TS4975

Application Information

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4.8

Startup time

When the TS4975 is controlled to switch from full standby (output mode 0) to another output

startup time will be always lower.

In

Figure 63. Typical startup time versus bypass capacitance

4.9

Pop and click performance

The TS4975 has internal pop and click reduction circuitry which eliminates the output

transients, for example during switch-on or switch-off phases, during a switch from an output

mode to another or during change in volume. The performance of this circuitry is closely linked

The TS4975 is optimized to have a low pop and click in the typical schematic configuration (see

During the device start-up period when the pop and click reduction is active, the value $Fxh

(1111xxxx binary) can be read from the internal device registry.

Once the device is fully operational and the pop and click is inactive, the last value of control

register can be read.

t

wu

C

b

V

CC

V

CC

1.2

–

-------------------------

×

50000

0.008 s

()

+

×

=

0.4

0.8

1.2

1.6

2.0

2.4

2.8

3.2

3.6

4.0

0

50

100

150

200

250

300

350

400

Vcc=2.5V

Vcc=3.3V

Bypass capacitor Cb (

Vcc=5V