LPA2162 Datasheet, PDF (1/11 Pages) Lowpower Semiconductor inc – Integrated PWM/PFM boost convertor

Preliminary Datasheet
LPA2162
Filterless 2x7W Class- D Stereo Audio Amplifier
With PWM/PFM mode boost convertor
General Description
The LPA2162 is a 2×7W, class-D audio amplifier with
external MOS step up convertor integrated. It offers low
THD+N, allowing it to achieve high-quality Power Supply
sound reproduction. The new filterless architecture
allows the device to drive the speaker directly requiring
no low-pass output filters, thus to save the system cost
and PCB area.
With high performance external N-MOS and diode，the
LPA2162 can provide up to 7.5V stable DC voltage for
amplifier so that it can display 2×7W output at 10% THD
with a 4 Ω load. When it provides 5V DC voltage, it can
provide 2×3W output at 10% THD with a 4 Ω load. The
efficiency of LPA2162 is much better than that of
class-AB cousins with the same numbers of external
components. The LPA2162 is available in ETSSOP-20.
Order Information
LPA2162 □ □ □
F: Pb-Free
Package Type
ETSSOP-20
Features
 Integrated PWM/PFM boost convertor
 Low start up voltage with 1V
 Shut-down current:<5uA
 Output voltage Up to 7.5V/3A
 Internal Compensation
 Duty cycle：13%-85%
 Output voltage up to 7.5V
 Soft start delay: 2.2mS
 270KHz fixed frequency switching for amplifier and
500KHz for step up convertor
 2×3W Output at 10% THD with a 4 Ω Load and 5V
PVDD for amplifier
 2×5W Output at 1% THD with a 4 Ω Load and 7.5V
PVDD for amplifier
 2×6.5W Output at 10% THD with a 4 Ω Load and
7.5V PVDD for amplifier
 Filterless, Low Quiescent Current and Low EMI
 Amplifier Efficiency up to 85%
 Free LC filter digital modulation, direct-drive
speakers
 Short Circuit Protection
 Thermal Shutdown
 Few External Components to Save the Space and
cost
 Pb-Free Package
Marking Information
Applications
 Portable Bluetooth Speaker
 Cellular and Smart mobile phone
 Square Speaker
Device
Marking
Package
Shipping
LPA2162
LPS
ETSSOP-20 3K/REEL
LPA2162
YWX
Y: Y is year code. W: W is week code. X: X is series number.
LPA2162–00 May.-2013
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