PAM8945
4.0W CLASS-G AUDIO AMPLIFIER WITH INTEGRATED
BOOST CONVERTER AND BATTERY TRACKING AGC
PROVISIONAL PRODUCT
Description
Pin Assignments
(Top View)
The PAM8945 is a high-efficiency Class-G audio power
amplifier with an integrated boost converter. It drives up to
4.0W (10% THD+N) into a 4Ω speaker. With 85% typical
efficiency, the PAM8945 helps extend battery life when
playing audio.
The built-in boost converter generates the voltage rail for the
output stage. This provides a louder audio output than a
stand-alone amplifier connected directly to the battery. It also
maintains a consistent loudness, regardless of battery
voltage.
The PAM8945 features battery tracking AGC function which
adjusts the amplifier gain to limit battery current at lower
battery voltage.
SW
12
11
PVDD
1
10
VBAT
OUT+
2
9
AGC
OUT-
3
8
EN
PGND
4
7
IN+
5
5
6
6
AGND
IN-
5
The PAM8945 features DC input protection and all outputs
are fully protected against output-to-output shorts. The
PAM8945 is available in tiny W-QFN2030-12 package.
5
W-QFN2030-12
Features
Applications
Built-in Battery Tracking Automatic Gain Control (AGC)
High-Efficiency Integrated Boost Converter Over 85%
4.0W into a 4Ω Load at 10% THD
3.2W into a 4Ω Load at 1% THD
Operates from 2.8V to 5.2V
Efficient Class-G Prolongs Battery Life
Minimized ON/OFF Pop Noise
Superior Low Noise
High PSRR
DC Input Protection
Auto-Recovery Short-Circuit Protection
Thermal Shutdown
Available in 2.0mm x 3.0mm 12L W-QFN Package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
BGND
Cell Phones
PDA
GPS
Portable Electronics
Speakers
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and
Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain
很抱歉,暂时无法提供与“PAM8945PJR”相匹配的价格&库存,您可以联系我们找货
免费人工找货