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STMicroelectronics Electronic Components Datasheet

TS4995 Datasheet

1.2 W fully differential audio power amplifier

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TS4995
1.2 W fully differential audio power amplifier
with selectable standby and 6 dB fixed gain
Features
Differential inputs
90 dB PSRR @ 217 Hz with grounded inputs
Operates from VCC = 2.5 V to 5.5 V
1.2 W rail-to-rail output power @ VCC=5 V,
www.DataSheTeHt4DU+.cNom=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 VCC=3.3 V
Available in 9-bump flip chip (300 mm bump
diameter)
Ultra-low pop and click
Applications
Mobile phones (cellular / cordless)
PDAs
Laptop / notebook computers
Portable audio devices
Description
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.
TS4995 - Flip chip 9
Pin connections (top view)
Gnd
VO- 7 6 5 VO+
Bypass 8 9 4 Stdby
VIN+ 1 2 3 VIN-
VCC Stdby Mode
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 VCC/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.
March 2008
Rev 3
1/26
www.st.com
26


STMicroelectronics Electronic Components Datasheet

TS4995 Datasheet

1.2 W fully differential audio power amplifier

No Preview Available !

Contents
Contents
TS4995
1 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3
2 Typical application schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Differential configuration principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
www.DataSheet4U.com 4.2
4.3
Common mode feedback loop limitations . . . . . . . . . . . . . . . . . . . . . . . . . 17
Low frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4 Power dissipation and efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5 Decoupling of the circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.6 Wake-up time tWU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.7 Shutdown time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.8 Pop performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.9 Single-ended input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2/26


Part Number TS4995
Description 1.2 W fully differential audio power amplifier
Maker STMicroelectronics
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TS4995 Datasheet PDF






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