STEVAL-CCA008V1 STMicroelectronics, STEVAL-CCA008V1 Datasheet - Page 25

BOARD EVAL BASED ON TS4998

STEVAL-CCA008V1

Manufacturer Part Number
STEVAL-CCA008V1
Description
BOARD EVAL BASED ON TS4998
Manufacturer
STMicroelectronics
Datasheets

Specifications of STEVAL-CCA008V1

Amplifier Type
Class AB
Output Type
2-Channel (Stereo)
Max Output Power X Channels @ Load
1W x 2 @ 8 Ohm
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Board Type
Fully Populated
Utilized Ic / Part
TS4998
Description/function
Audio Amplifiers
Operating Supply Voltage
2.7 V to 5.5 V
Output Power
1 W
Product
Audio Modules
Silicon Manufacturer
ST Micro
Silicon Core Number
TS4998
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
TS4998
Other names
497-8259
TS4998
4.7
4.8
Footprint recommendation
Footprint soldering pad dimensions are given in
previous section, the maximum allowable value for ambient temperature is dependent on
the thermal resistance junction to ambient R
power dissipation.
Based on best thermal performance, it is recommended to use 4-layer PCBs with vias to
effectively remove heat from the device. It is also recommended to use vias for 2-layer PCBs
to connect the package exposed pad to heatsink cooper areas placed on another layer.
For proper thermal conductivity, the vias must be plated through and solder-filled. Typical
thermal vias have the following dimensions: 1.2mm pitch, 0.3mm diameter.
Figure 65. QFN16 footprint recommendation
Decoupling of the circuit
Two capacitors are needed to correctly bypass the TS4998: a power supply bypass
capacitor C
The C
and an indirect influence on power supply disturbances. With a value for C
expect THD+N performance similar to that shown in the datasheet.
In the high frequency region, if C
disturbances on the power supply rail are less filtered.
On the other hand, if C
rail are more filtered.
The C
PSRR performance (with grounded input and in the lower frequency region).
S
b
capacitor has an influence on the THD+N at lower frequencies, but also impacts
capacitor has particular influence on the THD+N at high frequencies (above 7kHz)
S
and a bias voltage bypass capacitor C
S
is greater than 1µF, then those disturbances on the power supply
S
is lower than 1µF, then THD+N increases and
THJA
Figure 72 on page
. Decreasing the R
b
.
Application information
THJA
30. As discussed in the
value causes better
S
of 1µF, one can
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