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 ope rate
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 8Ω mono speaker and two class AB
headphone amplifiers for driving 16Ω or 32Ω 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 8Ω 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 32Ω
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 inp ut is
sent to the right headphone speaker and the active lef t
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.
FN6513.1
Features
• Class AB 94mW Headphone Amplifiers and 941mW Mono
BTL Speaker Amplifier
• Battery powered, Handheld, and Portable Equipment
- Cellular/mobile Phones
- PDA’s, MP3 Players, DVD Players, Cameras
- Laptops, Notebooks, Palmtops
- Handheld Games and Toys
• Desktop Computers
Simplified Block Diagram
V
DD
R
L
GAIN
ROUTER/
SWITCHER
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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
CLICK
AND
POP
SD
GS0
GS1
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
LOGIC
CONTROL
HO
ISL54004
Copyright Intersil Americas Inc. 2007. All Rights Reserved
BIAS
THERMAL
SHUTDOWN
ISL54004
Pinout
ISL54004
(20 LD 4X4 TQFN)
TOP VIEW
SPK-
SPK+
VDD
GND
HpR
GND
2019181716
1
2
3
4
5
678910
VDD
HpL
GS1
HD
INRNCGSO
REF
GND
HO
15
SD
14
NC
13
VDD
12
INL
11
Ordering Information
TEMP.
PART
NUMBER
PART
MARKING
RANGE
(°C)PACKAGE
ISL54004IR*540 04IR-40 to +85 20 Ld 4x4 TQFN L20.4x4A
ISL54004IRTZ*
(Note)
540 04IRTZ -40 to +85 20 Ld 4x4 TQFN
Tape and Reel
(Pb-free)
*Add “-T” suffix for tape and reel
NOTE: Intersil Pb-free products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both
SnPb and Pb-free soldering operations. Intersil Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020C.
PKG.
DWG. #
L20.4x4A
Pin Descriptions
PINNAMEFUNCTION
3, 6, 12VDDSystem Power Supply
4, 9, 20GNDGround Connection
5HpRHeadphone Right Ouput
7HpLHeadphone Left Ouput
2SPK+Positive Speaker Output
1SPK-Negative Speaker Output
14SDShutdown, High to disable amplifiers, Low
for normal operation.
8HDHeadphone Detection, Internally pulled up to
V
Low in Mono Mode, High in
DD,
Headphone Mode if HO = Low
15HOHeadphone Override, High in Mono Mode,
Low in Headphone Mode if HD = High
16, 18GS_Gain Select
10REFCommon-mode Bias V oltage, By-pass with a
1µF capacitor to GND.
ISL54004 Truth Table
SD GS1 GS0 HD HOSPK+/SPK-HpRHpL
1XXXXDisabledDisabled Disabled
00 00X IN
00 010-INRIN
00 011 INR + IN
00 10X1.2 x (IN
00 110-1.2 x INR1.2 x IN
00 1111.2 x (INR + INL)-01 00X2 x (IN
01 010-2 x IN
01 0112 x (INR + INL)-01 10X4 x (IN
01 110-4 x IN
01 1114 x (INR + INL)--
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adv ersely impact product reliability and
result in failures not covered by warranty.
NOTE:
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
1. θ
JA
Tech Brief TB379.
2. For θ
, the “case temp” location is the center of the exposed metal pad on the package underside.