APA2051 Datasheet, PDF (1/32 Pages) Anpec Electronics Coropration – 2.4W Stereo Audio Power Amplifier (with Gain Setting) & Capfree Headphone Driver

APA2051
2.4W Stereo Audio Power Amplifier (with Gain Setting) & Capfree Headphone Driver
Features
• Operating Voltage
– HV_DD= 3.0~3.6V
– V = 4.5~5.5V
DD
• No Output Capacitor at Headphone Amplifier
Required
• Meeting VISTA Requirement
• Low Distortion
AMP Mode
–
THD+N=56dB,
at
V
DD
=
5V,
R
L
=
4Ω,
P =1.5W
O
–
THD+N=64dB,
at
V
DD
=
5V,
R
L
=
8Ω,
P =0.9W
O
HP Mode
– THD+N=73dB, at HV_DD=3.3V, R_L=16Ω
P_O=125mW
– THD+N=77dB, at HV_DD=3.3V, R_L=32Ω,
P =88mW
O
–
THD+N=85dB,
at
HV =3.3V,
DD
R_L=10kΩ,
V_O=1.7Vrms
• Output Power at 1% THD+N
– 1.9W, at V_DD = 5V, AMP Mode, R_L = 4Ω
– 1.2W, at V_DD = 5V, AMP Mode, R_L = 8Ω
• at 10% THD+N
–2.4W
at
V
DD
=
5V,
AMP
Mode,
R
L
=
4Ω
–1.5W at V_DD = 5V, AMP Mode, R_L = 8Ω
• Depop Circuitry Integrated
• Internal 19-Steps Gain Setting for Flexible Appli
cation
• Thermal Shutdown Protection and Over-Current
Protection Circuitry
• High Supply Voltage Ripple Rejection
• Surface-Mount Packaging
– TQFN4x4-28 (with Enhanced Thermal Pad)
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• Note Book PCs
• LCD Monitor
General Description
The APA2051 is a monolithic integrated circuit, which
combines a stereo power amplifier and a stereo output
capacitor-less headphone amplifier. The stereo power
amplifier provides 19-steps gain setting for flexible
application. The headphone amplifier is ground-refer-
ence output, and no need the output capacitors for DC
blocking. The advantages of eliminating the output ca-
pacitor are saving cost, PCB’s space, and component
height.
Both the de-pop circuitry and the thermal shutdown pro-
tection circuitry are integrated in the APA2051, which re-
duces pops and clicks noise during power on/off and in
shutdown mode. Thermal shutdown protects the chip
from being destroyed by over-temperature failure. To sim-
plify the audio system design in notebook computer
applications, the APA2051 provides the internal gain
setting, and these features can minimize components
and PCB area.
The APA2051 is available in TQFN4x4-28 package. This
package is characterized by space saving and thermal
efficiency.
Simplified Application Circuit
Audio Codec
Stereo
Speakers
Stereo
Headphone
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
1
Rev. A.4 - Aug., 2009
www.anpec.com.tw