TDA2040V STMicroelectronics, TDA2040V Datasheet - Page 11

• Manufacturer Part Number: TDA2040V
• Description: IC AMP AUDIO PWR HIFI PENTAWATT5
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA2040V

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 22W x 1 @ 4 Ohm
• Voltage - Supply: 5 V ~ 40 V, ±2.5 V ~ 20 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: 22 W
• Available Set Gain: 80 dB
• Thd Plus Noise: 0.08 %
• Operating Supply Voltage: 20 V
• Maximum Power Dissipation: 25000 mW
• Maximum Operating Temperature: + 150 C
• Mounting Style: Through Hole
• Audio Load Resistance: 8 Ohms
• Dual Supply Voltage: +/- 3 V, +/- 5 V, +/- 9 V, +/- 12 V, +/- 15 V, +/- 18 V
• Input Bias Current (max): 1 uA
• Input Offset Voltage: 20 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: ± 2.5V To ± 20V
• Load Impedance: 4ohm
• Operating Temperature Range: -40°C To +150°C
• Rohs Compliant: Yes
• Dc: 1141
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-3027-5

TDA2040
3.2
Figure 21. Frequency response
Multiway speaker systems and active boxes
Multiway loudspeaker systems provide the best possible acoustic performance since each
loudspeaker is specially designed and optimized to handle a limited range of frequencies.
Commonly, these loudspeaker systems divide the audio spectrum into two, three or four
bands.
To maintain a flat frequency response over the hi-fi audio range the bands covered by each
loudspeaker must overlap slightly. Any imbalance between the loudspeakers produces
unacceptable results, therefore, it is important to ensure that each unit generates the correct
amount of acoustic energy for its segment of the audio spectrum. In this respect it is also
important to know the energy distribution of the music spectrum (see Figure 22) in order to
determine the cut-off frequencies of the crossover filters. As an example, a 100-W three-way
system with crossover frequencies of 400 Hz and 3 kHz would require 50 W for the woofer,
35 W for the midrange unit and 15 W for the tweeter.
Both active and passive filters can be used for crossovers but today active filters cost
significantly less than a good passive filter using air-cored inductors and non-electrolytic
capacitors. In addition, active filters do not suffer from the typical defects of passive filters:
Obviously, active crossovers can only be used if a power amplifier is provided for each drive
unit. This makes it particularly interesting and economically sound to use monolithic power
amplifiers.
In some applications, complex filters are not really necessary and simple RC low-pass and
high-pass networks (6 dB/octave) can be recommended. The results obtained are excellent
because this is the best type of audio filter and the only one free from phase and transient
distortion. The rather poor out of band attenuation of single RC filters means that the
loudspeaker must operate linearly well beyond the crossover frequency to avoid distortion.
power loss
increased impedance seen by the loudspeaker (lower damping)
difficulty of precise design due to variable loudspeaker impedance
Doc ID 1460 Rev 4
Figure 22. Power distribution vs frequency
Applications
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