXIMUM RATINGS
(VSS1=VSS2=VSS3=VSS4=0V;Note 3)
Parameter
Symbol
min
Power Supplies: Battery
VBAT
−0.3
(Note.4)
Digital I/F
DVDDI
−0.3
Class-D Amp
VDD1,2
−0.3
Input Current, Any Pin Except Supplies
IIN -10
Analog Input Voltage (Note 4) (Note 6)
VINA
−0.3
Digital Input Voltage (Note 5) (Note 6)
VIND
−0.3
Ambient Temperature (powered applied)
Ta −30
Storage Temperature
Tstg −65
Note 2. All voltages are with respect to ground.
Note 3. VSS1, VSS2, VSS3, VSS4 pin must be connected to the same analog ground plane.
Note 4. INL,INR pin
Note 5. PDN, PG2, PG1, PG0, FC1, FC0 pin
Note 6. Maximum value must not exceed 6.5V even if VBAT or DVDDI is more than 6.2V.
max
6.5
6.5
15
+10
VBAT+0.3
DVDDI+0.3
85
150
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
Units
V
V
V
mA
V
V
°C
°C
RECOMMENDED OPERATING CONDITIONS
(VSS1=VSS2=VSS3=VSS4=0V; Note 2)
Parameter
Symbol
min
Power Supplies Battery (Note 7) VBAT
2.7
VDD (Note 8) VDDx
12
DigitalI/F(Note 7) DVDDI
1.65
Note 2. All voltages are with respect to ground.
Note 7. Should sustain “VBAT≧ DVDDI” condition
Note 8. Supply with boosted voltage (typ. 13V) by the Power Booster.
typ
3.6
13
2.8
max
4.5
14
4.5
* AKM assumes no responsibility for usage beyond the conditions in this datasheet.
DC CHARACTERISTICS
(Ta=25°C; VBAT=2.7 ∼ 4.5V,DVDDI = 1.65～4.5V,VSS1=VSS2=VSS3=VSS4=0V)
Parameter
Symbol min
typ
High-Level Input Voltage1 (Note 9)
VIH1 70%DVDDI -
Low-Level Input Voltage1 (Note 9)
VIL1 -
-
High-Level Input Voltage2 (Note 10)
VIH2 80%DVDDI -
Low-Level Input Voltage2 (Note 10)
VIL2 -
-
Input Leakage CurrentI
Note 9. Applied to PG0, PG1, PG2.
Note 10. Applied to PDN, FC1, FC2 (Summit trigger input).
Units
V
V
V
max
-
30%DVDDI
-
20%DVDDI
±10
Units
V
V
V
V
µA
Rev.04.9
–5–
2008/03
5 Page 
AKEMDAKEMD CONFIDENTIAL
ww[wA.DKa7ta8S4he6e]t4U.com
Performance characteristics
※ The following various characteristics are typical characteristic data in the typical condition. It is not the one
necessarily to secure the characteristic of the description.
(TBD)
Rev.04.9
– 11 –
2008/03
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AK7846.PDF ] | |
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