STEVAL-CCA012V1 STMicroelectronics, STEVAL-CCA012V1 Datasheet - Page 23
![BOARD EVAL BASED ON TS2007](/photos/9/12/91230/steval-cca012v1_sml.jpg)
STEVAL-CCA012V1
Manufacturer Part Number
STEVAL-CCA012V1
Description
BOARD EVAL BASED ON TS2007
Manufacturer
STMicroelectronics
Specifications of STEVAL-CCA012V1
Amplifier Type
Class D
Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
2.8W x 1 @ 4 Ohm
Voltage - Supply
2.4 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Board Type
Fully Populated
Utilized Ic / Part
TS2007
Description/function
Audio Amplifiers
Operating Supply Voltage
2.4 V to 5.5 V
Output Power
3 W
Product
Audio Modules
Silicon Manufacturer
ST Micro
Silicon Core Number
TS2007
Kit Application Type
Amplifier
Application Sub Type
Audio Power Amplifier
Kit Contents
Board
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
TS2007
Other names
497-9004
TS2007
4.5
4.6
Note:
So, for a desired cut-off frequency F
with F
The input impedance Z
is also a tolerance around the typical value (see
tolerance, you can also calculate tolerance of the F
●
●
Decoupling of the circuit
A power supply capacitor, referred to as C
The TS2007 has a typical switching frequency of 280kHz and output fall and rise time about
5ns. Due to these very fast transients, careful decoupling is mandatory.
A 1µF ceramic capacitor is enough, but it must be located very close to the TS2007 in order
to avoid any extra parasitic inductance created by a long track wire. Parasitic loop
inductance, in relation with di/dt, introduces overvoltage that decreases the global efficiency
of the device and may cause, if this parasitic inductance is too high, a TS2007 breakdown.
In addition, even if a ceramic capacitor has an adequate high frequency ESR value, its
current capability is also important. A 0603 size is a good compromise, particularly when a
4Ω load is used.
Another important parameter is the rated voltage of the capacitor. A 1µF/6.3V capacitor
used at 5V, loses about 50% of its value. With a power supply voltage of 5V, the decoupling
value, instead of 1µF, could be reduced to 0.5µF. As C
THD+N in the medium to high frequency region, this capacitor variation becomes decisive.
In addition, less decoupling means higher overshoots which can be problematic if they reach
the power supply AMR value (6V).
Wake-up time (t
When the standby is released to set the device ON, there is a wait of 5ms typically. The
TS2007 has an internal digital delay that mutes the outputs and releases them after this
time in order to avoid any pop noise.
The gain increases smoothly (see
pin
(Section
F
F
CLmax
CLmin
CL
in Hz, Z
=
=
4.2).
0.915
1.103
in
in Ω and C
⋅
⋅
F
F
CL
in
CL
wu
is for the whole power supply voltage range, typically 75k
)
in
in F.
Figure
F
C
CL
CL
in
=
we can calculate C
=
--------------------------------------------- -
2
------------------------------------------- -
2
49) from the mute to the gain selected by the GS
S,
⋅
⋅
is needed to correctly bypass the TS2007.
π
π
⋅
⋅
Z
1
1
Table 5
Z
in
in
CL
⋅
⋅
F
:
C
S
CL
in
has particular influence on the
to
in
Table
:
9). With regard to the
Application information
Ω
. There
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