DRV8821_16 Datasheet, PDF (4/32 Pages) Texas Instruments – Dual Stepper Motor Controller and Driver

DRV8821
SLVS912J – JANUARY 2009 – REVISED JANUARY 2016
www.ti.com
PIN
NAME
NO.
BOUT1
48
BOUT2
46
BISEN
47
MOTOR CD
CDSTEP
33
CDDIR
31
CDUSM0
32
CDUSM1
29
CDENBLn
30
CDRESETn 28
CDDECAY
19
CDREF
18
COUT1
27
COUT2
25
CISEN
26
DOUT1
22
DOUT2
20
DISEN
21
Pin Functions (continued)
I/O ⁽¹⁾
DESCRIPTION
EXTERNAL COMPONENTS OR CONNECTIONS
O Bridge B output 1
O Bridge B output 2
— Bridge B current sense
Connect to second coil of bipolar stepper motor AB, or DC motor
winding.
Connect to current sense resistor for bridge B.
I Motor CD step input
I Motor CD direction input
I Motor CD microstep mode 0
I Motor CD microstep mode 1
I Motor CD enable input
I Motor CD reset input
I Motor CD decay mode
I
Motor CD current set reference
voltage
O Bridge C output 1
O Bridge C output 2
— Bridge C current sense
O Bridge D output 1
O Bridge D output 2
— Bridge D current sense
Rising edge causes the indexer to move one step.
Level sets the direction of stepping.
USM0 and USM1 set the step mode - full step, half step, quarter
step, or eight microsteps/step.
Logic high to disable motor CD outputs, logic low to enable.
Active-low reset input initializes the indexer logic and disables the H-
bridge outputs for motor CD.
Logic low for slow decay mode, high for mixed decay.
Sets current trip threshold.
Connect to first coil of bipolar stepper motor CD, or DC motor
winding.
Connect to current sense resistor for bridge C.
Connect to second coil of bipolar stepper motor CD, or DC motor
winding.
Connect to current sense resistor for bridge D.
6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)^{(1) (2)}
MIN
MAX
UNIT
V_M
V_I
I_O(peak)
I_O
P_D
T_J
T_A
T_stg
Power supply voltage
Logic input voltage ⁽³⁾
Peak motor drive output current, t < 1 μs
Motor drive output current ⁽⁴⁾
Continuous total power dissipation
Operating virtual junction temperature
Operating ambient temperature
Storage temperature
–0.3
34
V
–0.5
5.75
V
Internally limited
1.5
A
See Dissipation Ratings
–40
150
°C
–40
85
°C
–60
150
°C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal.
(3) Input pins may be driven in this voltage range regardless of presence or absence of V_M.
(4) Power dissipation and thermal limits must be observed.
6.2 ESD Ratings
V_(ESD) Electrostatic discharge
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins ⁽¹⁾
Charged device model (CDM), per JEDEC specification JESD22-C101,
all pins ⁽²⁾
VALUE
2000
1000
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
UNIT
V
4
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