DRV3202-Q1_15 Datasheet, PDF (16/39 Pages) Texas Instruments – 3-Phase Brushless Motor Driver

DRV3202-Q1
SLVSBJ4A – OCTOBER 2012 – REVISED DECEMBER 2012
CHARGE PUMP
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Description
The charge pump block generates the supply for high-side and low-side pre-drivers to maintain the gate voltage
on the external FETs. External storage cap (CCP) and bucket caps (C1, C2) are used to support pre-driver slope
and switching frequency requirements. R1 and R2 can reduce switching current if required. The charge pump
has a voltage supervisor for over and undervoltage, and a selectable stop condition for pre-drivers.
PDCPV
CP
Supervisor
UV
CP Logic
CP14
MAX
CPCLK
VB
S2
VF
CPDR2
C2
CPDR1
S1
GFB
S4
VF
VF
PDCPV ^CCP
CPDR4
C1
CPDR3
S3
GFB
Figure 13. Charge Pump Block Diagram
16
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