DRV8841_15 Datasheet, PDF (4/28 Pages) Texas Instruments – Dual H-Bridge Driver IC

DRV8841
SLVSAC0F – MAY 2010 – REVISED DECEMBER 2015
NAME
PIN
NO.
I/O ⁽¹⁾
Pin Functions (continued)
DESCRIPTION
DECAY
19
I
Decay mode
nRESET
16
I
Reset input
nSLEEP
17
AVREF
12
I
Sleep mode input
I
Bridge A current set reference input
BVREF
13
I
Bridge B current set reference input
STATUS
nFAULT
18
OD
Fault
OUTPUT
ISENA
6
IO
Bridge A ground / Isense
ISENB
9
IO
Bridge B ground / Isense
AOUT1
5
O
Bridge A output 1
AOUT2
7
O
Bridge A output 2
BOUT1
10
O
Bridge B output 1
BOUT2
8
O
Bridge B output 2
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EXTERNAL COMPONENTS
OR CONNECTIONS
Low = slow decay, open = mixed decay,
high = fast decay. Internal pulldown and
pullup.
Active-low reset input initializes internal logic
and disables the H-bridge outputs. Internal
pulldown.
Logic high to enable device, logic low to enter
low-power sleep mode. Internal pulldown.
Reference voltage for winding current set.
Can be driven individually with an external
DAC for microstepping, or tied to a reference
(for example, V3P3OUT).
Logic low when in fault condition
(overtemperature, overcurrent)
Connect to current sense resistor for bridge A
Connect to current sense resistor for bridge B
Connect to motor winding A
Connect to motor winding B
4
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