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TDA7240AH
20W BRIDGE AMPLIFIER FOR CAR RADIO
TDA7240A20W BRIDGE AMPLIFIER FOR CAR RADIO. COMPACT HEPTAWATT PACKAGE . FEW EXTERNAL COMPONENTS. OUTPUT PROTECTED AGAINST SHORT
CIRCUITS TO GROUND AND ACROSS LOAD. DUMP TRANSIENT. THERMAL SHUTDOWN . LOUDSPEAKER PROTECTION. HIGH CURRENT CAPABILITY. LOW DISTORTION/LOW NOISE
DESCRIPTIONThe TDA7240A is a 20W bridge audio amplifier IC
designed specially for car radio applications.
Thanks to the low external part count and compact
Heptawatt 7-pin power package the TDA7240A
occupies little space on the printed circuit board.
Reliable operation is guaranteed by a comprehen-
sive array of on-chip protection features. These in-
clude protection against AC and DC output short
circuits (to ground and across the load), load dump
transients, and junction overtemperature. Additio-
nally, the TDA7240A protects the loudspeaker when
one output is short-circuited to ground.
Figure 1: Test and Application CircuitABSOLUTE MAXIMUM RATINGS(*) Internally limited
PIN CONNECTION (Top view)
THERMAL DATA
TDA7240A
ELECTRICAL CHARACTERISTICS (refer to the circuit of fig. 1, Tamb = 25°C, Rth (heatsink) = 4°C/W,Vs = 14.4V)
(*) B= Curve A (**) B = 22Hz to 22 KHz
Figure 2 : P.C. Board and Components layout of the Circuit of Fig. 1.(1:1scale)
TDA7240A
APPLICATION SUGGESTIONThe recommended values of the components are those shown on application circuit of Fig. 1. Different values
can be used, the following table can help the designer.
Figure 4 : Distortion vs. Output Power.Figure 3 : Output Power vs. Supply Voltage.
Figure 6 : Distortion vs. Output Power.Figure 5 : Output Power vs. Supply voltage.
TDA7240A
Figure 8 : Supply Voltage Rejectionvs. Frequency.
Figure 7 : Distortion vs. Frequency.
Figure 10 : Power Dissipation and Efficiency vs.Output Power.
Figure 9 : Power Dissipation and Efficiency vs. Output Power.
TDA7240A
