DEMOTS4956J STMicroelectronics, DEMOTS4956J Datasheet - Page 46

• Manufacturer Part Number: DEMOTS4956J
• Description: BOARD DEMO TS4956EIJT/EIKJT
• Manufacturer: STMicroelectronics

Specifications of DEMOTS4956J

• Amplifier Type: Class AB
• Output Type: 1-Channel (Mono) with Mono and Stereo Headphones
• Max Output Power X Channels @ Load: 1W x 1 @ 8 Ohm; 43mW x 2 @ 32 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: TS4956
• Description/function: Audio Amplifiers
• Operating Supply Voltage: 2.7 V to 5.5 V
• Product: Audio Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: TS4956
• Other names: 497-6381; DEMOTS4956J

TS4956
4.6
4.7
Decoupling of the circuit
Two capacitors are needed to properly bypass the TS4956 — a power supply capacitor C
and a bias voltage bypass capacitor C
C
the power supply disturbances.
With a C
those shown in the datasheet.
If C
supply rail are less filtered.
On the contrary, if C
filtered.
C
final result of PSRR with inputs grounded at lower frequencies:
The value of C
Power-on reset
When power is applied to V
(shutdown) until the supply voltage reaches its nominal value. The power-on reset has a
typical threshold of 1.75 V.
During this reset state the output configuration is the same as in the shutdown mode.
s
b
has a strong influence on the THD+N at high frequencies (above 7 kHz) and indirectly on
has an influence on THD+N at lower frequencies, but its value has critical impact on the
s
is lower than 1 μF, THD+N increases in high frequency and disturbances on power
s
●
●
value of about 1 μF, you can expect to obtain THD+N performances similar to
If C
worsens upwards.
If C
frequency range is small.
b
also has an influence on startup time.
b
b
is lower than 1 μF, THD+N increases at lower frequencies and the PSRR
is higher than 1 μF, the benefit on THD+N and PSRR in the lower
s
is higher than 1 μF, disturbances on the power supply rail are more
CC
, an internal power-on reset holds the TS4956 in a reset state
b
.
Application information
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