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| SM6800A Datasheet, PDF (1/12 Pages) Nippon Precision Circuits Inc – Class-D Mono Amplifier for Mobile Telephones | |||
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SM6800A
Class-D Mono Ampliï¬er for Mobile Telephones
OVERVIEW
The SM6800A is an analog-input, class-D mono ampliï¬er. Class-D operation provides high efï¬ciency and low
power consumption. The device also incorporates a selectable 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 20-pin QFN
packages, and requires only a peripheral chip capacitor to form a miniature ampliï¬er circuit.
FEATURES
I Operating supply voltage: 2.7 to 4.3V
I Low current consumption: 4.8mA (VDD = 3.6V)
I Output power: 0.7W (VDD = 3.6V, 8⦠load)
I Output fundamental frequency: 125kHz
I Gain
⢠4.5dB (Normal)
⢠12dB to 4.5dB automatic adjustment in
response to the input level
(Dynamic range compression mode)
I Silicon-gate CMOS process
I Package: 20-pin QFN
PINOUT
(Top view)
20 19 18 17 16
VDD1 1
IN 2
EQP 3
EQN 4
VSS1 5
15 VDD3
14 OUTP
13 VSS2
12 OUTN
11 VDD2
6 7 8 9 10
APPLICATIONS
I Cellular phone
I PDA
I Digital still camera
ORDERING INFORMATION
Device
SM6800AB
Package
20-pin QFN
PACKAGE DIMENSIONS
(Unit: mm)
4.20 ± 0.20
4.00 ± 0.10
1
0.50
0.60 ± 0.10
0.05
0.22 ± 0.05
0.05 M
NIPPON PRECISION CIRCUITS INC.â1
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