DRV8814 Datasheet, PDF (3/16 Pages) Texas Instruments – DC MOTOR DRIVER IC 2.5-A Maximum Drive Current at 24 V, 25°C

DRV8814
www.ti.com
SLVSAB9C – MAY 2010 – REVISED MARCH 2011
Table 1. TERMINAL FUNCTIONS
NAME
PIN
POWER AND GROUND
GND
14, 28
VMA
4
VMB
11
V3P3OUT
15
CP1
1
CP2
2
VCP
3
CONTROL
AENBL
21
APHASE
20
AI0
24
AI1
25
BENBL
22
BPHASE
23
BI0
26
BI1
27
DECAY
19
nRESET
16
nSLEEP
17
AVREF
12
BVREF
13
STATUS
nFAULT
18
OUTPUT
ISENA
6
ISENB
9
AOUT1
5
AOUT2
7
BOUT1
10
BOUT2
8
I/O ⁽¹⁾
DESCRIPTION
-
Device ground
-
Bridge A power supply
-
Bridge B power supply
O
3.3-V regulator output
IO
Charge pump flying capacitor
IO
Charge pump flying capacitor
IO
High-side gate drive voltage
I
Bridge A enable
I
Bridge A phase (direction)
I
Bridge A current set
I
I
Bridge B enable
I
Bridge B phase (direction)
I
Bridge B current set
I
I
Decay (brake) mode
I
Reset input
I
Sleep mode input
I
Bridge A current set reference input
I
Bridge B current set reference input
OD
Fault
IO
Bridge A ground / Isense
IO
Bridge B ground / Isense
O
Bridge A output 1
O
Bridge A output 2
O
Bridge B output 1
O
Bridge B output 2
EXTERNAL COMPONENTS
OR CONNECTIONS
Connect to motor supply (8 - 45 V). Both pins
must be connected to same supply.
Bypass to GND with a 0.47-μF 6.3-V ceramic
capacitor. Can be used to supply VREF.
Connect a 0.01-μF 50-V capacitor between
CP1 and CP2.
Connect a 0.1-μF 16-V ceramic capacitor to
VM.
Logic high to enable bridge A
Logic high sets AOUT1 high, AOUT2 low
Sets bridge A current: 00 = 100%,
01 = 71%, 10 = 38%, 11 = 0
Logic high to enable bridge B
Logic high sets BOUT1 high, BOUT2 low
Sets bridge B current: 00 = 100%,
01 = 71%, 10 = 38%, 11 = 0
Low = brake (slow decay),
high = coast (fast decay)
Active-low reset input initializes internal logic
and disables the H-bridge outputs
Logic high to enable device, logic low to enter
low-power sleep mode
Reference voltage for winding current set.
Can be driven individually with an external
DAC for microstepping, or tied to a reference
(e.g., V3P3OUT).
Logic low when in fault condition (overtemp,
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
(1) Directions: I = input, O = output, OZ = tri-state output, OD = open-drain output, IO = input/output
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