STA323WQS13TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STA323WQS13TR

2.1-channel high-efficiency digital audio system with QSound QHD®

STMicroelectronics 

STA323WQS

Electrical characteristics curves

Figure 15 shows the mono mode output power as a function of power supply voltages for

loads of 4, 6, 8 and 16 Ω. The same current limits as those given for Figure 14 apply, except

output current is 8 A minimum, with 12 A typical in the mono-bridge configuration. The solid

curves show typical performance and dashed curves depict the minimum current limit. The

output power curves assume proper thermal management of the power device internal

dissipation.

Figure 16. Half-bridge binary mode output power vs. supply, THD+N=10%

Output power (W)

25

20

15

Curves measured at

f = 1 kHz and using

a blocking capacitor

of 330 µF

4ohm

6ohm

10

8ohm

5

0

10 12 14 16 18

20 22 2

26

Power Supply Voltage (VDC)

Figure 16 shows the output power as a function of power supply voltages for loads of 4, 6,

and 8 Ω when the STA323WQS is operated in a half-bridge binary mode. The curves depict

typical performance. Minimum current limit is not reached for these combinations of voltage

and load impedance. The output power curves assume proper thermal management of the

power device internal dissipation.

Figure 17. Half-bridge binary mode output power vs. supply voltage, THD+N=1%

output power (W)

25

20

15

10

2 ohm

3 ohm

4 ohm

8 ohm

Curves measured at

f = 1 kHz and using

a blocking capacitor

of 330 µF

5

0

10

15

20

25

30

supply voltage (V)

23/78

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