DRV8824 Datasheet, PDF (5/22 Pages) Texas Instruments – STEPPER MOTOR CONTROLLER IC

DRV8824
www.ti.com
SLVSA06E – OCTOBER 2009 – REVISED AUGUST 2011
THERMAL INFORMATION
DRV8824
THERMAL METRIC
PWP
UNITS
θ_JA
θ_JCtop
θ_JB
ψ_JT
ψ_JB
θ_JCbot
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⁾
28 PINS
38.9
23.3
21.2
0.8
20.9
2.6
°C/W
(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
V_M
V_REF
I_V3P3
Motor power supply voltage range⁽¹⁾
VREF input voltage⁽²⁾
V3P3OUT load current
(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.
MIN
NOM
MAX UNIT
8.2
45
V
1
3.5
V
1
mA
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range of -40°C to 85°C (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, V_M = 24 V, T_J = 25°C
IOUT = 0 to 1 mA
3.18
3.10
LOGIC-LEVEL INPUTS
V_IL
Input low voltage
V_IH
Input high voltage
2
V_HYS
Input hysteresis
I_IL
Input low current
VIN = 0
–20
I_IH
Input high current
VIN = 3.3 V
nENBL, nRESET, DIR, STEP, MODEx
R_PD
Internal pulldown resistance
nSLEEP
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
TYP
MAX UNIT
5
8 mA
10
20
μA
7.8
8.2
V
3.30
3.42
V
3.30
3.50
0.6
0.7
V
5.25
V
0.45
V
20
μA
100
μA
100
kΩ
1
MΩ
0.5
V
1
μA
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