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| SM6801A Datasheet, PDF (1/16 Pages) Nippon Precision Circuits Inc – Class-D Mono Amplifier for Portable Device | |||
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SM6801A
Class-D Mono Ampliï¬er for Portable Device
OVERVIEW
The SM6801A is an analog-input, class-D mono ampliï¬er. Class-D operation provides high efï¬ciency and low
power consumption. The device also incorporates an original real-time operation dynamic range compression
function that effectively suppresses the distortion in the saturation level region output by soft-clipping, boost-
ing the average sound pressure from the speaker during playback. It also incorporates an input equalizer pin for
output speaker frequency characteristics adjustment. These features make the device ideal for use in mobile
telephones and speaker applications requiring miniaturization and high-efï¬ciency. The output stage has a BTL
output conï¬guration where the output waveform inverts only the modulation components, enabling direct drive
connection, without using an LC ï¬lter, to a dynamic speaker. The device is available in miniature 16-pin QFN
packages, and requires only a peripheral chip capacitor to form a miniature ampliï¬er circuit.
FEATURES
I Operating supply voltage
⢠VDDS = 2.0 to 3.6V (input, logic)
⢠VDDP = 2.0 to 5.5V (output)
I Low current consumption: 4.2mA (VDD = 3.6V)
1.6mA (VDD = 2.4V)
I Output power: 0.7W (VDD = 3.6V, 8⦠load)
0.28W (VDD = 2.4V, 8⦠load)
I Output fundamental frequency: 125kHz
I Gain
⢠6dB (Normal)
⢠15dB to 6dB automatic adjustment in response
to the input level
(Dynamic range compression mode)
I Silicon-gate CMOS process
I Package: 16-pin QFN
APPLICATIONS
I Cellular phone
I PDA
I Digital still camera
ORDERING INFORMATION
PINOUT
(Top view)
VDD4
PDWN
VDD2
MUTEN
TESTN
VSS1
EQN
EQP
PACKAGE DIMENSIONS
(Unit: mm)
TOP VIEW
3.0 ± 0.08
B
A
BOTTOM VIEW
1.8
Device
SM6801AB
Package
16-pin QFN
0.02 S A B
S
0.2 S
C 0.3
0.22 ± 0.05 Ï 0.05 M S A B
0.05 S
0.5
SEIKO NPC CORPORATION â1
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