TS4855_04 Datasheet, PDF (16/27 Pages) STMicroelectronics – LOUDSPEAKER & HEADSET DRIVER WITH VOLUME CONTROL

TS4855
Electrical Characteristics
Figure 37: HDout frequency response
(Output modes 2, 3 G=+6dB)
6
5
Vcc=5V
Vcc=3V
4
3
Ouput mode 2, 3
RL = 32Ω
2
Cin=220nF
VinPHS=0.2Vrms
G=+6dB
1
BW < 125kHz
Tamb = 25°C
0
20
100
1000
Frequency (Hz)
10000
Figure 40: HDout -3dB lower cut-off frequency vs.
input capacitor (Output modes 2, 3, 4, 5, 6, 7)
40
Typical Input
30
Impedance
Phone In HS Input
Rin & Lin Inputs
All gain setting
Tamb=25°C
Minimum Input
Impedance
20
Maximum Input
Impedance
10
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Input Capacitor ( F)
Figure 38: HDout frequency response
(Output modes 4, 5 G=+12dB)
12
10
8
6
4
2
0
20
Vcc=5V
Vcc=3V
Ouput mode 4, 5
RL = 32Ω
Cin=220nF
VinR/L=0.2Vrms
G=+12dB
BW < 125kHz
Tamb = 25°C
100
1000
Frequency (Hz)
10000
Figure 39: Spkout -3dB lower cut off freq. vs.
input capacitor (Output modes 1, 3, 5, 7)
100
Typical Input
80
Impedance
Phone In IHF Input
Tamb=25°C
60
Minimum Input
Impedance
40
Maximum Input
Impedance
20
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Input Capacitor ( F)
Figure 41: HDout -3dB lower cut-off freq. vs.
gain setting (Output modes 2, 3, 4, 5, 6, 7)
100
Phone In Hs / Rin & Lin Inputs
Tamb=25°C
Cin=100nF
Cin=220nF
10
1
-34.5
-40.5
Cin=1µF
Cin=470nF
-20
0
12
-36
-6
6
Gain Setting (dB)
Figure 42: Power derating curves
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
Heat sink surface = 125mm²
No Heat sink
25
50
75
100
125
150
Ambiant Temperature ( C)
16/27