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DRV8818_15 Datasheet, PDF (5/31 Pages) Texas Instruments – DRV8818 Stepper Motor Controller IC
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DRV8818
SLVSAX9D – SEPTEMBER 2011 – REVISED JANUARY 2015
7.4 Thermal Information
THERMAL METRIC(1)
DRV8818
PWP
UNIT
28 PINS
RθJA
RθJC(top)
RθJB
ψJT
ψJB
RθJC(bot)
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
32.2
16.3
14
°C/W
0.5
13.8
2.1
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
7.5 Electrical Characteristics
TA = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
POWER SUPPLIES
IVM
VM operating supply current
VM = 35 V, fPWM < 50 KHz
IVCC
VCC operating supply current
fPWM < 50 KHz
IVMQ
VM sleep mode supply current
VM = 35 V
IVCCQ VCC sleep mode supply current
VUVLO
VM undervoltage lockout voltage
VCC undervoltage lockout voltage
VM rising
VCC rising
VREF INPUT/CURRENT CONTROL ACCURACY
IREF
VREF input current
ΔICHOP Chopping current accuracy
VREF = 3.3 V
VREF = 2.0 V, 70% to 100% current
VREF = 2.0 V, 20% to 56% current
LOGIC-LEVEL INPUTS
VIL
Input low voltage
VIH
Input high voltage
VHYS Input hysteresis
IIL
Input low current
IIH
Input high current
RPU
Pullup resistance
RPD
Pulldown resistance
HOMEn OUTPUT
VIN = 0.3 × VCC
VIN = 0.3 × VCC
ENABLEn, RESETn
DIR, STEP, SLEEPn, USM1, USM0, SRn
VOL
Output low voltage
VOH
Output high voltage
DECAY INPUT
IO = 200 μA
IO = –200 μA
VIL
Input low threshold voltage
VIH
Input high threshold voltage
H-BRIDGE FETS
For fast decay mode
For slow decay mode
Rds(on)
Rds(on)
IOFF
HS FET on resistance
LS FET on resistance
VM = 24 V, IO = 2.5 A, TJ = 25°C
VM = 24 V, IO = 2.5 A, TJ = 25°C
MIN
TYP
MAX UNIT
7
10 mA
0.4
4 mA
3
20 μA
0.5
20 μA
6.7
7.5
V
2.75
2.95
–3
–5%
–10%
3 μA
5%
10%
0.7 × VCC
–20
–20
0.3 × VCC V
V
300
mV
20 μA
20 μA
1
MΩ
1
MΩ
0.7 × VCC
0.3 × VCC V
V
0.21 × VCC
V
0.6 × VCC
V
0.22
0.30 Ω
0.15
0.24 Ω
–20
20 μA
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