SM6802A Datasheet, PDF (1/15 Pages) Nippon Precision Circuits Inc – Class-D Stereo Amplifier for Portable Device

SM6802A
Class-D Stereo Amplifier for Portable Device
OVERVIEW
The SM6802A is an analog-input, class-D stereo amplifier. Class-D operation provides high efficiency 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-efficiency. The output stage has a BTL
output configuration where the output waveform inverts only the modulation components, enabling direct drive
connection, without using an LC filter, 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 amplifier circuit.
FEATURES
I Operating supply voltage: 2.7 to 5.5V
I Low current consumption: 6mA
(VDD1 = VDD2 = VDD3 = 3.6V)
I Output power: 0.7W + 0.7W
(VDD1 = VDD2 = VDD3 = 3.6V, 8Ω 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: 20-pin QFN
PINOUT
(Top view)
20 19 18 17 16
LEQP 1
LIN 2
VDD1 3
RIN 4
REQP 5
15 VDD3
14 LOUTP
13 VSS2
12 ROUTP
11 VDD2
6 7 8 9 10
APPLICATIONS
I Cellular phone
I PDA
I Digital still camera
ORDERING INFORMATION
PACKAGE DIMENSIONS
(Unit: mm)
4.20 ± 0.20
4.00 ± 0.10
Device
Package
SM6802AB
20-pin QFN
1
0.50
0.60 ± 0.10
0.05
0.22 ± 0.05
0.05 M
NIPPON PRECISION CIRCUITS INC.—1