廬
ISL54004
Data Sheet
October 30, 2007
FN6513.2
Integrated Audio Amplifier Systems
The Intersil ISL54004 device is an integrated audio power
amplifier system that combines a mono BTL amplifier and
stereo headphone amplifiers in a single device. It can operate
from a single +2.7V to +5V power supply and is offered in a
20 Ld 4x4 TQFN package. Targeted applications include
handheld equipment such as cell-phones, MP3 players, and
games/toys.
The ISL54004 part contains one class AB BTL type power
amplifier for driving an 8惟 mono speaker and two class AB
headphone amplifiers for driving 16惟 or 32惟 headphone
speakers.
The BTL when using a 5V supply is capable of delivering
800mW (typ) with 0.4% THD+N and 941mW (typ) with 1%
THD+N of continuous average power into an 8惟 BTL speaker
load.
Each headphone amplifier when using a 5V supply is capable
of delivering 50mW (typ) with 0.3% THD+N and 94mW (typ)
with 1% THD+N of continuous average power into a 32惟
headphone speaker.
When in Mono mode the part automatically mixes the left and
right audio inputs and sends the combined signal to the BTL
driver. In Headphone Mode, the active right channel input is
sent to the right headphone speaker and the active left
channel is sent to the left headphone speaker.
The ISL54004 has a four-level programmable gain stage to
boost the audio signal. The part requires no external gain
setting resistors.
The ISL54004 part features headphone sense input circuitry
that detects when a headphone jack has been inserted and
automatically switches the audio inputs from the mono BTL
output driver to the headphone drivers. The part also has a
logic control pin that can override the headphone sense
input circuitry.
The part also features low power shutdown, thermal
overload protection and click and pop suppression. The click
and pop circuitry prevents click and pops at the speakers
when transitioning in and out of shutdown.
Features
鈥?Class AB 94mW Headphone Amplifiers and 941mW Mono
BTL Speaker Amplifier
鈥?THD+N at 1kHz, 800mW into 8惟 BTL . . . . . . . . . . . . . .0.4%
鈥?THD+N at 1kHz, 15mW into 32惟 Headphone . . . . . . .0.07%
鈥?THD+N at 1kHz, 50mW into 32惟 Headphone . . . . . . . .0.3%
鈥?Single Supply Operation . . . . . . . . . . . . . . . . .+2.7V to +5.5V
鈥?Headphone Sense Input and Low Power Shutdown
鈥?Thermal Shutdown Protection
鈥?鈥淐lick and Pop鈥?Suppression Circuitry
鈥?Selectable Gain Settings
鈥?TTL Logic-Compatible
鈥?Available in 20 Ld 4x4 TQFN
鈥?Pb-Free (RoHS Compliant)
Applications
鈥?Battery-powered, Handheld, and Portable Equipment
- Cellular/mobile Phones
- PDA鈥檚, MP3 Players, DVD Players, Cameras
- Laptops, Notebooks, Palmtops
- Handheld Games and Toys
鈥?Desktop Computers
Simplified Block Diagram
V
DD
R
L
GAIN
ROUTER/
SWITCHER
CLICK
AND
POP
SD
GS0
GS1
HO
BIAS
LOGIC
CONTROL
THERMAL
SHUTDOWN
ISL54004
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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