TS4962_10 Datasheet, PDF (19/44 Pages) STMicroelectronics – 2.8 W filter-free mono class D audio power amplifier

TS4962
Electrical characteristics
3.1
Electrical characteristics curves
The graphs shown in this section use the following abbreviations.
● R_L + 15 μH or 30 μH = pure resistor + very low series resistance inductor
● Filter = LC output filter (1 µF + 30 µH for 4 Ω and 0. 5µF + 60 µH for 8 Ω)
All measurements are done with C_S1 = 1 µF and C_S2 = 100 nF (see Figure 2), except for the
PSRR where C_S1 is removed (see Figure 3).
Figure 2. Schematic used for test 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.
Schematic used for PSSR 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
Doc ID 10968 Rev 8
19/44