DRV8846_15 Datasheet, PDF (3/35 Pages) Texas Instruments – DRV8846 Dual H-Bridge Stepper Motor Driver

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6 Pin Configuration and Functions
RGE (VQFN) Package
24 Pins
(Top View)
AOUT1 1
AISEN 2
AOUT2 3
BOUT2 4
BISEN 5
BOUT1 6
GND
(PPAD)
18 GND
17 VINT
16 NC
15 VM
14 VREF
13 DIR
DRV8846
SLLSEK2 – JUNE 2014
NAME
ADEC
PIN
NO.
19
AISEN
AOUT1
AOUT2
BISEN
BOUT1
BOUT2
DEC0
DEC1
DIR
GND
I0
I1
MO
M1
NC
nENBL
2
1
3
5
6
4
22
24
13
18, PPAD
20
21
8
9
16
11
nFAULT
7
nSLEEP
23
STEP
12
TOFF_SEL
10
Pin Functions
I/O
DESCRIPTION
I Adaptive decay enable
O Winding A sense
Logic low sets decay modes by DEC0 and DEC1 pins; logic high –
adaptive decay operation is enabled; must be set prior to coming out
of sleep; internal pulldown
Connect to current sense resistor for bridge A, or GND if current
regulation is not required
O Winding A output
O Winding B sense
Connect to current sense resistor for bridge B, or GND if current
regulation is not required
O Winding B output
I
Decay mode setting pins
I
I Direction input
PWR Device ground
I
Torque DAC current scalar
I
I _{Microstepping mode setting}
I ^pins
— No connect
I Enable driver output
OD Fault indication pin
I Sleep mode input
I Step input
I Decay mode off time set
Sets the decay mode; see description section; tri-level pin
Logic level sets the direction of stepping; internal pulldown
Both the GND pin and device PowerPAD™ must be connected to
ground
Scales the current from 100% to 12.5% in 12.5% steps; tri-level pin
Controls step mode (full, half, up to 1/32-step) and single- or dual-
edge clocking; tri-level pin
Unused pin not connected internally
Logic low to enable device outputs and internal indexer; logic high to
disable; internal pulldown
Pulled logic low with fault condition; open-drain output requires
external pullup
Logic high to enable device; logic low to enter low-power sleep mode;
internal pulldown
A rising edge (or rising and falling depending on step mode) advances
the indexer one step; internal pulldown
Sets the off-time during current chopping; tri-level pin
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