TDA7569LVPDTR datasheet(24/39 Pages) STMICROELECTRONICS

Part #	TDA7569LVPDTR

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

PDF	39 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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24 / 39 page

Battery transitions management

TDA7569LV

24/39

Doc ID 018712 Rev 3

Battery transitions management

7.1

Low voltage operation (“start stop”)

The most recent OEM specification are requiring automatic stop of car engine at traffic light,

in order to reduce emissions of polluting substances. The TDA7569LV, 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 33.

Worts 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

TDA7569LVPDTR Datasheet(PDF) 24 Page - STMicroelectronics