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LM4927 데이터시트(PDF) 5 Page - Texas Instruments

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부품명 LM4927
상세설명  Audio Power Amplifier Series 2.5 Watt Fully Differential Audio Power Amplifier With Shutdown
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
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LM4927
www.ti.com
SNAS318A – JUNE 2005 – REVISED APRIL 2006
Electrical Characteristics VDD = 3V
(1) (2)
The following specifications apply for VDD = 3V, AV = 1, and 8Ω load unless otherwise specified. Limits apply for TA = 25°C.
LM4927
Units
Symbol
Parameter
Conditions
(Limits)
Typical(3)
Limit(4)
IDD
Quiescent Power Supply Current
VIN = 0V, no load
2
4.3
mA (max)
VIN = 0V, RL = 8Ω
2
4.3
ISD
Shutdown Current
VSHUTDOWN = GND
0.1
1
µA (max)
THD = 1% (max); f = 1 kHz
RL = 4Ω
0.650
RL = 8Ω
0.450
W
Po
Output Power
THD = 10% (max); f = 1 kHz
RL = 4Ω
0.800
RL = 8Ω
0.550
W
THD+N
Total Harmonic Distortion+Noise
Po = 0.25Wrms; f = 1kHz
0.04
%
Vripple = 200mV sine p-p
PSRR
Power Supply Rejection Ratio
f = 217Hz(5)
85
dB
f = 1kHz(5)
80
CMRR
Common-Mode Rejection Ratio
f = 217Hz, VCM = 200mVpp
60
dB
VOS
Output Offset
VIN = 0V
4
mV (max)
VSDIH
Shutdown Voltage Input High
1.4
V (min)
VSDIL
Shutdown Voltage Input Low
0.4
V (max)
TWU
Wake-up time from Shutdown
Cbypass
8
ms
(1)
All voltages are measured with respect to the ground pin, unless otherwise specified.
(2)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
(3)
Typicals are measured at 25°C and represent the parametric norm.
(4)
Limits are specified to Texas Instruments' AOQL (Average Outgoing Quality Level).
(5)
10
Ω terminated input.
External Components Description
(See Figure 1)
Components
Functional Description
1.
CS
Supply bypass capacitor which provides power supply filtering. Refer to the POWER SUPPLY BYPASSING section for
information concerning proper placement and selection of the supply bypass capacitor.
2.
CB
Bypass pin capacitor which provides half-supply filtering. Refer to the section, PROPER SELECTION OF EXTERNAL
COMPONENTS, for information concerning proper placement and selection of CB.
3.
Ri
Inverting input resistance which sets the closed-loop gain in conjunction with Rf.
4.
Rf
Internal feedback resistance which sets the closed-loop gain in conjunction with Ri.
Copyright © 2005–2006, Texas Instruments Incorporated
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