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TDA7569BLVPD Datasheet(PDF) 24 Page - STMicroelectronics

No. de pieza TDA7569BLVPD
Descripción Electrónicos  4 x 50 W power amplifier with full I2C diagnostics, high efficiency and low voltage operation
PDF  41 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7569BLVPD Datasheet(HTML) 24 Page - STMicroelectronics

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Battery transitions management
TDA7569BLV
24/41
DocID023498 Rev 9
7
Battery transitions management
7.1
Low voltage operation (“start stop”)
The most recent OEM specifications are requiring automatic stop of car engine at traffic
light, in order to reduce emissions of polluting substances. The TDA7569BLV, thanks to its
innovating design, allows a continuous operation when battery falls down to 6/7V during
such conditions, without producing pop noise. The maximum system power will be reduced
accordingly.
Worst case battery cranking curves are shown below, indicating the shape and durations of
allowed battery transitions.
Figure 34. Worst case battery cranking curve sample 1
V1 = 12 V; V2 = 6 V; V3 = 7 V; V4 = 8 V
t1 = 2 ms; t2 = 50 ms; t3 = 5 ms; t4 = 300 ms; t5 =10 ms; t6 = 1 s; t7 = 2 ms
Figure 35. Worst case battery cranking curve sample 2
V1 = 12 V; V2 = 6 V; V3 = 7 V
t1 = 2 ms; t2 = 5 ms; t3 = 15 ms; t5 = 1 s; t6 = 50 ms



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