DRV8824 Datasheet, PDF (6/22 Pages) Texas Instruments – STEPPER MOTOR CONTROLLER IC

DRV8824
SLVSA06E – OCTOBER 2009 – REVISED AUGUST 2011
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range of -40°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
V_IL
Input low threshold voltage
For slow decay mode
V_IH
Input high threshold voltage
For fast decay mode
2
I_IN
Input current
R_PU
Internal pullup resistance
R_PD
Internal pulldown resistance
H-BRIDGE FETS
R_DS(ON) HS FET on resistance
V_M = 24 V, I _O = 1 A, T_J = 25°C
V_M = 24 V, I_O = 1 A, T_J = 85°C
R_DS(ON) LS FET on resistance
V_M = 24 V, I_O = 1 A, T_J = 25°C
V_M = 24 V, I_O = 1 A, T_J = 85°C
I_OFF
Off-state leakage current
–20
MOTOR DRIVER
f_PWM
Internal PWM frequency
t_BLANK
Current sense blanking time
t_R
Rise time
V_M = 24 V
100
t_F
Fall time
V_M = 24 V
80
t_DEAD
Dead time
PROTECTION CIRCUITS
I_OCP
Overcurrent protection trip level
1.8
t_TSD
Thermal shutdown temperature Die temperature
150
CURRENT CONTROL
I_REF
V_TRIP
xVREF input current
xISENSE trip voltage
xVREF = 3.3 V
–3
xVREF = 3.3 V, 100% current setting
635
xVREF = 3.3 V , 5% current setting
–25
xVREF = 3.3 V , 10% - 34% current
setting
–15
ΔI_TRIP
Current trip accuracy
(relative to programmed value)
xVREF = 3.3 V, 38% - 67% current
setting
–10
xVREF = 3.3 V, 71% - 100% current
setting
–5
A_ISENSE Current sense amplifier gain
Reference only
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TYP
MAX UNIT
0.8
V
V
±40
µA
130
kΩ
80
kΩ
0.63
Ω
0.76
0.90
0.65
Ω
0.78
0.90
20
μA
50
kHz
3.75
μs
360
ns
250
ns
400
ns
5
A
160
180
°C
3
μA
660
685 mV
25
15
%
10
5
5
V/V
6
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