DRV3204-Q1_15 Datasheet, PDF (27/38 Pages) Texas Instruments – Three-Phase Brushless Motor Driver

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DRV3204-Q1
SLVSBT3B – MARCH 2013 – REVISED JULY 2013
VB Monitor
Description:
The VB monitoring system has two comparators for under- and overvoltage, and has pre-driver stop controlling
system respectively. Overvoltage provides pre-driver stop condition selectable (SPI control). On the other hand,
under voltage must stop pre-driver operation under detection (no selectable). 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
VBOVhys⁽¹⁾ VB overvoltage detection hysteresis
CONDITIONS
VBUV
VB Undervoltage detection threshold level
SPI register FLTCFG. VBUVTH
VBUVhys⁽¹⁾ VB Undervoltage detection hysteresis
(1) Specified by design
SPI register FLTCFG. VBUVTH
MIN TYP MAX UNITS
26.5 27.5 28.5 V
0.2 0.5 1.2 V
3.65
4 4.35
4.15 4.5 4.85
4.65
5 5.35
V
5.15 5.5 5.85
0.1 0.25 0.5
0.2 0.4 0.8
0.2 0.5 1.0
V
0.3 0.65 1.3
Thermal Shut Down
Description:
The device has temperature sensors that produce pre-driver stop condition if the chip temperature exceeds 175
degree.
IPTAT
TSD
Figure 21. Thermal Shutdown Block Diagram
Copyright © 2013, Texas Instruments Incorporated
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