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LX1708ILQ-TR

Description
Audio Amplifier, 15W, 2 Channel(s), 1 Func, CMOS, PQCC32, 7 X 7 MM, ROHS COMPLIANT, PLASTIC, MLPQ-32
CategoryAnalog mixed-signal IC    Consumption circuit   
File Size462KB,18 Pages
ManufacturerMicrosemi
Websitehttps://www.microsemi.com
Environmental Compliance  
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LX1708ILQ-TR Overview

Audio Amplifier, 15W, 2 Channel(s), 1 Func, CMOS, PQCC32, 7 X 7 MM, ROHS COMPLIANT, PLASTIC, MLPQ-32

LX1708ILQ-TR Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMicrosemi
Parts packaging codeQFN
package instruction7 X 7 MM, ROHS COMPLIANT, PLASTIC, MLPQ-32
Contacts32
Reach Compliance Codecompliant
ECCN codeEAR99
Nominal bandwidth20 kHz
Commercial integrated circuit typesAUDIO AMPLIFIER
JESD-30 codeS-PQCC-N32
JESD-609 codee3
length7 mm
Humidity sensitivity level1
Number of channels2
Number of functions1
Number of terminals32
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Nominal output power15 W
Package body materialPLASTIC/EPOXY
encapsulated codeHVQCCN
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1 mm
Maximum supply voltage (Vsup)15 V
Minimum supply voltage (Vsup)5 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMATTE TIN
Terminal formNO LEAD
Terminal pitch0.65 mm
Terminal locationQUAD
Maximum time at peak reflow temperature40
width7 mm

LX1708ILQ-TR Preview

LX1708
TM
®
Deleted:
LX1705
Deleted:
8
Deleted:
8W
15+15W
Stereo Filterless Class-D Amplifier
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
Filter Free Operation
12W
+12W Output Power @
4Ω
load: THD+N < 1%
High Efficiency >
85%
Full Audio Bandwidth: 20Hz to
20kHz
Low Distortion < 0.4% @ 30%
Max Power, 1kHz
High Signal-to-Noise Ratio:
90dB
Wide Supply Voltage Range
5.0V ~ 15V
5mA Per Channel Typical
Quiescent Current
Turn ON/OFF POP Free
Standby / Mute Feature
Built-in Under Voltage Lockout
Thermal Protection
Deleted:
1705
Deleted:
6W
Deleted:
6W
Deleted:
8Ω
Deleted:
90
Deleted:
25
Deleted:
1705
Deleted:
1705
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8W
Deleted:
90
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1705
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5mm
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5
Deleted:
APPLICATIONS
WWW .
Microsemi
.
C OM
The LX1708 is a fully integrated
stereo class-D CMOS audio amplifier.
optimized
for
highly
efficient
operation and minimum system cost.
The stereo BTL (Bridge-tied-load)
configuration uses 3-level PWM
modulation. This allows eliminating
the LC filter to reduce the system cost
and simplify the system design. The
LX1708 outputs
15W
into each of two
channels with better than
85%
efficiency. The entire signal path
from input to output is differential to
reject any sources of common-mode
noise or distortion.
The part features on–board H-bridge
output stages with low R
DSON
. External
bootstrap capacitors are all that is
required to provide the gate drive to the
all-NFET output stage since on-board
bootstrap diodes are provided.
The LX1708 also features Mute and
Standby modes, POP-free turn-on and
turn-off, under-voltage lockout for both
input supplies, and multi-level over-
temperature protection.
The LX1708 is offered in a small
thermally efficient footprint, low profile
surface mountable 32-pin Micro Lead
Quad Package (MLPQ) in
7mm
x
7mm.
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
LCD TV
Car Navigation
MP3 Docking Stations
Portable Sound System
PRODUCT HIGHLIGHT
STBY
5V
STBY
AVSS1
PVSS1N
OUT1N
BOOT1N
PVDD1
AVSS2
PVSS2N
OUT2N
BOOT2N
V5V
STATUS
N.C.
ROSC
TMON
PVDD
PVDD1
BOOT1P
OUT1P
LX1708
TCTRL
MUTE
VREF
IN1P
N.C.
STBY
PVDD2
PVDD2
BOOT2P
OUT2P
PVDD
PVDD
PVSS1P
IN1N
PVSS2P
IN2P IN2N
IN2N
LX1708
LX
1708
IN1N
IN1P
IN2P
MUTE
IN1N
Deleted:
Deleted:
5
IN1P
PACKAGE ORDER INFO
Deleted:
1705
T
A
(°C)
-40 to 85
LQ
Plastic MLPQ
32-Pin7mm x
7mm
RoHS Compliant / Pb-free
Deleted:
5mm
Deleted:
1705
Deleted:
1705
Deleted:
2007-03-20
Deleted:
2007-03-19
LX1708ILQ
Note: Available in Tape & Reel. Append the letters “TR” to the
part number. (i.e. LX1708ILQ-TR)
Copyright
©
2007
Rev. 1.3,
2007-04-05
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
LX1708
TM
®
Deleted:
LX1705
Deleted:
8
Deleted:
8W
15+15W
Stereo Filterless Class-D Amplifier
P
RODUCTION
D
ATA
S
HEET
ABSOLUTE MAXIMUM RATINGS
Power Supply Voltage (PVDD) ..................................................................... -0.3V to 16.5V
BOOTP/N - PVDD............................................................................................ -0.3 to 16.5V
Bias Supply Voltage (V5V) ................................................................................... -0.3 to 6V
Input Pins (IN1P/N, IN2P/N ,TCTRL, STBY, MUTE) ...................... -0.3V to V5V + 0.3V
Output Pins (VREF, STATUS, ROSC, TMON) ................................. -0.3V to V5V + 0.3V
Maximum Operating Junction Temperature................................................................ 150°C
Storage Temperature Range .......................................................................... -65°C to 150°C
Package Peak Temp. for Solder Reflow (40 seconds maximum exposure)....260°C (+0 -5)
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
AVSS, except as noted. Currents are positive into, negative out of specified terminal
.
PACKAGE PIN OUT
WWW .
Microsemi
.
C OM
BOOT1N
BOOT1P
30
PVSS1N
PVSS1P
32
BOOT1N
BOOT1P
PVSS1N
PVSS1P
OUT1N
OUT1P
31
PVDD1
29
PVDD1
28
OUT1N
OUT1P
PVDD1
PVDD1
27
26
25
24
23
32
31
30
29
28
27
26
25
STBY
IN1P
IN1N
N.C.
N.C.
IN2N
IN2P
MUTE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
TCTRL
TMON
AVSS2
ROSC
VREF
AVSS1
V5V
STATUS
STBY
IN1P
IN1N
N.C.
N.C.
IN2N
IN2P
MUTE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
MSC
LX1708
XXXX
22
21
20
19
18
17
PVSS2P
OUT2P
BOOT2P
PVDD2
PVDD2
BOOT2N
OUT2N
PVSS2N
PVSS2P
OUT2P
BOOT2P
PVDD2
PVDD2
BOOT2N
OUT2N
PVSS2N
THERMAL DATA
XXXX =
date code /
lot code
Deleted:
LQ P
ACKAGE
(Top View)
LQ
Formatted:
Font: (Default) Arial, 9
pt
Deleted:
5mm
Deleted:
5mm
Deleted:
21.6
Plastic MLPQ 32-Pin
7mm
x
7mm
THERMAL RESISTANCE
-
JUNCTION TO
A
MBIENT
,
θ
JA
Pb-free 100% Matte Tin Pin Finish
15.5°C/W
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
θ
JA
).
The
θ
JA
numbers are guidelines for the thermal performance of the device/pc-board system. All of the
above assume no ambient airflow.
P
ACKAGE
D
ATA
P
ACKAGE
D
ATA
Deleted:
2007-03-20
Deleted:
2007-03-19
Copyright
©
2007
Rev. 1.3,
2007-04-05
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
LX1708
TM
®
Deleted:
LX1705
Deleted:
8
Deleted:
8W
15+15W
Stereo Filterless Class-D Amplifier
P
RODUCTION
D
ATA
S
HEET
FUNCTIONAL PIN DESCRIPTION
Name
PVSS1P
PVSS1N
PVSS2P
PVSS2N
PVDD1
PVDD2
V5V
AVSS1
AVSS2
IN1N
IN1P
IN2N
IN2P
OUT1N
OUT1P
OUT2N
OUT2P
BOOT1N
BOOT1P
BOOT2N
BOOT2P
VREF
Function
Pin
Number(s)
32
25
16
9
28,29
12,13
18
19
22
3
2
6
7
26
31
15
10
27
30
14
11
20
Description
WWW .
Microsemi
.
C OM
Power
Ground
Power
Supply
Power
Supply
Analog
Ground
Analog
Input
Power Ground for the two H-bridge output drivers, connect to power ground plane
Power Supply for the two H-bridge output drivers. Current draw will be up to 1.6A at 2
x 8W into 8Ω. These are peak currents when the part is run at maximum rated power
on both channels.
Analog Power Supply for the analog signal processing section.
Analog Ground for the analog signal processing section. Must be at the same potential
as PVSS, connect at one point to the power ground plane.
Differential analog audio inputs for each channel. The common mode voltage will be
set by the LX1708 to around 2.25V.
Differential high power audio outputs for each channel. Each output will swing
between PVDD and PVSS. These outputs are driven by an on-chip H-bridge output
driver which uses low R
DSON
NFETs.
Bootstrap voltage pins which provide the high voltage needed to drive the upper NFET.
A bootstrap capacitor should be placed between the respective output and these pins.
Deleted:
1705
Digital
Output
Bootstrap
Analog
Output
CMOS
Input
CMOS
Input
CMOS
Output
Analog
Input
Test Pin
Test Pin
No
connect
Typical 2.25V reference voltage which serves as an internal reference. An external
compensation capacitor of at least 1uF should be connected between this pin and
AVSS.
Logic level control which mutes the audio signal when high.
Logic level control which places the chip into sleep mode when high.
Digital monitoring pin which is used to flag internal fault states. This pin will be
synchronized with the internal clock to prevent glitches. See the STATUS flag list
(below) for a summary of which conditions will force this pin to go high.
Frequency control pin. A resistor between this pin and AVSS will set the oscillation
frequency for the Class-D modulator.
Test purpose only, Connect to AVSS1
Test purpose only, left open.
No Connect, pin is open
MUTE
STBY
STATUS
ROSC
TCTRL
TMON
N.C.
8
1
17
21
24
23
4,5
P
ACKAGE
D
ATA
P
ACKAGE
D
ATA
The STATUS pin will go high under any of the following conditions:
STBY is high. This indicates that the chip is in “stand-by” mode.
V5V is below the V5V UVLO threshold.
PVDD is below the PVDD UVLO threshold.
The die temperature is above about 140°C. This indicates that the part has gone in to gain foldback.
A short circuit across the speaker has caused the output devices to shut off due to excessive temperature.
Deleted:
2007-03-20
Deleted:
2007-03-19
Copyright
©
2007
Rev. 1.3,
2007-04-05
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
LX1708
TM
®
Deleted:
LX1705
Deleted:
8
Deleted:
8W
15+15W
Stereo Filterless Class-D Amplifier
P
RODUCTION
D
ATA
S
HEET
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature -40°C < T
A
< 85°C except where
otherwise noted and the following test conditions: P
VDD
= 12V, P
VSS
= A
VSS
= 0V, V5V = 5V, R
ROSC
= 24.9kΩ
Parameter
OSCILLATOR
Oscillator Frequency
Temperature Stability
POWER SUPPLY
Supply Voltage
UVLO
UVLO Hysteresis
+5V Supply
UVLO
UVLO Hysteresis
Stand-By Current
Operating Current
Stand-By Current
Operating Current
Power Supply Rejection Ratio
Reference Voltage
GAIN
Stage Gain
Mute Gain
OFFSET
Output DC Offset
INPUT STAGE
Input Resistance
Common Mode Voltage
OUTPUT STAGE
MOSFET On Resistance
THERMAL
Thermal Shut Down Junction
Temperature
Thermal Gain Fold-back
Temperature
Thermal Recovery Temperature
MUTE / STBY
MUTE Threshold
STBY Threshold
STBY To Output Enable
Note 1: Not ATE Tested.
1
WWW .
Microsemi
.
C OM
Symbol
Test Conditions
Min
Varies with ROSC resistor value, value shown is
for default conditions.
T
A
= -40°C to 85°C
LX1708
Typ
Max
Units
Deleted:
1705
F
OSC
250
300
2
350
kHz
%
PVDD
PVDD
PVDD
V5V
V5V
V5V
I
QQ
I
QQ
I
QQ
5V5
IQQ5V5
PSRR
VREF
For PVDD, STBY high
For PVDD, STBY low, Mute high
For 5V5, STBY high
For 5V5, STBY low, Mute high
For PVDD @ 1kHz
C bypass = 1µF
Start-up Voltage , Rising
Start-up Voltage, Rising
5
12
4.5
500
15
4.9
V
mV
4.5
4.25
250
10
10
10
7
55
2.25
5.5
4.50
V
mV
50
30
µA
mA
µA
15
mA
dB
V
G
G
MUTE
f = 1kHz; V
MUTE
= 0V
V
MUTE
= 5V
26
-40
dB
V
OFFSET
Measured Differentially. Channel + to Channel -
40
mV
R
IN
V
CM
22
2.25
kΩ
V
R
DSON
I
DS
= 200mA
220
mΩ
E
LECTRICALS
E
LECTRICALS
T
SD
T
FB
T
REC
150
140
110
°C
MUTE
TH
STBY
TH
Mute Mode
V5V 2
V5V 2
V
ms
5
Deleted:
2007-03-20
Deleted:
2007-03-19
Copyright
©
2007
Rev. 1.3,
2007-04-05
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
LX1708
TM
®
Deleted:
LX1705
Deleted:
8
Deleted:
8W
15+15W
Stereo Filterless Class-D Amplifier
P
RODUCTION
D
ATA
S
HEET
TYPICAL SYSTEM APPLICATION CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature -40°C < TA < 85°C except where
otherwise noted and the following conditions: P
VDD
= 12V, P
VSS
= A
VSS
= 0V, V5V = 5V, R
OSC
= 25kΩ, R
L
=
4Ω.
Parameter
AUDIO CHARACTERISTICS
Output Power Stereo
P
O
THD+N < 1%
THD+N <10%
P
OUT
= 50% of Maximum Power, F
IN
= 1kHz
with diodes
P
OUT
= 50% of Maximum Power, F
IN
= 1kHz
No diodes
P
OUT
= 1W, F
IN
= 20Hz~20kHz
Power Efficiency
Channel Crosstalk
Audio Bandwidth
Stage Gain Stereo
High
Low
SNR
V
N
V
XTALK
BW
P
OUT
= Max, THD+N < 1%
P
OUT
= 1W, F
IN
= 1kHz
P
OUT
= 1W, F
IN
= 20-20kHz
V
IN
= 200mV
RMS
, F = 20Hz~20kHz
V
IN
= 2V
RMS
, F
IN
= 20Hz~20khz
F
IN
= 1kHz @ 20Hz-20kHz non A-weighted
Input short, non A-weighted @ 20Hz-20kHz
26
-40
90
200
dB
µV
RMS
12
15
0.4
0.4
0.6
85
-60
3
dB
%
%
W
WWW .
Microsemi
.
C OM
Deleted:
8Ω
Deleted:
1705
Symbol
Test Conditions
Min
LX1708
Typ
Max
Units
Deleted:
6
Deleted:
8
Deleted:
2
Deleted:
5
Deleted:
4
Deleted:
90
Total Harmonic Distortion Stereo
THD+N
Signal to Noise Ratio
Output Noise Floor
E
LECTRICALS
E
LECTRICALS
Deleted:
2007-03-20
Deleted:
2007-03-19
Copyright
©
2007
Rev. 1.3,
2007-04-05
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
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