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TDA7577BLVPD bảng dữ liệu(PDF) 24 Page - STMicroelectronics

tên linh kiện TDA7577BLVPD
Giải thích chi tiết về linh kiện  2 x 75 W dual-bridge power amplifier with I2C complete diagnostics and
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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TDA7577BLVPD bảng dữ liệu(HTML) 24 Page - STMicroelectronics

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Battery transitions management
TDA7577BLV
24/43
DocID025375 Rev 5
6
Battery transitions management
6.1
Low voltage operation (“start stop”)
The most recent OEM specifications require automatic stop of car engine at traffic light, in
order to reduce emissions of polluting substances. The TDA7577BLV, thanks to its
innovating design, is able to play when battery falls down to 6/7 V during such conditions,
without producing audible pop noise. The maximum system power will be reduced
accordingly.
Worst case battery cranking curves are shown below, indicating the shape and duration of
allowed battery transitions.
Figure 33. 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 34. 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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