DRV8825 Datasheet, PDF (6/22 Pages) Texas Instruments – STEPPER MOTOR CONTROLLER IC

DRV8825
SLVSA73C – APRIL 2010 – REVISED MAY 2011
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
POWER SUPPLIES
I_VM
VM operating supply current
I_VMQ VM sleep mode supply current
V_UVLO VM undervoltage lockout voltage
V3P3OUT REGULATOR
V_M = 24 V, f_PWM < 50 kHz
V_M = 24 V
V_M rising
V_3P3 V3P3OUT voltage
IOUT = 0 to 1 mA
3.2
LOGIC-LEVEL INPUTS
V_IL
Input low voltage
V_IH
Input high voltage
2.2
V_HYS Input hysteresis
0.3
I_IL
Input low current
VIN = 0
–20
I_IH
Input high current
VIN = 3.3 V
R_PD
Internal pulldown resistance
nHOME, nFAULT OUTPUTS (OPEN-DRAIN OUTPUTS)
V_OL
Output low voltage
I_OH
Output high leakage current
DECAY INPUT
I_O = 5 mA
V_O = 3.3 V
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 (up to 3.3 V)
R_PD
Internal pulldown resistance
H-BRIDGE FETS
HS FET on resistance
R_DS(ON)
LS FET on resistance
I_OFF
Off-state leakage current
MOTOR DRIVER
V_M = 24 V, I_O = 1 A, T_J = 25°C
V_M = 24 V, I_O = 1 A, T_J = 85°C
V_M = 24 V, I_O = 1 A, T_J = 25°C
V_M = 24 V, I_O = 1 A, T_J = 85°C
–20
f_PWM Internal current control PWM frequency
t_BLANK Current sense blanking time
t_R
Rise time
30
t_F
Fall time
30
PROTECTION CIRCUITS
I_OCP
Overcurrent protection trip level
3
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
ΔI_TRIP
Current trip accuracy
(relative to programmed value)
xVREF = 3.3 V, 10% - 34% current
setting
–15
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
5
8
mA
10
20
μA
7.8
8.2
V
3.3
3.4
V
0.6
0.7
V
5.25
V
0.45
0.6
V
20
μA
100
μA
100
kΩ
0.5
V
1
μA
0.8
V
V
±40
µA
130
kΩ
80
kΩ
0.2
0.25
0.32
Ω
0.2
0.25
0.32
20
μA
30
kHz
4
μs
200
ns
200
ns
A
160
180
°C
3
μA
660
685
mV
25
15
%
10
5
5
V/V
6
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