Page 2
3932
THREE-PHASE POWER MOSFET CONTROLLER
Functional Block Diagram (1 of 3 outputs shown)
VREG
VBB
LCAP
Regulator
H1
Undervoltage
Detect
Bootcap
Monitor
CA
H2
C
BOOT
H3
To Phase C
GHA
PWM
High Side Protection
Logic
Control
Logic
Gate-Source
Monitor
Turn-on
Delay
High
Side
Driver
DIR
RESET
SA
VREG
SR
BRAKE
MODE
TACH
Low Side Protection
Logic
Turn-on
Delay
Low
Side
Driver
GLA
To Phase B
RC
C
T
R
T
RC Blanking
Fixed - Off
Time
-
+
Bootstrap low
Vgs Low
Motor Lead Short
Invalid Hall
Undervoltage
PGND
SENSE
R
S
FAULT
to LCAP
REF
DEAD
Dead-Time
Adjust
AGND