STEVAL-CCA019V1 STMicroelectronics, STEVAL-CCA019V1 Datasheet - Page 24
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STEVAL-CCA019V1
Manufacturer Part Number
STEVAL-CCA019V1
Description
BOARD EVAL AUDIO AMP FOR TS4982
Manufacturer
STMicroelectronics
Specifications of STEVAL-CCA019V1
Amplifier Type
Class AB
Output Type
2-Channel (Stereo) with Stereo Headphones
Max Output Power X Channels @ Load
2W x 2 @ 4 Ohm; 125mW x 2 @ 16 Ohm
Voltage - Supply
5.0V
Operating Temperature
-40°C ~ 85°C
Board Type
Fully Populated
Utilized Ic / Part
TS4982
Description/function
Audio Amplifiers
Operating Supply Voltage
5 V
Output Power
2 W
Product
Audio Modules
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
TS4982
Other names
497-10339
Application information
4.10
4.11
4.12
24/31
Standby time
The time to disable the dedicated part into the standby mode since the level of the dedicated
standby pins are changed (HDEN from "1" to "0", SPKREN from "0" to "1") is called the
standby time. It is specified in the electrical characteristics in
Pop & click
Older generations of headphone drivers with single-ended outputs have a load connected in
series with a bulky capacitor (for instance 220 μF) to ground. With this type of configuration,
when the amplifier is turned on by a standby control pin, a time transient phenomena on the
load is present. This has been the main contribution to the unpleasant audible sound
currently called "pop effect".
Thanks to the negative charge pump the headphone outputs are referred to ground without
the need for bulky in-series capacitors. Therefore, the pop created by these bulky capacitors
is internally eliminated. In addition, the TS4982 include a pop & click circuitry which
suppresses any residual pop on the headphone and speaker outputs, thus enabling the
outputs to be virtually pop & click-free.
Headphone jack detection
The device incorporates a simple circuitry that can be used to enable the headphone
amplifier and disable the speaker amplifier by a headphone jack insertion.
Figure 45. Headphone jack detection schematics
Doc ID 14527 Rev 2
SPKREN
HDEN
RHP
LHP
GND
Vcc
100K
10K
HEADPHONE JACK
GND
Table 7 on page
7.
TS4982