LX1705 Datasheet, PDF (1/17 Pages) Microsemi Corporation – 8+8W Stereo Filterless Class-D Amplifier

LX1705
®
8+8W Stereo Filterless Class-D Amplifier
TM
PRODUCTION DATA SHEET
DESCRIPTION
The LX1705 is a fully integrated The part features on–board H-bridge
stereo class-D CMOS audio amplifier. output stages with low R_DSON. External
optimized for highly efficient bootstrap capacitors are all that is
operation and minimum system cost. required to provide the gate drive to the
The stereo BTL (Bridge-tied-load) all-NFET output stage since on-board
configuration uses 3-level PWM bootstrap diodes are provided.
modulation. This allows eliminating _{The LX1705 also features Mute and}
the LC filter to reduce the system cost _{Standby modes, POP-free turn-on and}
and simplify the system design. The _{turn-off, under-voltage lockout for both}
LX1705 outputs 8W into each of two _{input supplies, and multi-level over-}
channels with better than 90% _{temperature protection.}
efficiency. The entire signal path
from input to output is differential to
reject any sources of common-mode
noise or distortion.
The LX1705 is offered in a small
thermally efficient footprint, low profile
surface mountable 32-pin Micro Lead
Quad Package (MLPQ) in 5mm x 5
mm.
KEY FEATURES
ƒ Filter Free Operation
ƒ 6W +6W Output Power @ 8Ω
load: THD+N < 1%
ƒ High Efficiency > 90%
ƒ Full Audio Bandwidth: 20Hz to
20kHz
ƒ Low Distortion < 0.25% @ 30%
Max Power, 1kHz
ƒ High Signal-to-Noise Ratio:
90dB
ƒ Wide Supply Voltage Range
5.0V ~ 15V
ƒ 5mA Per Channel Typical
Quiescent Current
ƒ Turn ON/OFF POP Free
ƒ Standby / Mute Feature
ƒ Built-in Under Voltage Lockout
ƒ Thermal Protection
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
APPLICATIONS
ƒ LCD TV
ƒ Car Navigation
ƒ MP3 Docking Stations
ƒ Portable Sound System
PRODUCT HIGHLIGHT
STBY
5V
Copyright © 2007
Rev. 1.2, 2007-03-20
PVDD
IN1N
IN1P
AVSS1
PVSS1N
OUT1N
AVSS2
PVSS2N
OUT2N
BOOT1N
BOOT2N
LX1705 ^PVDD1
PVDD2
PVDD1
PVDD2
BOOT1P
BOOT2P
OUT1P
PVSS1P
IN1N
OUT2P
PVSS2P
IN2P IN2N
PVDD
IN2N
IN2P
MUTE
PACKAGE ORDER INFO
T_A (°C)
Plastic MLPQ
LQ _{32-Pin 5mm x 5mm}
RoHS Compliant / Pb-free
-40 to 85
LX1705ILQ
Note: Available in Tape & Reel. Append the letters “TR” to the
part number. (i.e. LX1705ILQ-TR)
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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