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DRV8824
www.ti.com
SLVSA06E –OCTOBER 2009– REVISED AUGUST 2011
THERMAL INFORMATION
DRV8824
THERMAL METRIC PWP UNITS
28 PINS
θ
JA
Junction-to-ambient thermal resistance
(1)
38.9
θ
JCtop
Junction-to-case (top) thermal resistance
(2)
23.3
θ
JB
Junction-to-board thermal resistance
(3)
21.2
°C/W
ψ
JT
Junction-to-top characterization parameter
(4)
0.8
ψ
JB
Junction-to-board characterization parameter
(5)
20.9
θ
JCbot
Junction-to-case (bottom) thermal resistance
(6)
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, ψ
JT
, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining θ
JA
, using a procedure described in JESD51-2a (sections 6 and 7).
(5) The junction-to-board characterization parameter, ψ
JB
, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining θ
JA
, 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 NOM MAX UNIT
V
M
Motor power supply voltage range
(1)
8.2 45 V
V
REF
VREF input voltage
(2)
1 3.5 V
I
V3P3
V3P3OUT load current 1 mA
(1) All V
M
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 TEST CONDITIONS MIN TYP MAX UNIT
POWER SUPPLIES
I
VM
VM operating supply current V
M
= 24 V, f
PWM
< 50 kHz 5 8 mA
I
VMQ
VM sleep mode supply current V
M
= 24 V 10 20 μA
V
UVLO
VM undervoltage lockout voltage V
M
rising 7.8 8.2 V
V3P3OUT REGULATOR
IOUT = 0 to 1 mA, V
M
= 24 V, T
J
= 25°C 3.18 3.30 3.42
V
3P3
V3P3OUT voltage V
IOUT = 0 to 1 mA 3.10 3.30 3.50
LOGIC-LEVEL INPUTS
V
IL
Input low voltage 0.6 0.7 V
V
IH
Input high voltage 2 5.25 V
V
HYS
Input hysteresis 0.45 V
I
IL
Input low current VIN = 0 –20 20 μA
I
IH
Input high current VIN = 3.3 V 100 μA
nENBL, nRESET, DIR, STEP, MODEx 100 kΩ
R
PD
Internal pulldown resistance
nSLEEP 1 MΩ
nHOME, nFAULT OUTPUTS (OPEN-DRAIN OUTPUTS)
V
OL
Output low voltage I
O
= 5 mA 0.5 V
I
OH
Output high leakage current V
O
= 3.3 V 1 μA
DECAY INPUT
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