STEVAL-CCA019V1 STMicroelectronics, STEVAL-CCA019V1 Datasheet - Page 24

• 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