STA381BWS datasheet(55/174 Pages) STMICROELECTRONICS

Teilenummer	STA381BWS

Bauteilbeschribung	Sound Terminal 2.1-channel high-efficiency digital audio system

PDF	174 Pages

Scroll/Zoom	100%

Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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55 / 174 page

DocID018937 Rev 7

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STA381BWS

For each configuration the PWM signals from the digital driver are mapped in different ways

to the power stage.

2.0 channels, two full-bridges (OPER = 00)



FFX1A -> OUT1A



FFX1B -> OUT1B



FFX2A -> OUT2A



FFX2B -> OUT2B



FFX3A -> OUT3A



FFX3B -> OUT3B



FFX4A -> OUT4A



FFX4B -> OUT4B



FFX1A/1B configured as ternary



FFX2A/2B configured as ternary



FFX3A/3B configured as line out ternary



FFX4A/4B configured as line out ternary

On channel 3 line out (LOC bits = 00, reg 0x17 bit D7,D6) the same data as channel 1

processing is sent. On channel 4 line out (LOC bits = 00) the same data as channel 2

processing is sent. In this configuration, neither volume control nor EQ has any effect on

channels 3 and 4.

In this configuration the PWM slot phase is the following as shown in Figure 23.

Figure 23. 2.0 channels (OPER = 00) PWM slots

OUT1A

OUT1B

OUT2A

OUT2B

OUT3A

OUT3B

OUT4A

OUT4B

OUT1A

OUT1B

OUT2A

OUT2B

OUT3A

OUT3B

OUT4A

OUT4B

Obsolete

Product(s)

- Obsolete

Product(s)

STA381BWS Datenblatt(PDF) 55 Page - STMicroelectronics

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