DRV3203-Q1_15 Datasheet, PDF (26/37 Pages) Texas Instruments – Three-Phase Brushless Motor Driver

DRV3203-Q1
SLVSC09A – MAY 2013 – REVISED JUNE 2013
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Regulators
Description:
The regulator block offers 3.3-V LDOs. The VCC LDO regulates VB down to 3.3 V with an external PNP
controlled by the regulator block. This 3.3-V LDO is supplied to MCU and other components.
The VDD regulator regulates VB down to 3.3 V with internal FET and controller. The 3.3-V LDO with the external
PNP is protected against short to GND fault. Overvoltage and undervoltage events of both supplies are detected.
The under voltage of the 3.3-V LDO with the external PNP is set by SPI.
VB
OC
Current
Limit
VCFB
BG
+
AMP
-
VCCB
VCC
Rsns
PNP Tr
CVCC
* 0.2VáRsns*VCCOC
OV
Superviser
UV
Figure 18. VCC Block Diagram (External Driver)
BG
+
AMP
-
VB
VDD
CVDD
OV
Superviser
UV
Figure 19. VDD Block Diagram
26
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