STMicroelectronics 1.2 W fully differential audio power amplifier DEMOTS4995J DEMOTS4995J Data Sheet

March 2008

  Rev 3

1/26

26

1.2 W fully differential audio power amplifier

with selectable standby and 6 dB fixed gain

■

Differential inputs

■

90 dB PSRR @ 217 Hz with grounded inputs

■

Operates from V

CC

 = 2.5 V to 5.5 V

■

1.2 W rail-to-rail output power @ V

CC

=5 V, 

THD+N=1%, F=1 kHz, with an 8

Ω

 load

■

6 dB integrated fixed gain

■

Ultra-low consumption in standby mode 
(10 nA)

■

Selectable standby mode (active low or active 
high)

■

Ultra-fast startup time: 10 ms typ. at V

CC

=3.3 V

■

Available in 9-bump flip chip (300 mm bump 
diameter)

■

Ultra-low pop and click

■

Mobile phones (cellular / cordless)

■

PDAs 

■

Laptop / notebook computers

■

Portable audio devices

The TS4995 is an audio power amplifier capable 
of delivering 1.2 W of continuous RMS output 
power into an 8

Ω

 load at 5 V. Thanks to its 

differential inputs, it exhibits outstanding noise 
immunity.

An external standby mode control reduces the 
supply current to less than 10 nA. A STBY MODE 
pin allows the standby pin to be active high or 
low. An internal thermal shutdown protection is 
also provided, making the device capable of 
sustaining short-circuits.

The TS4995 features an internal fixed gain at 6dB 
which reduces the number of external 
components on the application board.

The device is equipped with common mode 
feedback circuitry allowing outputs to be always 
biased at V

CC

/2 regardless of the input common 

mode voltage.

The TS4995 is specifically designed for high 
quality audio applications such as mobile phones 
and requires few external components.

V

IN+

V

O-

V

CC

V

IN-

V

O+

Gnd

1

2

3

7

6

5

4

8

Bypass

Stdby

Stdby Mode

9

V

IN+

V

O-

V

CC

V

IN-

V

O+

Gnd

1

2

3

7

6

5

4

8

Bypass

Stdby

Stdby Mode

9