TS4974 Datasheet, PDF (1/8 Pages) STMicroelectronics – 1W Differential Audio Power Amplifier with Up/Down Digital Volume Control Pins

TS4974
1W Differential Audio Power Amplifier
with Up/Down Digital Volume Control Pins
s Operating from V_CC = 2.5V to 5.5V
s Zero pop&clickless circuit
s 1.W output power @ Vcc=5V, THD=1%,
F=1kHz, with 8Ω Load
s Ultra low consumption in standby mode
(2µA max.)
s 85dB PSRR @ 217Hz
s 16 digital volume control steps
s Two up and down volume control discrete
pins
s Gain range from -33dB to + 12dB
s Integrated debouncing system
s Ultra fast start up time: 15ms typ.
s DFN10 3X3 mm pitch 0.5
PRODUCT PREVIEW
Pin Connections (top view)
TS4974IQ DFN Package
Description
At 3.3v, the TS4974 is a dual power audio
amplifier capable of delivering 380mW of
continuous RMS ouput power into a 8Ω bridged-
tied loads with 1% THD+N. An external standby
mode control reduces the supply current to less
than 2µA. An internal over-temperature shutdown
protection is provided.
The TS4974 has been designed for high quality
audio applications such as mobile phones and for
minimizing the number of external components.
The TS4974 features a 16 step digital volume
control through two discrete control Up and Down
pins. The start-up gain is internally fixed to -12dB.
An integrated debounce system prevents voltage
pikes on UP/DOWN pins during volume control
mode to be taken into account during a debounce
time of 10ms (typ.).
TS4974IQ - Pinout
VIN- ₁
VIN+ 2
BYPASS 3
STANDBY 4
GND 5
10 VCC
9 _VOUT-
8 VOUT+
7 _{UP / DVC}
6 DOWN / DVC
Applications
s Mobile phones (cellular / cordless)
s PDAs
Order Codes
Part Number
TS4974IQT
Temperature Range
-40, +85°C
s Laptop/notebook computers
s Portable audio devices
Package
QFN
Packaging
Tape & Reel
Marking
TBA
November 2004
Revision 1
1/8
This is preliminary information on a new product now in development. Details are subject to change without notice.