TS4855_04 Datasheet, PDF (18/27 Pages) STMicroelectronics – LOUDSPEAKER & HEADSET DRIVER WITH VOLUME CONTROL

TS4855
Electrical Characteristics
Figure 49: HDout SNR vs. power supply voltage,
unweighted filter, BW = 20 Hz to 20 kHz)
100
98
Vcc = 3V
96
Vcc = 5V
RL = 32Ω
94 _{G=+6dB and +12dB}
92 ^{Unweighted filter (20Hz to 20kHz)}
THD + N < 0.7%
90 _{Tamb = 25°C}
88
86
84
82
80
1
2
3
4
5
6
7
Output Mode
Figure 50: HDout SNR vs. power supply voltage,
weighted filter A, BW = 20 Hz to 20 kHz)
100
98
Vcc = 3V
96
Vcc = 5V
RL = 32Ω
94 _{G=+6dB and +12dB}
92 ^{Weighted filter A (20Hz to 20kHz)}
THD + N < 0.7%
90 _{Tamb = 25°C}
88
86
84
82
80
1
2
3
4
5
6
7
Output Mode
Figure 52: Power dissipation vs. output
power: speaker output
1.4
Vcc=5V
1.2 ^F=1kHz
THD+N<1%
1.0
RL=4Ω
0.8
0.6
0.4
RL=8Ω
0.2
RL=16Ω
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Power (W)
Figure 53: Power dissipation vs. output
power: speaker output
0.5
Vcc=3V
F=1kHz
0.4 ^THD+N<1%
RL=4Ω
0.3
0.2
0.1
0.0
0.0
RL=8Ω
RL=16Ω
0.1
0.2
0.3
0.4
0.5
Output Power (W)
Figure 51: Current consumption vs. power
supply voltage
10
Tamb = 25°C
9
8
7
6
Output mode 2 to 7
no loads
5
Output mode 2 to 7
RL=8Ω and 2x32Ω
4
3
2
Output mode 1
Output mode 1
1
RL=8Ω
no load
0
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Vcc (V)
Figure 54: Power dissipation vs. output power.
headphone output one channel
0.4
Vcc=5V
F=1kHz
THD+N<1%
0.3
0.2
RL=16Ω
0.1
RL=32Ω
0.0
0.00
0.05
0.10
0.15
0.20
0.25
Output Power (W)
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