TDA5150 Ver la hoja de datos (PDF) - Infineon Technologies
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TDA5150 Datasheet PDF : 106 Pages
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TDA 5150
TDA 5150 Functional Description
Brownout is indicated by bit BROUTERR (0x01.2) within SFR TXTSTAT (0x01).
Note: The BOD itself can not be used to guarantee the correct operation of analog
sections, where the minimum operating voltage is defined to be 1.9 V; as this is larger
than the maximum BOD voltage. In other words, in case of a supply voltage drop, the
voltage region which is critical for reliable operation of the analog sections (min 1.9V) is
reached before the brownout detector triggers (between 1.8..1.7V).
See also Chapter 4.2 for operating voltage limits.
2.4.2.2 Low Battery Detector
TDA 5150 has an embedded Low Battery Detector (LBD) block. In active modes, LBD
monitors the voltage on VBAT supply line (pin 5). LBD has two activation thresholds, set
to 2.4 V and 2.1 V. The status regarding supply voltage below threshold events can be
updated by reading from SFR TXSTAT, bits 4 and 5 (0x01.5:4). These LBD flags are
cleared after every transmission start. The LBD might be used as early warning for low
battery voltage state (but before the battery voltage is dropping below the critical value,
which renders normal operation capability).
Data Sheet
20
V 1.0, July 2009
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