DRV8824-Q1_15 Datasheet, PDF (3/30 Pages) Texas Instruments – DRV8824-Q1 Automotive Motor Controller IC

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6 Terminal Configuration and Functions
PWP Package
(Top View)
DRV8824-Q1
SLVSCH0 – APRIL 2014
NAME
TERMINAL
POWER AND GROUND
GND
14, 28
VMA
4
VMB
11
V3P3OUT
15
CP1
1
CP2
2
VCP
3
CONTROL
nENBL
21
nSLEEP
17
STEP
22
DIR
20
MODE0
24
MODE1
25
MODE2
26
DECAY
19
nRESET
16
AVREF
12
BVREF
13
NC
23
STATUS
nHOME
27
nFAULT
18
Terminal Functions
I/O
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
Enable input
I
Sleep mode input
I
Step input
I
Direction input
I
Microstep mode 0
I
Microstep mode 1
I
Microstep mode 2
I
Decay mode
I
Reset input
I
Bridge A current set reference input
I
Bridge B current set reference input
No connect
OD
Home position
OD
Fault
Copyright © 2014, Texas Instruments Incorporated
EXTERNAL COMPONENTS
OR CONNECTIONS
Connect to motor supply (8.2 V - 45 V). Both terminals
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 and a 1-MΩ
resistor to VM.
Logic high to disable device outputs and indexer
operation, logic low to enable. Internal pulldown.
Logic high to enable device, logic low to enter low-
power sleep mode. Internal pulldown.
Rising edge causes the indexer to move one step.
Internal pulldown.
Level sets the direction of stepping. Internal pulldown.
MODE0 - MODE2 set the step mode - full, 1/2, 1/4,
1/8/ 1/16, or 1/32 step. Internal pulldown.
Low = slow decay, open = mixed decay,
high = fast decay. Internal pulldown and pullup.
Active-low reset input initializes the indexer logic and
disables the H-bridge outputs. Internal pulldown.
Reference voltage for winding current set. Normally
AVREF and BVREF are connected to the same
voltage. Can be connected to V3P3OUT. A 0.01-µF
bypass capacitor to GND is recommended.
Leave this terminal unconnected.
Logic low when at home state of step table
Logic low when in fault condition (overtemp,
overcurrent)
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