TDA7240AV

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Type:	Class AB
Output Type:	1-Channel (Mono)
Max Output Power x Channels @ Load:	20W x 1 @ 4 Ohm
Voltage - Supply:	8 V ~ 18 V
Features:	Short-Circuit and Thermal Protection, Standby
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 150°C (TJ)
Supplier Device Package:	7-HEPTAWATT
Package / Case:	Heptawatt-7 (Vertical, Bent and Staggered Leads)
Base Part Number:	TDA7240A

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TDA7240AV application field and working principle

TDA7240AV is a 30-W BTL audio power amplifier in a 13-pin single-in-line (SIP) configuration designed for use in automotive radio applications. The TDA7240AV is a class-B power amplifier that features a minimum supply voltage of 4.5 V and a maximum supply voltage of 18 V. It is protected from output shorts to ground and from output shorts to supplies, allowing direct connection to the loudspeaker without external current limiting resistors. The internal thermal shutdown circuitry is activated when the junction temperature exceeds the safe operating temperature.

Application Fields

TDA7240AV can be used in automotive radios and other applications requiring high-grade processing of audio signal. It provides excellent quality audio performance for BTL designs. It is also suitable for automotive applications with its small SIP13 package and low power consumption. The TDA7240AV is a very versatile power amplifier, capable of operating at different power modes with a power output of up to 30W into 4 ohms load. Apart from the automotive radios, TDA7240AV can also be used in portable audio players, home entertainment systems, laptop speakers and speakerphones.

Working Principle

The TDA7240AV is a high power class-B amplifier operating with a single-supply voltage. Its features include a standby mode, mute control and thermal shutdown protection. It operates with a supply voltage of 4.5 ~ 18V and delivers a minimum output power of 30 W into 4 ohms load.The output stage of the amplifier is based on two Darlington transistors, the bipolar one is driven by the dedicated driver stage and the MOSFET one is driven by the internal oscillator. The overall stage architecture is a class-B amplifier providing an efficiency of >80%. The amplifier operates in a single-ended mode allowing direct connection to the loudspeaker.The amplifier provides several control options including a standby function, shutdown control and mute control. The mute control allows for the loudspeaker to be completely disconnected from the output in order to save energy or to eliminate any background noise. The shutdown control allows for the whole amplifier to be put into a low power consumption state.

Conclusion

The TDA7240AV is a high power efficiency and high quality class-B amplifier suitable for automotive radios, portable audio players and home entertainment systems. It features a supply voltage of 4.5 ~ 18V and a maximum output power of 30W into 4 ohms load. It provides several control functions including standby, mute and shutdown control. The overall architecture of the amplifier is based on two Darlington transistors, providing an excellent audio performance in automotive applications.

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