TS4995 Datasheet, PDF (1/26 Pages) STMicroelectronics – 1.2 W fully differential audio power amplifier with selectable standby and 6 dB fixed gain

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 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
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
V_O-
7
6
5 ^V_O+
Bypass _{8 9 4} Stdby
V_{IN+ 1}
2
3 ^V_IN-
V_CC 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 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.
March 2008
Rev 3
1/26
www.st.com
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