LX1725 Datasheet, PDF (1/23 Pages) Microsemi Corporation – 15W+15W Stereo Class-D Amplifier Filterless 30W Mono in BTL

LX1725
®
15W+15W Stereo Class-D Amplifier
TM
Filterless 30W Mono in BTL
PRODUCTION DATA SHEET
DESCRIPTION
The Microsemi LX1725 is part of a The LX1725 features Mute and
new generation of fully integrated Standby modes, over-current protection,
stereo class-D amplifiers from POP-free turn-on and turn-off, under-
Microsemi. The fully integrated half- voltage lockout, over-voltage protection
bridge output for each channel works and over-temperature protection. All
with both split and single power built-in protection modes allow
supply operation. The outputs can be automatic recovery when the fault
bridged to run in BTL (Bridge Tied condition has been cleared. The gain is
Load) mode. In BTL mode, 3-level pin selectable between 14 / 20 / 26dB to
modulation is used which allow accommodate different signal source
operation without an L-C filter to amplitudes. Several LX1725s can be
reduce system cost and area. The easily synchronized together to prevent
LX1725 has >90% efficiency, with beat frequency interference in multi-
typical output power up to 15W+15W channel applications..
in stereo, and 30W BTL into a 4Ω The LX1725 comes in a MLPQ 32
load with less than 1% THD+N. The pin package with a 7mmx7mm small
amplifier operates over a wide supply outline surface mount.
voltage range of ±6V to ±15V split
supply or 12V to 30V single supply,
and consumes a very little quiescent
current.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
VCOM
IN1P
IN1N
VPOS
VCOM
Sychronize
FLAG
VNEG
IN2P
IN2N
VCOM
PRODUCT HIGHLIGHT
HIGAIN
+5V
4.7µF
1µF
35V
VCOM
1µF
32 31 30 29 28 27 26 25
1
VPOSA
2 _VCOMA
3
SYNC
R_LIM
4
5
FLAG
RILIM
1µF 35V
6 _VREF
C_OSC
7 _COSC
8
VNEGA
LX1725
24
STBY
VPOS1 ²³
22
OUT1
21
VNEG1
20
VNEG2
19
OUT2
18
VPOS2
MASTER
17
STBY
VPOS
22µH
VNEG
820nF
22µH
820nF
VPOS
1µF
1µF
9 10 11 12 13 14 15 16
Master / Slave
MUTE / GAIN
VNEGA
KEY FEATURES
ƒ 12Wx2 @ 4Ω THD+N<1%
16Wx2 @ 4Ω THD+N<10%
ƒ 25W BTL @ 8Ω THD+N<1%
32W BTL @ 8Ω THD+N<10%
ƒ High Efficiency: >90% @8Ω
ƒ Full Audio Band: 20Hz~20KHz
ƒ Low Distortion:
<0.1% @1KHz, 8Ω
<0.4% @20~20KHz, 8Ω
ƒ High Signal-to-Noise Ratio:
>85dB non A-Weighted
ƒ Split/Single Power Supply
ƒ Wide Supply Voltage Range:
±6V ~ ±15V or 12V ~ 30V
ƒ Low Quiescent Current <20mA
ƒ Turn ON/OFF POP Free
ƒ STANDBY/MUTE Feature
ƒ Programmable Gain
14/20/26dB
ƒ Built-in Over Current Protection
ƒ Built-in Under Voltage Lockout
ƒ Thermal Shut Down
ƒ Power Limiting Based on Die
Temperature (gain fold back)
ƒ Synchronization
APPLICATIONS
ƒ LCD TV, PDP Sets
ƒ CD/DVD Combo Player
ƒ Combo DVD 5.1 Amplifier
ƒ Home Theater System
ƒ Computer Speaker System
ƒ Game Machine
PACKAGE ORDER INFO
T_J(°C)
Plastic MLPQ
LQ _32-PIN
RoHS Compliant / Pb-free
-40 to +85
LX1725ILQ
Note: Available in Tape & Reel. Append the letters “TR” to the part
number. (i.e. LX1725ILQ-TR)
Copyright © 2004
Rev. 1.2, 2005-12-06
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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