Datasheet
DRV8840
www.ti.com
SLVSAB7C –MAY 2010–REVISED AUGUST 2013
Table 1. TERMINAL FUNCTIONS
EXTERNAL COMPONENTS
NAME PIN I/O
(1)
DESCRIPTION
OR CONNECTIONS
POWER AND GROUND
GND 14, 28 - Device ground
Connect to motor supply (8.2 - 45 V). Both
VM 4, 11 - Bridge A power supply
pins must be connected to same supply.
Bypass to GND with a 0.47-μF, 6.3-V ceramic
V3P3OUT 15 O 3.3-V regulator output
capacitor. Can be used to supply VREF.
CP1 1 IO Charge pump flying capacitor
Connect a 0.01-μF 50-V capacitor between
CP1 and CP2.
CP2 2 IO Charge pump flying capacitor
Connect a 0.1-μF 16-V ceramic capacitor and
VCP 3 IO High-side gate drive voltage
a 1-MΩ resistor to VM.
CONTROL
Logic high sets OUT1 high, OUT2 low.
PHASE 20 I Bridge phase (direction)
Internal pulldown.
Logic high to enable H-bridge. Internal
ENBL 21 I Bridge enable
pulldown.
I0 23 I
I1 24 I
Sets winding current as a percentage of full-
I2 25 I Current set inputs
scale. Internal pulldown.
I3 26 I
I4 27 I
Low = brake (slow decay), high = coast (fast
DECAY 19 I Decay (brake) mode
decay). Internal pulldown and pullup.
Active-low reset input initializes the logic and
nRESET 16 I Reset input disables the H-bridge outputs. Internal
pulldown.
Logic high to enable device, logic low to enter
nSLEEP 17 I Sleep mode input
low-power sleep mode. Internal pulldown.
Reference voltage for winding current set.
VREF 12,13 I Current set reference input Both pins must be connected together on the
PCB.
STATUS
Logic low when in fault condition (overtemp,
nFAULT 18 OD Fault
overcurrent)
OUTPUT
Connect to current sense resistor. Both pins
ISEN 6, 9 IO Bridge ground / Isense
must be connected together on the PCB.
Connect to motor winding. Both pins must be
OUT1 5, 10 O Bridge output 1
connected together on the PCB.
Connect to motor winding. Both pins must be
OUT2 7, 8 O Bridge output 2
connected together on the PCB.
(1) Directions: I = input, O = output, OZ = tri-state output, OD = open-drain output, IO = input/output
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