STEVAL-CCA021V1 STMicroelectronics, STEVAL-CCA021V1 Datasheet - Page 23

• Manufacturer Part Number: STEVAL-CCA021V1
• Description: BOARD EVAL AUDIO FOR STM32F103
• Manufacturer: STMicroelectronics

Specifications of STEVAL-CCA021V1

• Amplifier Type: Class D
• Output Type: Mono jack connector, 2 terminal connectors, 2 RCA jacks
• Max Output Power X Channels @ Load: 2.2W x 1 or 2 @ 4 Ohm
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: STM32F103, TS4657(TS2012, TS4962, TS472)
• Description/function: Audio D/A
• Operating Supply Voltage: 3 V to 5.5 V
• Output Power: 2.8 W
• Product: Audio Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: TS4657
• Other names: 497-10338

UM0722
Figure 20. TS4962 mono Class-D amplifier functionality
9.8
left channel
Input from
the TS4657
GND
GND
100 nF
100 nF
SPK_STBY
C21
C22
1 µF
C24
TS2012 stereo Class-D power amplifier functionality
The TS2012 stereo audio Class-D amplifier is connected to the output of the TS4657 audio
DAC. The TS2012 input is configured in the single-ended configuration. The amplifier is able
to drive up to 1.35 W into a 8 Ω load at 5 V per channel. The device has four different gain
settings utilizing two discrete pins: G0 and G1. These pins are controlled by STM32 MCU in
the firmware. The gain is set to the minimal value by default thanks to the internal weak pull
down resistors. There are also two external pull down resistors R1, R2 which are useful
when utilizing the amplifier with a microcontroller. Two standby pins (active low) allow each
channel to be switched off independently (internal weak pull down resistors together with
external R9 and R10 are present). L1, L2, L3, L4, C8, C9, C30, C31 increase the EMI when
the external speakers are connected through long cables. The amplifier is powered from
+5 V supplied by from the controller board.
GND
150 kΩ
150 kΩ
Warning:
C25
100 nF
R14
R16
GND
5 V
R13
10 KΩ
ST: TS4962IQT
1
3
4
Mono Class-D amplifier
STBY
IN+
IN–
The maximum output power of the TS4962 mono amplifier is
2.2 W at 5 V into 4 Ω speaker and 1.4 W at 5 V into 8 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.
Oscillator
150
150
300
Internal
KΩ
KΩ
bias
KΩ
Doc ID 15867 Rev 1
2
Connectors and functionality of the TS4657 audio card
NC
PWM
V CCA
OUTPUT
BRIDGE
6
5 V
GNDA
H
7
GND
E-PAD
9
OUT+
OUT–
5
8
U3
BLM18EG221SN1
BLM18EG221SN1
Mono jack
L5
L6
Speaker
Lumberg 1503 06
GND
GND
100 pF
100 pF
C33
C32
KSSG1708
2 1
U6
AM00489
J4
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