DRV8809 Datasheet, PDF (26/44 Pages) Texas Instruments – COMBINATION MOTOR DRIVERS WITH DC-DC CONVERTERS

DRV8809
DRV8810
SLVS854A – JULY 2008 – REVISED JULY 2008 ............................................................................................................................................................... www.ti.com
Short/Open for Motor Outputs
When a short/open situation happens, the protection circuit prevents device damage under certain conditions
(short at start up, etc).
Charge
VM
pump
RSA
VM
Rsens
OSCM_mon
OSCM
( 800kHz )
OSCi
( 6.4MHz )
OUTA
DATA_AB
CLK_AB
Strobe_AB
Stepper
parameter
register
Torque,
Decay,
Current,
& Phase
Control logic
& Pre-driver
Current
Sens
Current
limit
OUTA/
MGND
RSB
VM
Rsens
VM
supervisor
(15v)
turn on/off
over
current
detect
Protect
disable
Setup/ex-setup
register
Protection
control &
nORT assertion
Figure 18. Stepper Motor Driver
OUTB
OUTB/
Stepper
Motor
26
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