Datasheet

LM48310
www.ti.com SNAS430D –NOVEMBER 2007–REVISED MAY 2013
ELECTRICAL CHARACTERISTICS V
DD
= PV
DD
= 5V
(1)(2)
(continued)
The following specifications apply for A
V
= 12dB, (R
L
= 8Ω, SYNC_IN = V
DD
(Spread Spectrum mode), f = 1kHz, unless
otherwise specified. Limits apply for T
A
= 25°C.
LM48310
Units
Symbol Parameter Conditions
(Limits)
Typical
(3)
Limit
(4)(2)
V
IL
Logic Input Low Voltage SD input, V
DD
= 3.6V 0.4 V (max)
T
WU
Wake Up Time 7.5 ms
SYNC_IN = V
DD
(Spread Spectrum) 300±30 kHz
SYNC_IN = GND (Fixed Frequency) 300 kHz
SYNC_IN = External Clock
f
SW
Switching Frequency
200 kHz
Minimum Frequency
SYNC_IN = External Clock
1000 kHz
Maximum Frequency
11 dB (min)
A
V
Gain 12
13 dB (max)
R
IN
Input Resistance 20 17 kΩ (min)
R
L
= 4Ω, THD = 10%
f = 1kHz, 22kHz BW
V
DD
= 5V 2.6 W
V
DD
= 3.6V 1.3 W
V
DD
= 2.5V 555 mW
R
L
= 8Ω, THD = 10% (max)
f = 1kHz, 22kHz BW
V
DD
= 5V 1.6 W
V
DD
= 3.6V 800 mW
V
DD
= 2.5V 354 mW
P
O
Output Power
R
L
= 4Ω, THD = 1% (max)
f = 1kHz, 22kHz BW
V
DD
= 5V 2.1 W
V
DD
= 3.6V 1 W
V
DD
= 2.5V 446 mW
R
L
= 8Ω, THD = 1% (max)
f = 1kHz, 22kHz BW
V
DD
= 5V 1.3 1.1 W (min)
V
DD
= 3.6V 640 mW
V
DD
= 2.5V 286 mW
P
O
= 200mW, R
L
= 8Ω, f = 1kHz 0.03 % (max)
THD+N Total Harmonic Distortion + Noise
P
O
= 100mW, R
L
= 8Ω, f = 1kHz 0.03 %
V
RIPPLE
= 200mV
P-P
Sine,
f
RIPPLE
= 217Hz, Inputs AC GND, 82 dB
C
IN
= 1μF, Input referred
Power Supply Rejection Ratio
PSRR
(Input Referred)
V
RIPPLE
= 200mV
P-P
Sine,
f
RIPPLE
= 1kHz, Inputs AC GND, 80 dB
C
IN
= 1μF, Input referred
V
RIPPLE
= 1V
P-P
CMRR Common Mode Rejection Ratio 70 dB
f
RIPPLE
= 217Hz
V
DD
= 5V, P
OUT
= 1W
88 %
R
L
= 8Ω, f = 1kHz
η Efficiency
V
DD
= 3.6V, P
OUT
= 400mW
85 %
R
L
= 8Ω, f = 1kHz
V
DD
= 5V, P
O
= 1W,
97 dB
Fixed Frequency Mode
SNR Signal to Noise Ratio
V
DD
= 5V, P
O
= 1W,
97 dB
Spread Spectrum Mode
Input referred,
Fixed Frequency Mode, 14 μV
A-weighted Filter
ε
OS
Output Noise
Input referred,
Spread Spectrum Mode, 28 μV
Unweighted
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