TS4999 datasheet(28/36 Pages) STMICROELECTRONICS

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Application information

TS4999

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4.7

Consumption in shutdown mode

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

Ω (+-/20%) resistor. This

resistor forces the TS4999 to be in shutdown mode when the shutdown input is left floating.

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

shutdown pin voltage is not at 0 V.

With a 0.4 V shutdown voltage pin for example, you must add 0.4 V/300 k

Ω = 1.3 µA typical

(0.4 V/240 k

Ω = 1.66 µA in maximum) for each shutdown pin to the standby current

specified in Table 8, Table 9 and Table 10.

Of course, this current will be provided by the external control device for standby pins.

4.8

Single-ended input configuration

It is possible to use the TS4999 in a single-ended input configuration. Input coupling

capacitors are also mandatory in this configuration. The schematic diagram in Figure 59

shows a typical single-ended input application.

Figure 59.

Typical single-ended input application

TS4999

Left speaker

Right speaker

Cin

Left Input

Cin

Right Input

Standby C ontrol

VCC

CsL

1uF

0.1uF

Gain Select

Control

CsR

1uF

3D Effect

Control

VCC

Gain

Select

Oscillator

PWM

Gain

Select

Standby

Control

Protection

Circuit

Bridge

Lin+

Lin-

Rin+

Rin-

STBYL

STBYR

Lout+

Lout-

Rout+

Rout-

RPVCC

PGND

AGN D

AVCC

LPVC C

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