DRV8811_11 Datasheet, PDF (3/22 Pages) Texas Instruments – STEPPER MOTOR CONTROLLER IC

DRV8811
www.ti.com
SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010
NAME
GND
VMA
VMB
VCC
CP1
CP2
VCP
VGD
ENABLEn
SLEEPn
DECAY
STEP
DIR
USM0
USM1
RESETn
SRn
VREF
RCA
RCB
ISENA
ISENB
AOUT1
AOUT2
BOUT1
BOUT2
HOMEn
NO.
7, 21
28
15
10
23
24
22
20
26
27
5
19
3
13
12
17
16
8
6
9
1
14
4
25
11
18
2
I/O ⁽¹⁾
-
-
-
-
IO
IO
IO
IO
I
I
I
I
I
I
I
I
I
I
I
I
-
-
O
O
O
O
O
TERMINAL FUNCTIONS
DESCRIPTION
EXTERNAL COMPONENTS OR CONNECTIONS
POWER AND GROUND
Device ground
Bridge A power supply
Connect to motor supply (8 V to 38 V). Both pins must be connected
to same supply.
Bridge B power supply
Connect to motor supply (8 V to 38 V). Both pins must be connected
to same supply.
Logic supply voltage
Connect to 3-V to 5-V logic supply. Bypass to GND with a 0.1-mF
ceramic capacitor
Charge pump flying capacitor
Connect a 0.22-mF capacitor between CP1 and CP2
Charge pump flying capacitor
Connect a 0.22-mF capacitor between CP1 and CP2
High-side gate drive voltage
Low-side gate drive voltage
Connect a 0.22-mF ceramic capacitor to V_M
Bypass to GND with a 0.22-mF ceramic capacitor
CONTROL
Enable input
Logic high to disable device outputs, logic low to enable outputs
Sleep mode input
Logic high to enable device, logic low to enter low-power sleep mode
Decay mode select
Voltage applied sets decay mode - see motor driver description for
details. Bypass to GND with a 0.1-mF ceramic capacitor
Step input
Rising edge causes the indexer to move one step
Direction input
Level sets the direction of stepping
Microstep mode 0
USM0 and USM1 set the step mode - full step, half step, quarter
step, or eight microsteps/step
Microstep mode 1
USM0 and USM1 set the step mode - full step, half step, quarter
step, or eight microsteps/step
Reset input
Active-low reset input initializes the indexer logic and disables the
H-bridge outputs
Sync. Rect. enable input
When active low, synchronous rectification is enabled
Current set reference input
Reference voltage for winding current set
Bridge A blanking and off time adjust Connect a parallel resistor and capacitor to GND - see motor driver
description for details
Bridge B blanking and off time adjust Connect a parallel resistor and capacitor to GND - see motor driver
description for details
Bridge A ground / Isense
Connect to current sense resistor for bridge A
Bridge B ground / Isense
Connect to current sense resistor for bridge B
OUTPUTS
Bridge A output 1
Connect to bipolar stepper motor winding A
Bridge A output 2
Positive current is AOUT1 → AOUT2
Bridge B output 1
Connect to bipolar stepper motor winding B
Bridge B output 2
Positive current is BOUT1 → BOUT2
Home position
Logic low when at home state of step table, logic high at other states
(1) Directions: I = input, O = output, OZ = 3-state output, OD = open-drain output, IO = input/output
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Product Folder Link(s): DRV8811
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