STEVAL-CCA003V1 STMicroelectronics, STEVAL-CCA003V1 Datasheet - Page 24

• Manufacturer Part Number: STEVAL-CCA003V1
• Description: BOARD EVAL FOR LV TS4984IQT
• Manufacturer: STMicroelectronics

Specifications of STEVAL-CCA003V1

• Design Resources: STEVAL-CCA003V1 Gerber Files
• Amplifier Type: Class AB
• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 1W x 2 @ 8 Ohm
• Voltage - Supply: 2.2 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: TS4984
• Description/function: Audio Amplifiers
• Operating Supply Voltage: 2.2 V to 5.5 V
• Output Power: 1 W
• Product: Audio Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: TS4984
• Kit Application Type: Amplifier
• Application Sub Type: Stereo Audio Power Amplifier
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: TS4984
• Other names: 497-6396; STEVAL-CCA003V1

TS4984
4.9 Application example: Differential-input BTL power stereo amplifier
The schematic in
discussion, only the left-channel amplifier will be referred to.
Let:
The gain of the amplifier is:
In order to reach the optimal performance of the differential function, R
maximum.
Figure 69: Differential input amplifier configuration
24/29
R
C
1R
inR
= R
= C
2L
Pos. Input RIGHT
Neg. Input RIGHT
Neg. Input LEFT
Pos. Input LEFT
inL
= R
= C
Figure 69
1
, R
in
CinL
CinL
CinR
CinR
2R
= R
StandBy
Control
shows how to design the TS4984 to work in differential-input mode. For this
2L
R1L
R1R
R1R
R1L
R2L
R2R
= R
2
Cb
R2R
BypassR
StandBy
BypassL
R2L
IN-L
IN+L
IN+R
IN-R
G vdif = 2
+
-
+
-
Bias
VCC
×
R2
-------
R1
-
+
-
+
AV = -1
AV = -1
1
VO+R
VO-R
VO+L
VO-L
and R
TS4984
Application Information
2
should be matched at 1%
LEFT Speaker
8 Ohms
RIGHT Speaker
8 Ohms
Cs