HWD2182
250mW Audio Power Amplifier with Shutdown Mode
General Description
The HWD2182 isa single-ended audio power amplifier ca-
pable of delivering 250mW of continuous average power into
an 8
Ω load with 1% THD+N from a 5V power supply.
audio power amplifiers were designed specifically
to provide high quality output power with a minimal amount
of external components using surface mount packaging.
Since the HWD2182 does not require bootstrap capacitors or
snubber networks, it is optimally suited for low-power por-
table systems.
The HWD2182 features an externally controlled, low power
consumption shutdown mode which is virtually clickless and
popless, as well as an internal thermal shutdown protection
mechanism.
The unity-gain stable HWD2182 can be configured by external
gain-setting resistors.
Key Specifications
j THD+N at 1kHz at 250mW
continuous average output
power into 8
Ω
1.0% (max)
j Output Power at 1% THD+N
at 1kHz into 4
Ω
380mW (typ)
j THD+N at 1kHz at 85mW
continuous average output
power into 32
Ω
0.1% (typ)
j Shutdown Current
0.7µA (typ)
Features
n
MSOP surface mount packaging
n
“Click and Pop” Suppression Circuitry
n
Supply voltages from 2.4V–5.5V
n
Operating Temperature −40˚C to 85˚C
n
Unity-gain stable
n
External gain configuration capability
n
No bootstrap capacitors, or snubber circuits are
necessary
Applications
n
Personal Computers
n
Cellular Phones
n
General Purpose Audio
Typical Application
Connection Diagram
*Refer to the Application Information Section for information concerning
proper selection of the input and output coupling capacitors.
FIGURE 1. Typical Audio Amplifier Application Circuit
MSOP and SOIC Package
Top View
Order Number HWD2182MM or HWD2182M
1