DRV8821_15 Datasheet, PDF (6/23 Pages) Texas Instruments – DUAL STEPPER MOTOR CONTROLLER/DRIVER

DRV8821
SLVS912I – JANUARY 2009 – REVISED JANUARY 2014
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
I_OCP
Overcurrent protect level
t_OCP
Overcurrent protect trip time
t_MD
Mixed decay percentage
Measured from beginning of PWM cycle
VREF INPUT/CURRENT CONTROL ACCURACY
I_REF
xVREF input current
ΔI_CHOP Chopping current accuracy
xVREF = 3.3 V
xVREF = 2.5 V, derived from V3P3;
71% to 100% current
xVREF = 2.5 V, derived from V3P3;
20% to 56% current
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MIN
TYP
MAX UNIT
1.5
3
4.5 A
2.5
μs
75
%
–3
3 μA
–5
5%
–10
10 %
6
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