TDA7492MV13TR STMicroelectronics, TDA7492MV13TR Datasheet - Page 23

• Manufacturer Part Number: TDA7492MV13TR
• Description: IC AMP AUD CLASS D BTL PWRSSO36
• Manufacturer: STMicroelectronics
• Type: Class Dr

Specifications of TDA7492MV13TR

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 50W x 1 @ 6 Ohm
• Voltage - Supply: 5 V ~ 18 V
• Features: Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-11059-2

TDA7491MV
7.5
Filterless modulation
The output modulation scheme of the BTL is called unipolar pulse width modulation (PWM).
The differential output voltages change between 0 V and +V
This is in contrast to the traditional bipolar PWM outputs which change between +V
and -V
An advantage of this scheme is that it effectively doubles the switching frequency of the
differential output waveform. The OUTP and OUTN are in the same phase when the input is
zero, then the switching current is low and the loss in the load is small. In practice, a short
delay is introduced between these two outputs in order to avoid the BTL output switching at
the same time.
TDA7491MV can be used without a filter before the speaker, because the frequency of the
TDA7491MV output is beyond the audio frequency, the audio signal can be recovered by the
inherent inductance of the speaker and natural filter of the human ear.
Figure 23. Unipolar PWM output
CC
.
INP
INN
OUTP
OUTN
Differential
OUT
Doc ID 14576 Rev 2
CC
and between 0 V and -V
Application information
CC
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CC
.