LX1708 Datasheet, PDF (1/18 Pages) Microsemi Corporation – 15+15W Stereo Filterless Class-D Amplifier

LX1708
®
15+15W Stereo Filterless Class-D Amplifier
TM
PRODUCTION DATA SHEET
DESCRIPTION
The LX1708 is part of a new The part features on–board H-bridge
generation of fully integrated stereo output stages with low RDSON.
class-D amplifiers from Microsemi. External bootstrap capacitors are all that
This CMOS audio amplifier is is required to provide the gate drive to
optimized for highly efficient the all-NFET output stage since on-
operation and minimum system cost. board bootstrap diodes are provided.
The stereo BTL (Bridge-tied-load) The LX1708 also features Mute and
configuration uses 3-level PWM Standby modes, over-current protection,
modulation. This allows eliminating POP-free turn-on and turn-off, under-
the LC filter to reduce the system cost voltage lockout, over-voltage protection,
and simplify the system design. The and over-temperature protection.
LX1708 outputs 15W into each of two The LX1708 is offered in a small
channels with better than 85% footprint, low profile surface mountable
efficiency.
32-pin Micro Lead Quad Package
(MLPQ) in 7mm x 7 mm.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
STBY
KEY FEATURES
ƒ Filter Free Operation
ƒ 15W +15W Output Power @
4Ω load: THD+N < 1%
ƒ High Efficiency > 85%
ƒ Full Audio Bandwidth: 20Hz to
20KHz
ƒ Low Distortion < 0.15% @ 30%
Max Power, 1KHz
ƒ High Signal-to-Noise Ratio:
90dB
ƒ Wide Supply Voltage Range
5.0V ~ 15V
ƒ Low Quiescent Current < 30mA
ƒ Turn ON/OFF POP Free
ƒ Standby / Mute Feature
ƒ Built-in Under Voltage Lockout
ƒ Thermal Protection
ƒ Short Circuit Protection
APPLICATIONS
ƒ LCD TV
ƒ Car Navigation
ƒ Computer:
ƒ Portable Sound System
5V
Copyright © 2004
Rev.1.2, 2007-01-05
PVDD
IN1N
IN1P
AVSS1
PVSS1N
OUT1N
AVSS2
PVSS2N
OUT2N
BOOT1N
BOOT2N
LX1708 ^PVDD1
PVDD2
PVDD1
PVDD2
BOOT1P
BOOT2P
OUT1P
PVSS1P
IN1N
OUT2P
PVSS2P
IN2P IN2N
PVDD
IN2N
IN2P
MUTE
PACKAGE ORDER INFO
Plastic MLPQ
T_A (°C)
LQ ^32-Pin
7mmx7mm
RoHS Compliant / Pb-free
-40 to 85
LX1708ILQ
Note: Available in Tape & Reel. Append the letters
“TR” to the part number. (i.e. LX1708ILQ-TR)
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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