APA2058
2.4W Stereo Fully Differential Audio Power Amplifier With Stereo Class AB
Cap-free Headphone Driver and LDO
Features
•
•
General Description
The APA2058 is a stereo fully differential audio power
amplifier with stereo Class-AB cap-free headphone driver
and LDO available in a TQFN5X5-32A pins package.
The built-in gain setting at power amplifier can minimize
the external component counts. For the flexible application,
the gain can be set to 4-steps, 10, 12, 15.6, and 21.6dB by
gain control pins (GAIN0 and GAIN1). The power amplifier’
s
fully differential architecture provides high PSRR, in-
creased immunity to noise and RF rectification.
The APA2058 power amplifiers are capable of driving
2.4W at V
DD
=5V into 4Ω speaker, the cap-free headphone
drivers can provide 180mW at HV
DD
=3.3V into16Ω
headphones, and the LDO has a maximum 200mA(3.3V)
driver current for audio codec. The APA2058 provides ther-
mal and over-current protections.
The cap-free headphone driver eliminates the DC block-
ing capacitors at outputs, save the PCB space. The inte-
gration of fully differential power amplifier, cap-free head-
phone driver, and LDO is a best solution for VISTA
TM
re-
quirement and it can lower the total BOM costs.
Meeting VISTA
TM
Requirement
Fully Differential Power Amplifier with
Excellent RF Rectification Immunity
•
•
•
•
•
•
•
•
•
•
•
No Output Capacitor Required for Head
Phone Driver
Integrated LDO (Low Dropout Regulator) for
Audio Codec (3.3V)
Adjustable Gain Setting for Power Amplifier
A
V
=-1.5V/V Fixed Gain Setting for Headphone
Driver
Fast Start-up Time
Integrated De-Pop Circuitry
High PSRR (Power Supply Rejection Ratio)
Thermal and Over-Current Protections
Less External Components Required
Space Saving Package
– TQFN5x5-32A
Lead Free and Green Devices Available
(RoHS Compliant)
+0
Common Mode Rejection Ratio (dB)
Applications
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
20
•
•
•
LCD Monitor
Notebook
Protable DVD
V
DD
=5.0V
R
L
=4Ω
A
V
=10dB
V
in
=0.2V
PP
C
i
=0.47µF
Input Short
AMP Mode
Simplified Application Circuit
Audio
Codec
Stereo
Speakers
100
1k
10k 20k
Frequency (Hz)
Stereo
Headphone
LDO (Low Drop
-Out Regulator)
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.
Rev. A.3 - Aug., 2008
1
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
