sta323wqs STMicroelectronics, sta323wqs Datasheet - Page 17

• Manufacturer Part Number: sta323wqs
• Description: 2.1-channel High-efficiency Digital Audio System With Qsound Qhd??
• Manufacturer: STMicroelectronics

STA323WQS
4
4.1
Electrical characteristics curves
Output power against supply voltage
Figure 13. Stereo mode - output power against supply voltage, THD+N = 10%
Figure 13
as a function of power supply voltage for 4, 6, and 8 Ω loads in either DDX® mode or binary
full bridge mode. Output power is constrained for higher impedance loads by the maximum
voltage limit of the STA323WQS and by the over-current protection limit for lower impedance
loads. The minimum threshold for the over-current protection circuit of the STA323WQS is
4 A (at 25 ºC) but the typical threshold is 6 A for the device. The solid curves shows the
typical output power capability of the device. The dotted curves shows the output power
capability constrained to the minimum current specification of the STA323WQS. The output
power curves assume proper thermal management of the power device's internal
dissipation.
Figure 14. Output power vs. supply for stereo bridge (THD+N=1%
shows the full-scale output power (0dB FS digital input with unity amplifier gain)
8 0
7 0
6 0
5 0
4 0
3 0
2 0
1 0
6 0
5 0
4 0
3 0
2 0
1 0
0
O u tp u t p o w e r (W )
o u tp u t p o w e r (W ) - B T L 1 % T H D
1 0
1 0
1 2
1 4
P o w e r S u p p ly V o lta g e (V D C )
1 5
1 6
s u p p ly v o lta g e (V )
2 0
1 8
4 o h m
4 o h m
2 0
2 5
2 2
6 o h m
Electrical characteristics curves
1 6 o h m
6 o h m
8 o h m
2 4
3 0
8 o h m
2 6
)
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