TS4961T datasheet(38/49 Pages) STMICROELECTRONICS

38 / 49 page

Application component information

TS4961T

38/49

4.5

Shutdown time (tSTBY)

When the standby command is set, the time required to put the two output stages into high

impedance and to put the internal circuitry in standby mode, is about 5 ms. This time is used

to decrease the gain and avoid any pop noise during shutdown.

4.6

Consumption in standby mode

Between the shutdown pin and GND there is an internal 300 k

Ωresistor. This resistor forces

the TS4961T to switch to standby mode when the standby input is left floating.

However, this resistor also introduces additional power consumption if the standby pin

voltage is not 0 V.

4.7

Single-ended input configuration

The TS4961Tcan be used in a single-ended input configuration, but input coupling

capacitors are necessary. Figure 76 shows a typical single-ended input application.

Figure 76.

Typical single-ended input application

All formulas are identical except for the gain (with Rin in kΩ) :

Due to the internal resistor tolerance, AVsingle is in the range of:

In the event that multiple single-ended inputs are summed, it is important that the

impedance on both TS4961 inputs (In- and In+) be equal.

Rin

GND

Vcc

SPEAKER

Cin

GND

Standby

In-

Stdby

In+

Out-

Out+

VCCA

GNDA

Internal

Bias

PWM

Output

Bridge

Oscillator

150k

300k

TS4961T(Audio Amplifier Part)

Csa

1uF

gle

sin

Out

–

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

300

----------

273

----------

gle

sin

327

----------

≤≤

Obsolete

Product(s)

- Obsolete

Product(s)

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