TDA2050V STMicroelectronics, TDA2050V Datasheet - Page 10

• Manufacturer Part Number: TDA2050V
• Description: IC AMP AUDIO PWR HIFI PENTAWATT5
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA2050V

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 35W x 1 @ 4 Ohm
• Voltage - Supply: 9 V ~ 50 V, ±4.5 V ~ 25 V
• Features: Short-Circuit and Thermal Protection
• Mounting Type: Through Hole
• Package / Case: Pentawatt-5 (Vertical, Bent and Staggered Leads)
• Product: Class-AB
• Output Power: 50 W
• Available Set Gain: 80 dB
• Thd Plus Noise: 0.03 %
• Operating Supply Voltage: 25 V
• Supply Current: 90 mA
• Maximum Power Dissipation: 25000 mW
• Maximum Operating Temperature: + 150 C
• Mounting Style: Through Hole
• Audio Load Resistance: 8 Ohms
• Dual Supply Voltage: +/- 5 V, +/- 9 V, +/- 12 V, +/- 15 V, +/- 18 V, +/- 24 V
• Input Bias Current (max): 0.5 uA
• Input Offset Voltage: 15 mV
• Input Signal Type: Differential
• Minimum Operating Temperature: - 40 C
• Output Signal Type: Single
• Supply Type: Dual
• Amplifier Class: AB
• No. Of Channels: 1
• Supply Voltage Range: ± 4.5V To ± 25V
• Load Impedance: 4ohm
• Operating Temperature Range: -40°C To +150°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-3028-5

TDA2050
ent. Fig. 17 shows this dissipable power as a
function of ambient temperature for different ther-
mal resistance.
Figure 17: Maximum Allowable Power Dissipa-
MOUNTING INSTRUCTIONS
The power dissipated in the circuit must be re-
moved by adding an external heatsink.
Thanks to the PENTAWATT package, the
heatsink mounting operation is very simple, a
screw or a compression spring (clip) being suffi-
A.1 - MUSIC POWER CONCEPT
MUSIC POWER is (according to the IEC clauses
n.268-3 of Jan 83) the maximum power which the
amplifier is capable of producing across the rated
load resistance (regardless of non linearity) 1 sec
after the application of a sinusoidal input signal of
frequency 1 KHz.
According to this definition our method of meas-
urement comprises the following steps:
10/13
- Set the voltage supply at the maximum oper-
- Apply a input signal in the form of a 1KHz tone
- The output voltage is measured 1 sec from the
- Increase the input voltage until the output sig-
- The music power is then V
ating value;
burst of 1 sec duration: the repetition period
of the signal pulses is 60 sec;
start of the pulse;
nal shows a THD=10%;
Vout is the output voltage measured in the
condition of point 4 and RL is the rated load
impedance;
tion vs. Ambient Temperature
2
out
/RL, where
APPENDIX A
cient. Between the heatsink and the package is
better to insert a layer of silicon grease, to opti-
mize the thermal contact; no electrical isolation is
needed between the two surfaces. Fig. 18 shows
an example of heatsink.
Dimension suggestion
The following table shows the length that the
heatsink in fig. 18 must have for several values
of Ptot and Rth.
Figure 18: Example of heat-sink
The target of this method is to avoid excessive
dissipation in the amplifier.
A.2 - INSTANTANEOUS POWER
Another power measurement (MAXIMUM IN-
STANTANEOUS OUTPUT POWER) was pro-
posed by IEC in 1988 (IEC publication 268-3 sub-
clause 19.A).
We give here only a brief extract of the concept,
and a circuit useful for the measurement.
The supply voltage is set at the maximum operat-
ing value.
The test signal consists of a sinusoidal signal
whose frequency is 20 Hz, to which are added al-
ternate positive and negative pulses of 50 s du-
ration and 500 Hz repetition rate. The amplitude
of the 20 Hz signal is chosen to drive the amplifier
to its voltage clipping limits, while the amplitude of
the pulses takes the amplifier alternately into its
current-overload limits.
P
Lenght of heatsink (mm)
R
tot
th
of heatsink ( C/W)
(W)
4.2
12
60
6.2
40
8
8.3
30
6