Figure 21. Ts2012 Stereo Class-D Amplifier Functionality - ST STM32 User Manual

Connectors and functionality of the TS4657 audio card

Figure 21. TS2012 stereo Class-D amplifier functionality

GND GND
R1
10 KΩ
C11
220 nF
Input
G0
C12
from
G1
TS4657
220 nF
C13
GND
220 nF
C15
STBY_L
220 nF
STBY_R
GND
R9
10 KΩ
GND GND
Warning:
24/46
www.BDTIC.com/ST
C5
1 µF
GND GND GND
5 V
Gain control
9
R2
10 KΩ
AV
CC
L IN +
16
Gain
L IN –
17
select
15
G0
1
G1
R IN +
20
Gain
R IN –
19
select
7
STBY L
Standby
8
STBY R
control
AGND
R10
18
10 KΩ
Channel standby
GND
The maximum output power per channel of the TS2012 stereo
amplifier is 1.35 W at 5 V into 8 Ω speaker and 2.2 W at 5 V per
channel into 4 Ω speaker. Please take into consideration the
maximum current of the USB port which is typically 500 mA
(2.5 W). When the demonstration kit sinks more current from
the USB port, it is automatically disconnected from the PC. If
this happens just unplug and plug again your demonstration
kit.
Doc ID 15867 Rev 1
5 V
C6 C7
1 µF 100 nF
Stereo Class-D amplifier
5 V 5 V
U2
3 13
ST: TS2012IQT
PV CC
PV CC
L OUT+
H
PWM
bridge
L OUT–
Oscillator
R OUT+
H
PWM
bridge
R OUT–
PGND
PGND
E-PAD
4 12 21
GND
UM0722
GND
100 pF
C8
L1
P2
BLM18EG221SN1
1
2
2
L2
Terminal block
5
C9
BLM18EG221SN1
100 pF
GND
100 pF
14
C30
L3
P3
BLM18EG221SN1
2
11
1
L4
Terminal block
BLM18EG221SN1
C31
100 pF
GND
External
speakers
AM00490