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PDF SM6801A Data sheet ( Hoja de datos )
| Número de pieza | SM6801A | |
| Descripción | Class-D Mono Amplifier | |
| Fabricantes | NPC | |
| Logotipo |  |
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SM6801A
Class-D Mono Amplifier for Portable Device
OVERVIEW
The SM6801A is an analog-input, class-D mono 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 16-pin QFN
packages, and requires only a peripheral chip capacitor to form a miniature amplifier 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, 8Ω load)
0.28W (VDD = 2.4V, 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: 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 φ 0.05 M S A B
0.05 S
0.5
SEIKO NPC CORPORATION —1
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SM6801A
AC Analog Characteristics
VDD1 = VDD2 = VDD3 = VDD4 = 3.6V, VSS1 = VSS2 = 0V, 0.708Vrms analog input amplitude, 1kHz input
signal frequency, Ta = 25°C, "Measurement Block Diagram", "Measurement Conditions", "Measurement Cir-
cuit", DRCN = PDWN = MUTEN = HIGH, unless otherwise noted.
Analog Input Characteristics (IN)
Standard voltage: VDD1 = VDD2 = VDD3 = VDD4 = 3.6V, VSS1 = VSS2 = 0V
Parameter
Reference input amplitude 1
Reference input amplitude 2
Input resistance
Input clipping voltage
Symbol
Conditions
VAI1
VAI2
RIN
VCLP
PO = 0.25W
PO = 0.05W
PO = 0.5W
Rating
min typ max
– 0.708 –
– 0.178 –
40 60 80
0.7 1 1.3
Unit
Vrms
Vrms
kΩ
Vrms
Low voltage: VDD1 = VDD2 = VDD3 = VDD4 = 2.4V, VSS1 = VSS2 = 0V
Parameter
Reference input amplitude 1
Reference input amplitude 2
Input resistance
Input clipping voltage
Symbol
Conditions
VAI1
VAI2
RIN
VCLP
PO = 42mW
PO = 8mW
PO = 100mW
min
–
–
40
0.38
Rating
typ
0.316
0.045
60
0.48
max
–
–
80
0.58
Unit
Vrms
Vrms
kΩ
Vrms
SEIKO NPC CORPORATION —5
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SM6801A
TYPICAL APPLICATION CIRCUITS
Dynamic Speaker
LC-type LPF Connection
OUTPUT
SOUND
GENERATOR IC
IN SPOUT POS
SM6801
SPOUT NEG
47µF
1µF
47µF
1µF
Direct Connection
OUTPUT
SOUND
GENERATOR IC
IN SPOUT POS
SM6801
SPOUT NEG
Dielectric Speaker
A dielectric speaker is capacitive in nature, and therefore requires output resistor connection.
OUTPUT
SOUND
GENERATOR IC
IN SPOUT POS
4Ω
SM6801
SPOUT NEG
4Ω
* Dielectric speaker
Taiyo Yuden MLS20070, MLS23070, MLS25070 or similar
*
SEIKO NPC CORPORATION —11
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| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet SM6801A.PDF ] | |
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