TS4962M_07 Datasheet, PDF (16/41 Pages) STMicroelectronics – 3W filter-free class D audio power amplifier

Electrical characteristic curves
4
Electrical characteristic curves
TS4962M
The graphs included in this section use the following abbreviations:
● R_L + 15μH or 30μH = pure resistor + very low series resistance inductor
● Filter = LC output filter (1µF+30µH for 4Ω and 0.5µF+60µH for 8Ω)
● All measurements done with C_s1=1µF and C_s2=100nF except for PSRR where Cs1 is
removed.
Figure 2. Test diagram for measurements
Vcc
1uF 100nF
Cs1 +
Cs2
Cin
GND GND
Rin
In+
150k
Out+
TS4962
Cin
Rin
In-
Out-
150k
GND
15uH or 30uH
or
LC Filter
4 or 8 Ohms
RL
5th order
50kHz low pass
filter
Audio Measurement
Bandwidth < 30kHz
Figure 3. Test diagram for PSRR measurements
100nF
Cs2 _{20Hz to 20kHz}
Vcc
4.7uF _Rin
150k
4.7uF _Rin
150k
GND
In+
Out+
TS4962
In-
Out-
GND
15uH or 30uH
or
LC Filter
4 or 8 Ohms
RL
5th order
50kHz low pass
filter
GND
5th order
50kHz low pass
filter
GND
Reference
RMS Selective Measurement
Bandwidth=1% of Fmeas
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