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LM4670 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM4670
Description  Filterless High Efficiency 3W Switching Audio Amplifier
PDF  20 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4670 Datasheet(HTML) 4 Page - National Semiconductor (TI)

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Electrical Characteristics (Notes 1, 2)
The following specifications apply for A
V = 2V/V (RI = 150k
Ω), R
L =15µH+8
Ω + 15µH unless otherwise specified. Limits
apply for T
A = 25˚C. (Continued)
Symbol
Parameter
Conditions
LM4670
Units
(Limits)
Typical
Limit
(Note 6)
(Notes 7, 8)
P
O
Output Power (Note 11)
R
L =15µH+8
Ω + 15µH,
THD = 10% (max)
f = 1kHz, 22kHz BW
V
DD =5V
V
DD = 3.6V
V
DD = 2.5V
1.65
850
400
W
mW
mW
R
L =15µH+8
Ω + 15µH,
THD+N = 1% (max)
f = 1kHz, 22kHz BW
V
DD = 5V,
V
DD = 3.6V,
V
DD = 2.5V,
1.35
680
325
600
W
mW (min)
mW
THD+N
Total Harmonic Distortion + Noise
V
DD = 5V, PO =1WRMS,
f = 1kHz
0.35
%
V
DD = 3.6V, PO = 0.5WRMS,
f = 1kHz
0.30
%
V
DD = 3.6V, PO = 0.5WRMS,
f = 5kHz
0.30
%
V
DD = 3.6V, PO = 0.5WRMS,
f = 10kHz
0.30
%
V
DD = 3.6V,
V
Ripple = 200mVPP Sine,
f
Ripple = 217Hz
Inputs to AC GND, C
I = 0.1µ,
Input Referred
68
dB
PSRR
Power Supply Rejection Ratio
V
DD = 3.6V,
V
Ripple = 200mVPP Sine,
f
Ripple = 1kHz
Inputs to AC GND, C
I = 0.1µF
Input Referred
65
dB
V
DD = 3.6V,
V
Ripple = 200mVPP Sine,
f
Ripple = 217Hz
f
IN = 1kHz, PO = 10mWRMS
Input Referred
62
dB
SNR
Signal to Noise Ratio
V
DD = 5V, PO =1WRMS
93
dB
e
OUT
Output Noise
V
DD = 3.6V, f = 20Hz – 20kHz
Inputs to AC GND, C
I = 0.1µF
No Weighting, Input Referred
85
µV
RMS
V
DD = 3.6V, Inputs to AC GND
C
I = 0.1µF, A Weighted
Input Referred
65
µV
RMS
CMRR
Common Mode Rejection Ratio
V
DD = 3.6V, VRipple =1VPP Sine
f
Ripple = 217Hz, Input Referred
80
dB
T
WU
Wake-up Time
V
DD = 3.6V
1.35
ms
T
SD
Shutdown Time
V
DD = 3.6V
0.01
ms
www.national.com
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