Application information

TS2007FC

22/28

4.7

Shutdown time

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

into high impedance and to put the internal circuitry in shutdown mode, is typically 1 ms.

This time is used to decrease the gain and avoid any pop noise during shutdown.

Note:

The gain decreases smoothly until the outputs are muted (see Figure 42 and Figure 43).

4.8

Consumption in shutdown mode

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

Ωresistor. This resistor forces

the TS2007 to be in shutdown when the shutdown input is left floating.

However, this resistor also introduces additional shutdown power consumption if the

shutdown pin voltage does not equal 0 V. This extra current is provided by the device that

drives the standby pin of the amplifier.

Referring to Table 2: Operating conditions on page 4, with a 0.4 V shutdown voltage pin for

example, you must add 0.4 V/300 k = 1.3 µA in typical (0.4 V/273 k = 1.46 µA maximum) to

the shutdown current specified in Table 5 to Table 9.

4.9

Single-ended input configuration

It is possible to use the TS2007 in a single-ended input configuration. However, input

coupling capacitors are needed in this configuration. The following schematic diagram

shows a typical single-ended input application.

Figure 44.

Typical application for single-ended input configuration

VCC

Cin

Cin

Input

Speaker

Cs

1uF

TS2007

Gain

Select

+

-

Standby

Control

A1

C1

A3

C3

PWM

H

Bridge

Oscillator

IN-

IN+

GS

Vcc

OUT+

OUT-

Standby

Gnd

Protection

Circuit

Gain select control

Standby control