TDA7360 STMicroelectronics, TDA7360 Datasheet - Page 20

• Manufacturer Part Number: TDA7360
• Description: IC AMP AUDIO PWR 22W MULTIWATT11
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7360

• Output Type: 1-Channel (Mono) or 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 22W x 1 @ 3.2 Ohm; 12W x 2 @ 1.6 Ohm
• Voltage - Supply: 8 V ~ 18 V
• Features: Depop, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Package / Case: Multiwatt-11 (Vertical, Bent and Staggered Leads)
• Operational Class: Class-AB
• Output Power (typ): 22W
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.05%%
• Single Supply Voltage (typ): 9/12/15V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Power Dissipation: 36W
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 62dB
• Single Supply Voltage (min): 8V
• Single Supply Voltage (max): 18V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Mounting: Through Hole
• Pin Count: 11 +Tab
• Package Type: MULTIWATT V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-3973-5

General description
3.3
3.3.1
3.3.2
20/30
Built-in protection systems
Short circuit protection
The maximum current the device can deliver can be calculated by considering the voltage
that may be present at the terminals of a car radio amplifier and the minimum load
impedance.
Apart from consideration concerning the area of the power transistors it is not difficult to
achieve peak currents of this magnitude (5A peak).
However, it becomes more complicated if AC and DC short circuit protection is also
required.In particular, with a protection circuit which limits the output current following the
SOA curve of the output transistors it is possible that in some conditions (highly reactive
loads, for example) the protection circuit may intervene during normal operation. For this
reason each amplifier has been equipped with a protection circuit that intervenes when the
output current exceeds 4A.
Figure 36
applies to PNP).The VBE of the power is monitored and gives out a signal, available through
a cascade.
This cascade is used to avoid the intervention of the short circuit protection when the
saturation is below a given limit.
The signal sets a flip-flop which forces the amplifier outputs into a high impedance state.
In case of DC short circuit when the short circuit is removed the flip-flop is reset and restarts
the circuit
device is continuously switched in ON/OFF conditions and the current is limited.
Figure 36. Circuitry for short circuit detection
Load dump voltage surge
The TDA7360 has a circuit which enables it to withstand a voltage pulse train on pin 9, of the
type shown in
If the supply voltage peaks to more than 40V, then an LC filter must be inserted between the
supply and pin 9, in order to assure that the pulses at pin 9 will be held within the limits
shown.
A suggested LC network is shown in
amplitude up to 120V and width of 2ms can be applied at point A. This type of protection is
shows the protection circuit for an NPN power transistor (a symmetrical circuit
(Figure
Figure
40). In case of AC short circuit or load shorted in Bridge configuration, the
37.
Doc ID 1499 Rev 3
Figure
37. With this network, a train of pulses with
TDA7360