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LM48511 bảng dữ liệu(PDF) 7 Page - Texas Instruments

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tên linh kiện LM48511
Giải thích chi tiết về linh kiện  Mono, Class D Audio Power Amplifier
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LM48511 bảng dữ liệu(HTML) 7 Page - Texas Instruments

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ÌLM48511
www.ti.com
SNAS416H – JULY 2007 – REVISED AUGUST 2015
6.7 Electrical Characteristics VDD = 3 V
The following specifications apply for VDD = 3 V, PV1 = 4.8 V (continuos mode), AV = 2V/V, R3 = 25.5 kΩ, RLS = 9.31 kΩ,
RL = 8 Ω, f = 1 kHz, SS/FF = GND, unless otherwise specified. Limits apply for TA = 25°C.
(1)
PARAMETER
TEST CONDITIONS
MIN
TYP(2)
MAX
UNIT
Fixed Frequency Mode (FF)
9
mA
Quiescent Power Supply
IDD
VIN = 0, RLOAD = ∞
Current
Spread Spectrum Mode (SS)
9.5
mA
ISD
Shutdown Current(3)
VSD_BOOST = VSD_AMP = SS = FB_SEL = GND
0.01
1
μA
VIH
Logic Voltage Input High
0.91
V
VIL
Logic Voltage Input Low
0.79
V
TWU
Wake-up Time
CSS = 0.1μF
49
ms
VOS
Output Offset Voltage(4)
0.04
mV
RL = 8 Ω, f = 1 kHz,
FF
1
BW = 22 kHz
W
SS
0.84
1
THD+N = 1%
RL = 8 Ω, f = 1 kHz,
FF
1.3
BW = 22 kHz
W
SS
1.3
THD+N = 10%
PO
Output Power
RL = 4 Ω, f = 1 kHz,
FF
1.8
BW = 22 kHz
W
SS
1.8
THD+N = 1%
RL = 4 Ω, f = 1 kHz,
FF
2.2
BW = 22 kHz
W
SS
2.2
THD+N = 10%
FF
0.02%
PO = 500 mW, f = 1 kHz,
RL = 8 Ω
SS
0.03%
Total Harmonic
THD+N
Distortion + Noise
FF
0.04%
PO = 500 mW, f = 1 kHz,
RL = 4 Ω
SS
0.06%
f = 20Hz to 20kHz
FF
35
Inputs to AC GND, No
µVRMS
SS
35
weighting
εOS
Output Noise
f = 20 Hz to 20 kHz
FF
25
Inputs to AC GND, A
µVRMS
SS
25
weighted
VRIPPLE = 200 mVP-P
FF
89
Sine,
dB
SS
89
fRIPPLE = = 217 Hz
Power Supply Rejection
VRIPPLE = 200 mVP-P
FF
88
PSRR
Ratio
Sine,
dB
SS
88
(Input Referred)
fRIPPLE = = 1 kHz
VRIPPLE = 200 mVP-P
FF
78
Sine,
dB
SS
78
fRIPPLE = = 10 kHz
Common-Mode
CMRR
Rejection Ratio
VRIPPLE = 1 VP-P, fRIPPLE = 217 Hz
71
dB
(Input Referred)
η
Efficiency
f = 1 kHz, RL = 8 Ω, PO = 1 W
75%
Feedback Pin Reference
VFB
1.23
V
Voltage(5)
(1)
RL is a resistive load in series with two inductors to simulate an actual speaker load for RL = 8Ω, the load is 15μH+8Ω+15μH. For
RL = 4 Ω, the load is 15 μH + 4 Ω + 15 μH.
(2)
Typical values represent most likely parametric norms at TA = +25ºC, and at the Recommended Operation Conditions at the time of
product characterization and are not specified.
(3)
Shutdown current is measured with components R1 and R2 removed.
(4)
Offset voltage is determined by: (IDD (with load) — IDD (no load)) x RL.
(5)
Feedback pin reference voltage is measured with the Audio Amplifier disconnected from the Boost converter (the Boost converter is
unloaded).
Copyright © 2007–2015, Texas Instruments Incorporated
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