DRV3203-Q1_15 Datasheet, PDF (28/37 Pages) Texas Instruments – Three-Phase Brushless Motor Driver

DRV3203-Q1
SLVSC09A – MAY 2013 – REVISED JUNE 2013
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VB Monitor
Description:
The VB monitoring system has two comparators for under- and overvoltage, and has pre-driver stop-controlling
system. Overvoltage provides a selectable pre-driver stop condition (SPI control), while undervoltage must stop
pre-driver operation under detection (no selectable). The system should return to normal operation automatically
after undetected level.
VB
+
VB_OV
VB_UV
VREF
-
Figure 20. VB Monitor Block Diagram
Table 9. Electrical Characteristics
PARAMETER
VB = 12 V, T_A = –40°C to +125℃ (unless otherwise specified)
VB MONITOR
VBOV
VB overvoltage detection threshold level
CONDITIONS
VBUV
VB Undervoltage detection threshold level
SPI register FLTCFG. VBUVTH
MIN TYP MAX UNITS
26.5 27.5 28.5 V
3.65
4 4.35
4.15 4.5 4.85
4.65
5 5.35
V
5.15 5.5 5.85
Thermal Shut Down
Description:
The device has temperature sensors that produce pre-driver stop condition if the chip temperature exceeds
175°C.
IPTAT
TSD
Figure 21. Thermal Shutdown Block Diagram
28
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