Datasheet

DRV8844
www.ti.com SLVSBA2A –JULY 2012–REVISED OCTOBER 2012
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range, all voltages relative to VNEG terminal (unless otherwise noted)
MIN NOM MAX UNIT
V
M
Motor power supply voltage range
(1)
8 60 V
I
V3P3
V3P3OUT load current 0 10 mA
(1) All V
M
pins must be connected to the same supply voltage.
ELECTRICAL CHARACTERISTICS
T
A
= 25°C, over operating free-air temperature range, all voltages relative to VNEG terminal (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
POWER SUPPLIES
I
VM
VM operating supply current V
M
= 24 V, f
PWM
< 50 kHz 1 5 mA
I
VMQ
VM sleep mode supply current V
M
= 24 V 500 800 μA
V
UVLO
VM undervoltage lockout voltage V
M
rising 6.3 8 V
V3P3OUT REGULATOR
V
3P3
V3P3OUT voltage IOUT = 0 to 1 mA 3.18 3.3 3.52 V
LOGIC-LEVEL INPUTS
V
IL
Input low voltage LGND + 0.6 LGND + 0.7 V
V
IH
Input high voltage LGND + 2.2 LGND + 5.25 V
V
HYS
Input hysteresis 50 600 mV
I
IL
Input low current VIN = LGND –5 5 μA
I
IH
Input high current VIN = LGND + 3.3 V 100 μA
R
PD
Internal pulldown resistance 100 kΩ
nFAULT OUTPUT (OPEN-DRAIN OUTPUT)
V
OL
Output low voltage I
O
= 5 mA LGND + 0.5 V
I
OH
Output high leakage current V
O
= LGND + 3.3 V 1 μA
H-BRIDGE FETS
V
M
= 24 V, I
O
= 1 A, T
J
= 25°C 0.24
HS FET on resistance
V
M
= 24 V, I
O
= 1 A, T
J
= 85°C 0.29 0.39
R
DS(ON)
Ω
V
M
= 24 V, I
O
= 1 A, T
J
= 25°C 0.24
LS FET on resistance
V
M
= 24 V, I
O
= 1 A, T
J
= 85°C 0.29 0.39
I
OFF
Off-state leakage current –2 2 μA
PROTECTION CIRCUITS
I
OCP
Overcurrent protection trip level 3 A
t
DEAD
Output dead time 90 ns
t
OCP
Overcurrent protection deglitch time 5 µs
T
TSD
Thermal shutdown temperature Die temperature 150 160 180 °C
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