APA2070 Datasheet, PDF (1/24 Pages) Anpec Electronics Coropration – Stereo 2.6W Audio Power Amplifier (with DC Volume Control)

APA2070
Stereo 2.6W Audio Power Amplifier (with DC Volume Control)
Features
General Description
• 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 at 1% THD+N
- 2.4W, at V_DD=5V, BTLMode, R_L=3Ω
- 2W, at V_DD=5V, BTLMode, R_L=4Ω
at 10% THD+N
- 3.1W, at V_DD=5V, BTLMode, R_L=3Ω
-
2.6W,
at
V =5V,
DD
BTLMode,
R_L=4Ω
• Two Output Modes: BTL and SE Modes Selected
by SE/BTL Pin
• Low Current Consumption in Shutdown Mode
(1µA, typical)
• Short Circuit Protection
• Thermal Shutdown Protection and Over-Current
Protection Circuitry
• The OUTP Signal and the INN Signal are
Outphase
• Power Enhanced Package (DIP-16/DIP-16A)
• Lead Free and Green Devices Available
(RoHS Compliant)
Simplified Application Circuit
The APA2070 is a monolithic integrated circuit, which
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 APA2070 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
the thermal shutdown protection circuitry are integrated
in the APA2070, 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-
ing destroyed by over temperature and short current
failure. To simplify the audio system design, the APA2070
combines a stereo bridge-tied load (BTL) mode for
speaker drive and a stereo single-end (SE) mode for head-
phone drive into a single chip, where both modes are
easily switched by the SE/BTL input control pin signal.
Applications
• Notebook PC
• LCD Monitor or TV
L-CH
Input
R-CH
Input
DC Volume
Control
LINN
LOUTP
Stereo
Speaker
RINN
LOUTN
APA2070
ROUTP
VOLUME
ROUTN
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 - Oct., 2010
www.anpec.com.tw