DRV8824
www.ti.com
SLVSA06E –OCTOBER 2009–REVISED AUGUST 2011
THERMAL INFORMATION
DRV8824
THERMAL METRIC
PWP
28 PINS
38.9
UNITS
θJA
Junction-to-ambient thermal resistance(1)
Junction-to-case (top) thermal resistance(2)
Junction-to-board thermal resistance(3)
Junction-to-top characterization parameter(4)
Junction-to-board characterization parameter(5)
Junction-to-case (bottom) thermal resistance(6)
θJCtop
θJB
23.3
21.2
°C/W
ψJT
0.8
ψJB
20.9
θJCbot
2.6
(1) The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, as
specified in JESD51-7, in an environment described in JESD51-2a.
(2) The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific
JEDEC-standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
(3) The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB
temperature, as described in JESD51-8.
(4) The junction-to-top characterization parameter, ψJT, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining θJA, using a procedure described in JESD51-2a (sections 6 and 7).
(5) The junction-to-board characterization parameter, ψJB, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining θJA , using a procedure described in JESD51-2a (sections 6 and 7).
(6) The junction-to-case (bottom) thermal resistance is obtained by simulating a cold plate test on the exposed (power) pad. No specific
JEDEC standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
RECOMMENDED OPERATING CONDITIONS
MIN
8.2
1
NOM
MAX
45
UNIT
V
VM
Motor power supply voltage range(1)
VREF input voltage(2)
VREF
IV3P3
3.5
1
V
V3P3OUT load current
mA
(1) All VM pins must be connected to the same supply voltage.
(2) Operational at VREF between 0 V and 1 V, but accuracy is degraded.
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range of -40°C to 85°C (unless otherwise noted)
PARAMETER
POWER SUPPLIES
TEST CONDITIONS
MIN
TYP
MAX
UNIT
IVM
VM operating supply current
VM sleep mode supply current
VM = 24 V, fPWM < 50 kHz
5
10
8
20
mA
μA
V
IVMQ
VUVLO
V3P3OUT REGULATOR
VM = 24 V
VM undervoltage lockout voltage VM rising
7.8
8.2
IOUT = 0 to 1 mA, VM = 24 V, TJ = 25°C
3.18
3.10
3.30
3.30
3.42
3.50
V3P3
V3P3OUT voltage
V
IOUT = 0 to 1 mA
LOGIC-LEVEL INPUTS
VIL
VIH
VHYS
IIL
Input low voltage
0.6
0.7
V
V
Input high voltage
Input hysteresis
Input low current
Input high current
2
5.25
0.45
V
VIN = 0
–20
20
μA
μA
kΩ
MΩ
IIH
VIN = 3.3 V
100
nENBL, nRESET, DIR, STEP, MODEx
nSLEEP
100
1
RPD
Internal pulldown resistance
nHOME, nFAULT OUTPUTS (OPEN-DRAIN OUTPUTS)
VOL
IOH
Output low voltage
IO = 5 mA
VO = 3.3 V
0.5
1
V
Output high leakage current
μA
DECAY INPUT
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