Preliminary Datasheet
LPA2150
2×3Walts Stereo Class-D Audio Power Amplifier
General Description
The LPA2150 is a high efficiency, 2x3.0W class-D audio power
amplifier. A new developed filter less PWM modulation architecture
further reduces EMI and THD+N, as well as eliminates the LC
output filter, reducing external component count, sys cost, and
simplifying design.
Operating in a single 5V supply, LPA2150 is capable of driving 4Ω
speaker load at a continuous average output of 3.05W/10%
THD+N or 2.6W/1% THD+N. The LPA2150 has high efficiency
with speaker load compared to a typical class D amplifier. With a
3.6V supply driving an 8Ω speaker, the efficiency for a 400mW
power level is 90%.In cellular handsets, the earpiece, speaker
phone, and melody ringer can each be driven by the LPA2150.
The gain of LPA2150 is externally configurable which allows
independent gain control from multiple sources by summing
signals from separate sources.
The LPA2150 is available in space-saving SOP16 packages.
Features
Unique Modulation Scheme Reduces EMI Emissions
Efficiency at 3.6V With an 8-Ω Speaker:
−
90% at 400 mW
−
82% at 100 mW
Low 2.5mA Quiescent Current
0.5µA Shutdown Current
2.5V to 6V Wide Supply Voltage
Shutdown Pin has 1.8V Compatible Thresholds
Optimized PWM Output Stage Eliminates LC Output Filter
Improved PSRR (−80 dB) Eliminates Need for a Voltage
Regulator
Fully Differential Design Reduces RF Rectification and
Eliminates Bypass Capacitor
Improved CMRR Eliminates Two Input Coupling Capacitors
Internally Generated 750kHz Switching Frequency
Integrated Pop and Click Suppression Circuitry
SOP16 Packaging
RoHS compliant and 100% lead(Pb)-free
Order Information
LPA2150
Typical Application Circuit
F: Pb-Free
□ □
□
Package Type
SO: SOP16
Applications
PDA/DSC
Portable Audio Speaker
Cellular and Smart mobile phone
Bluetooth Speaker
Marking Information
Device
LPA2150
Marking
LPS
LPA2150
YWX
Y:Year code. W:Week code. X:Batch number.
Package
SOP16
Shipping
3K/REEL
LPA2150–00
May.-2013
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 1 of 11
Preliminary Datasheet
Function Block Diagram
GVDD
PVCCL
LPA2150
PVCCL
+
-
PWM
LOGIC
+
-
PLIMIT
GATE
DRIVE
OUTPL
LINP
LINN
- +
+ -
-
+
GVDD
PVCCL
PGND
PVCCL
SD
TTL
BUFFER
-
+
GATE
DRIVE
OUTNL
PLIMIT
REFERENCE
RAMP
GENERATOR
BIASES AND
REFERENCE
STARUP
PROTECTION
LOGIC
THERMAL
DETECT
PGND
AVDD
VDD
LDO
REGULATOR
GVDD
PVCCL
PVCCL
GVDD
+
-
GATE
DRIVE
OUTNR
RINN
RINP
-+
+-
- +
+ -
PLIMIT
PWM
LOGIC
GVDD
PVCCL
PGND
PVCCL
+
-
GND
GATE
DRIVE
OUTPR
PGND
Absolute Maximum Ratings
Input Voltage to GND (VINL, VINR) -------------------------------------------------------------------------------------------------------------- 6V
Supply Voltage, V
DD
------------------------------------------------------------------------------------------------------------------ -0.3 V to 6V
Voltage at Any Input Pin ------------------------------------------------------------------------------------------------------ -0.3 V to V
DD
+0.3
Junction Temperature, T
JMAX
------------------------------------------------------------------------------------------------------------- 150°C
Storage Temperature Rang, T
stg
ESD Susceptibility
--------------------------------------------------------------------------------------------- -65°C to 150°C
------------------------------------------------------------------------------------------------------------------------------ 2kV
Lead temperature (10 seconds) ------------------------------------------------------------------------------------------------------------ 260°C
Thermal Resistance
θ
JA
(WCSP) ---------------------------------------------------------------------------------------------------- 77°C/W
LPA2150–00
May.-2013
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 3 of 11
Preliminary Datasheet
Electrical Characteristics
Symbol
VOS
PSRR
CMRR
IIH
IIL
IQ
ISHDN
f
SW
Gain
Parameter
Output offset voltage
Power supply rejection ration
(measured differentially)
Common mode rejection ratio
High-level input current
Low-level input current
Quiescent current
Shutdown Current
Switching frequency
Conditions
Vin=0V,Av=2V/V,VDD=2.5V to 5.5V
VDD=2.5V to 5.5V
VDD=2.5V to 5.5V,Vic=VDD/2 to 0.5V,
Vin=VDd/2 to Vdd-0.8V
VDD=5.5V, Vi=5.8V
VDD=5.5V, Vi=-0.3V
VDD=5.5V, no load
VDD=3.6V, no load
VDD=2.5V, no load
VSHDN=0.35V, VDD=2.5V to 5.5V
VDD=2.5V to 5.5V
VDD=2.5V to 5.5V
THD+N=10%,
F=1KHz,RL=4
THD+N=1%,
F=1KHz,RL=4
PO
Output power
THD+N=10%,
F=1KHz,RL=8
THD+N=1%,
F=1KHz,RL=8
Total harmonic distortion
plus noise
Supply ripple rejection ratio
Common mode rejection ratio
Start-up time from shutdown
VDD=5V,,Po=1W,RL=8
VDD=5.0V
VDD=3.6V
VDD=2.5V
VDD=5.0V
VDD=3.6V
VDD=2.5V
VDD=5.0V
VDD=3.6V
VDD=2.5V
VDD=5.0V
VDD=3.6V
VDD=2.5V
f=1KHz
f=1KHz
f=1KHz
3.05
1.28
0.64
2.6
1.06
0.46
1.7
0.79
0.39
1.36
0.64
0.32
0.123
0.130
0.163
3.52
2.40
2.06
0.5
750
LPA2150
Min.
Typ.
1
-72
-60
LPA2150
Max.
25
-55
-48
100
5
Unit
mV
dB
dB
uA
uA
mA
µA
KHz
V/V
W
W
W
W
THD+N
VDD=3.6V,,Po=0.5W,RL=8
VDD=2.5V,,Po=0.2W,RL=8
VDD=3.6V,Inputs F=217Hz,
ac-grounded
with Ci=2uF
VDD=3.6V,
Vic=1Vpp
VDD=3.6
%
kSVR
CMRR
Zt
Vripple=200mVpp
F=217Hz
-70
-80
40
dB
dB
mS
LPA2150–00
May.-2013
Email:
marketing@lowpowersemi.com
www.lowpowersemi.com
Page 4 of 11
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