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STMicroelectronics Electronic Components Datasheet

TS4994FC Datasheet

1.2W differential input/output audio power amplifier

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TS4994FC
1.2 W differential input/output audio power amplifier
with selectable standby
Features
Differential inputs
Near-zero pop & click
100dB PSRR @ 217Hz with grounded inputs
Operating range from VCC = 2.5V to 5.5V
1.2W rail-to-rail output power @ VCC = 5V,
THD = 1%, F = 1kHz, with 8Ω load
90dB CMRR @ 217Hz
Ultra-low consumption in standby mode (10nA)
Selectable standby mode (active low or active
high)
Ultra fast startup time: 15ms typ.
Available in 9-bump flip-chip (300mm bump
diameter)
Lead-free package
TS4994EIJT - Flip-chip (9 bumps)
Gnd
VO- 7 6 5 VO+
Bypass 8 9 4 Stdby
VIN+ 1 2 3 VIN-
VCC Stdby Mode
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.
Description
The TS4994 is an audio power amplifier capable
of delivering 1W of continuous RMS output power
into an 8Ω load @ 5V. Due to its differential inputs,
it exhibits outstanding noise immunity.
An external standby mode control reduces the
supply current to less than 10nA. An STBY
MODE pin allows the standby to be active HIGH
or LOW. An internal thermal shutdown protection
is also provided, making the device capable of
sustaining short-circuits.
The TS4994 is designed for high quality audio
applications such as mobile phones and requires
few external components.
Applications
Mobile phones (cellular / cordless)
Laptop / notebook computers
PDAs
Portable audio devices
Order codes
Part number
Temperature range
Package
Packaging
Marking
TS4994EIKJT
TS4994EIJT
-40°C, +85°C
FC9 with back
coating
Lead free flip-chip9
Tape & reel
A94
A94
December 2006
Rev 2
1/35
www.st.com
35


STMicroelectronics Electronic Components Datasheet

TS4994FC Datasheet

1.2W differential input/output audio power amplifier

No Preview Available !

Contents
Contents
TS4994FC
1 Application component information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.1 Differential configuration principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2 Gain in typical application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.3 Common mode feedback loop limitations . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.4 Low and high frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.5 Calculating the influence of mismatching on PSRR performance . . . . . . 25
4.6 CMRR performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.7 Power dissipation and efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.8 Decoupling of the circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.9 Wake-up time: tWU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.10 Shutdown time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.11 Pop performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.12 Single-ended input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2/35


Part Number TS4994FC
Description 1.2W differential input/output audio power amplifier
Maker STMicroelectronics
Total Page 30 Pages
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