DRV8821_10 Datasheet, PDF (5/16 Pages) Texas Instruments – DUAL STEPPER MOTOR CONTROLLER/DRIVER

DRV8821
www.ti.com
SLVS912C – JANUARY 2009 – REVISED JANUARY 2010
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
V_M
I_MOT
V_REF
Motor power supply voltage range
Continuous motor drive output current⁽¹⁾
VREF input voltage
(1) Power dissipation and thermal limits must be observed.
MIN NOM MAX UNIT
8
32
V
1
1.5
A
1
4
V
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
POWER SUPPLIES
I_VM
V_M operating supply current
I_VMSD V_M shutdown supply current
V_UVLO V_M undervoltage lockout voltage
V_CP
Charge pump voltage
V_V3P3 V_V3P3 output voltage
LOGIC-LEVEL INPUTS
V_M = 24 V, no loads
V_M = 24 V, ABENBLn = CDENBLn = 1
V_M rising
Relative to V_M
V_IL
V_IH
V_HYS
I_IN
Input low voltage
Input high voltage
Input hysteresis
Input current
(internal pulldown current)
VIN = 3.3 V
OVERTEMPERATURE PROTECTION
t_TSD
Thermal shutdown temperature
MOTOR DRIVER
Die temperature
R_ds(on)
Motor #1 FET on resistance
(each individual FET)
V_M = 24 V, I_O = 0.8 A, T_J = 25°C
V_M = 24 V, I_O = 0.8 A, T_J = 85°C
R_ds(on)
Motor #2 FET on resistance
(each individual FET)
V_M = 24 V, I_O = 0.8 A, T_J = 25°C
V_M = 24 V, I_O = 0.8 A, T_J = 85°C
I_OFF
f_PWM
t_BLANK
Off-state leakage current
Motor PWM frequency⁽¹⁾
ITRIP blanking time⁽²⁾
t_F
Output fall time
t_R
Output rise time
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
(1) Factory option 100 kHz.
(2) Factory options for 2.5 ms, 5 ms or 6.25 ms.
MIN
TYP
MAX UNIT
5
8 mA
2.5 mA
6.5
8V
12
V
3.20
3.30
3.40 V
2
0.3
0.45
0.7 V
V
0.6 V
100 mA
150
°C
0.25
Ω
0.31
0.37
0.30
Ω
0.38
0.45
±12 mA
45
50
55 kHz
3.75
ms
50
300 ns
50
300 ns
1.5
3
4.5 A
2.5
ms
75
%
–3
3 mA
–5
5%
–10
10 %
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Product Folder Link(s): DRV8821
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