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| DRV8818_15 Datasheet, PDF (6/31 Pages) Texas Instruments – DRV8818 Stepper Motor Controller IC | |||
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DRV8818
SLVSAX9D â SEPTEMBER 2011 â REVISED JANUARY 2015
Electrical Characteristics (continued)
TA = 25°C (unless otherwise noted)
PARAMETER
MOTOR DRIVER
tOFF
Off time
tBLANK Current sense blanking time
tDT
Dead time
tR
Rise time
tF
Fall time
PROTECTION CIRCUITS
TTSD
IOCP
tOCP
tRET
Thermal shutdown temperature
Overcurrent protection level
OCP deglitch time
OCP retry time
TEST CONDITIONS
Rx = 56 kâ¦, Cx = 680 pF
Rx = 56 kâ¦, Cx = 680 pF
SRn = 0
Die temperature
7.6 Timing Requirements
TA = 25°C (unless otherwise noted)
1
fSTEP
2
tWH(STEP)
3
tWL(STEP)
4
tSU(STEP)
5
tH(STEP)
6
tWAKE
7
tSLEEP
8
tENABLE
9
tDISABLE
10 tRESETR
11 tRESET
Step frequency
Pulse duration, STEP high
Pulse duration, STEP low
Setup time, command before STEP rising
Hold time, command after STEP rising
Wakeup time, SLEEPn inactive high to STEP input accepted
Sleep time, SLEEPn active low to outputs disabled
Enable time, ENABLEn inactive high to outputs enabled
Disable time, ENABLEn active low to outputs disabled
Reset release time, RESETn inactive high to outputs enabled
Reset time, RESETn active low to outputs disabled
1
2
3
STEP
DIR, USMx
SLEEPn, ENABLEn, RESETn
45
6
8
10
OUTPUT
Figure 1. Timing Diagram
www.ti.com
MIN
TYP
MAX UNIT
35
44
53 μs
900
1250
1500 ns
100
475
800 ns
10
80 ns
10
80 ns
150
160
180 °C
3.5
A
1.5
µs
800
µs
MIN MAX UNIT
500 kHz
1
μs
1
μs
200
ns
200
ns
1
ms
5
μs
20
μs
20
μs
5
μs
5
μs
7
9
11
6
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