DRV8808 Datasheet, PDF (2/38 Pages) Texas Instruments – COMBINATION MOTOR DRIVER WITH DC-DC CONVERTER

DRV8808
SLVS857A – DECEMBER 2009 – REVISED AUGUST 2011
BLOCK DIAGRAM
VM
VM
A_CONT
Cstorage
0.1 µF
CSELECT Th_out
VCP
0.1 µF
Cbkt
CP2 CP1
Vout1
OD_A
FB_A
DC-DC
Converter
Ch-A
Temperature
Sensor:
Pre-TSD or
Tsens (Analog)
Thermal
Shut Down
Voltage
Charge
Pump
To High-Side ^VM
Gate Drive
Motor Drive
Output
Control A
Vout2
Vout3
OD_B
FB_B
OD_C
FB_C
nReset
nORT
LOGIC_OUT
LDO IN
LDO OUT
LDO FB
DC-DC
Converter
Ch-B
Voltage
Supervisory
VM
Regulator
Internal
Supply
DC-DC
Converter
Ch-C
Predrive,
Latch Registers,
and
Control
Circuitry
LDO
Regulator
VM
Motor Drive
Output
Control B
VM
Motor Drive
Output
Control C
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A+
VM
DC
Motor
A–
RSA ^Optional
B+
VM
DC
Motor
B–
RSB ^Optional
C+
VM
DC
Motor
C–
RSC ^Optional
nSLEEP
GND
Serial Interface
Enable_A Enable_B Enable_C Phase_A Phase_B Phase_C
STROBE
CLK
DATA _GND
GND
nWAKEUP
V3p3
0.1 µF
2
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