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TS4974 Datasheet

1W Differential Audio Power Amplifier

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TS4974 pdf
TS4974
1W Differential Audio Power Amplifier
with Up/Down Digital Volume Control Pins
s Operating from VCC = 2.5V to 5.5V
s Zero pop&clickless circuit
s 1.W output power @ Vcc=5V, THD=1%,
F=1kHz, with 8Load
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
amplifierwww.DataSheet4U.com capable of delivering 380mW of
continuous RMS ouput power into a 8bridged-
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-
VIN+
BYPASS
STANDBY
GND
1
2
3
4
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
This is preliminary information on a new product now in development. Details are subject to change without notice.
1/8


STMicroelectronics Electronic Components Datasheet

TS4974 Datasheet

1W Differential Audio Power Amplifier

No Preview Available !

TS4974 pdf
TS4974
Absolute Maximum Ratings
1 Absolute Maximum Ratings
Table 1: Key parameters and their absolute maximum ratings
Symbol
Parameter
Value
Vcc Supply voltage 1
Vi
Toper
Tstg
Tj
Rthja
Input Voltage 2
Operating Free Air Temperature Range
Storage Temperature
Maximum Junction Temperature
Thermal Resistance Junction to Ambient 3
Pd Power Dissipation
ESD Human Body Model5
ESD Machine Model ( min Value )
Latch-up Latch-up Immunity
Lead Temperature (soldering, 10sec)
6
GND to VCC
-40 to + 85
-65 to +150
150
200
Internally Limited4
2
200
200
260
1) All voltages values are measured with respect to the ground pin.
2) The magnitude of input signal must never exceed VCC + 0.3V / GND - 0.3V.
3) Device is protected in case of over temperature by a thermal shutdown active @ 150°C.
4) Exceeding the power derating curves during a long period, may involve abnormal operating condition.
5) Human body model, 100pF discharged through a 1.5kOhm resistor, into pin to Vcc device.
Table 2: Operating Conditions
Unit
V
V
°C
°C
°C
°C/W
kV
V
mA
°C
Symbol
Parameter
Vcc
VSTB
Supply Voltage
Standby Voltage Input :
Device ON
Device OFF
VU/D
Volume control UP/DOWN voltage input:
UP/DOWN mode ON
UP/DOWN mode OFF
RL
TSD
Rthja
Load Resistor
Thermal Shutdown Temperature
Thermal Resistance Junction to Ambient 1
1) With Heat Sink Surface = 125mm2.
Value
2.5 to 5.5
Unit
V
1.5 VSTB VCC
GND VSTB 0.4
V
0 VU/D 30% of VCC
40% of VCC VU/D VCC
8
150
80
V
°C
°C/W
2/8


Part Number TS4974
Description 1W Differential Audio Power Amplifier
Maker STMicroelectronics
Total Page 8 Pages
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