TDA7569BLVPD datasheet(24/41 Pages) STMICROELECTRONICS

Part #	TDA7569BLVPD

Description	4 x 50 W power amplifier with full I2C diagnostics, high efficiency and low voltage operation

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Battery transitions management

TDA7569BLV

24/41

DocID023498 Rev 9

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

TDA7569BLVPD Datasheet(PDF) 24 Page - STMicroelectronics