U4083 TEMIC Semiconductors, U4083 Datasheet - Page 3

• Manufacturer Part Number: U4083
• Description: Low-Power Audio Amplifier for Telephone Applications
• Manufacturer: TEMIC Semiconductors

TELEFUNKEN Semiconductors
Rev. A2, 07-Apr-97
Pin 6: Supply and power dissipation
Power dissipation is shown in figures 8 to 10 for different
loads. Distortion characteristics are given in figures 11 to
13.
P
where
T
T
R
Power dissipated within the IC in a given application is
found from the following equation:
P
I
I
Absolute Maximum Ratings
Reference point Pin 7, T
Thermal Resistance
Operation Recommendation
Supply voltage
Voltages
Disabled
Output current
Junction temperature
Storage temperature range
Ambient temperature range
Power dissipation: T
Junction ambient
Supply voltage
Load impedance
Load current
Differential gain (5.0 kHz bandwidth)
Voltage @ CD Pin 1
Ambient temperature range
S
RMS
totmax
amb
tot
jmax
thJA
is obtained from figures 15
= (V
= Ambient temperature
is the RMS current at the load R
= Thermal resistance, junction-ambient
= Junction temperature = 140 C
+
S
T
@
jmax
I
R
S
) + (I
thJA
– T
amb
RMS
amb
amb
@
Parameters
Parameters
Parameters
= 60 C
V
= 25 C unless otherwise specified.
S
) – (R
L
Pin 6
Pins 1, 2, 3 and 4
Pins 5 and 8
Pins 5 and 8
Pin 6
Pins 5 to 8
Preliminary Information
@
L.
I
RMS
SO8
SO8
2
)
Operating range of the integrated circuit is defined with
a peak operating load current of
13). It is further specified with respect to different loads
in figure 14. The left (ascending) portion of each of the
three curves is defined by the power level at which 10%
distortion occurs. The center flat portion of each curve is
defined by the maximum output current capability of the
integrated circuit. The right (descending) portion of each
curve is defined by the maximum internal power dissipa-
tion of the IC at 25 C. At higher ambient temperatures,
the maximum load power must be reduced according to
the above mentioned equation.
Layout Considerations
Normally a snubber is not needed at the output of the IC,
unlike many other audio amplifiers. However, the PC
board layout, stray capacitances, and the manner in which
the speaker wires are configured, may dictate otherwise.
Generally the speaker wires should be twisted tightly, and
be not more than a few cm (or inches) in length.
Symbol
Symbol
Symbol
R
T
T
V
T
P
D
V
V
R
T
amb
thJA
I
amb
stg
CD
tot
L
G
L
S
S
j
–1.0 to (VS +1.0)
–1.0 to (VS +1.0)
–55 to +150
–1.0 to +18
–20 to +70
–20 to +70
8.0 to 100
2 to 16
0 to 46
"
"
Value
Value
Value
+140
440
180
VS
250
200
"
U4083B
200 mA (figures 8 to
K/W
Unit
mW
Unit
Unit
mA
mA
dB
V
V
V
V
W
V
C
C
C
C
3 (11)