APA2071 Datasheet, PDF (1/24 Pages) Anpec Electronics Coropration – Stereo 3.1W Non-inverting Audio Power Amplifier(with DC Volume Control)

APA2071
Stereo 3.1W Non-inverting Audio Power Amplifier(with DC Volume Control)
Features
General Description
• Non-Inverting Audio Power Amplifier
The APA2071 is a monolithic integrated circuit, which
• Low Operating Current about 9mA (Typical)
• Improved Depop Circuitry to Eliminate Turn-On
and Turn-Off Transients in Outputs
• 32-Step Volume Adjustable by DC Voltage
with Hysteresis
• Output Power
provides precise DC volume control, and a stereo
bridged audio power amplifiers capable of producing
2.6W (2W) into 4Ω with less than 10% (1.0%) THD+N.
The attenuator range of the volume control in APA2071 is
from 18dB (V_VOLUME=0V) to -80dB (V_VOLUME=3.54V) with 32
steps. The advantage of internal gain setting can be less
components and PCB area. Both the depop circuitry and
at 1% THD+N
the thermal shutdown protection circuitry are integrated
- 2.4W, at V_DD=5V, BTL Mode, R_L=3Ω
-
2W,
at
V =5V,
DD
BTL
Mode,
R_L=4Ω
at 10% THD+N
in the APA2071, that reduce pops and clicks noise dur-
ing power up or shutdown mode operation. It also im-
proves the power off pop noise and protects the chip be-
- 3.1W, at V_DD=5V, BTL Mode, R_L=3Ω
ing destroyed by over temperature and short current
•
- 2.6W, at V_DD=5V, BTL Mode, R_L=4Ω
Two Output Modes: BTL and SE Modes Selected
failure. To simplify the audio system design, the APA2071
combines a stereo bridge-tied load (BTL) mode for
speaker drive and a stereo single-end (SE) mode for head-
by SE/BTL Pin
phone drive into a single chip, where both modes are
• Low Current Consumption in Shutdown Mode
easily switched by the SE/BTL input control pin signal.
(1µA, Typical)
• Short Circuit Protection
• Thermal Shutdown Protection and Over Current
Protection Circuitry
Applications
•
The OUTN Signal and the INN Signal are Inphase _•
Notebook PC
• Power Enhanced Package (DIP-16 / DIP-16A)
• LCD Monitor or TV
• Lead Free and Green Devices Available
(RoHS Compliant)
Simplified Application Circuit
L-CH
Input
R-CH
Input
DC Volume
Control
LINN
LOUTN
Stereo
Speaker
RINN
LOUTP
APA2071
ROUTN
VOLUME
ROUTP
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.3 - Nov., 2008
www.anpec.com.tw