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| DRV8824-Q1_15 Datasheet, PDF (6/30 Pages) Texas Instruments – DRV8824-Q1 Automotive Motor Controller IC | |||
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DRV8824-Q1
SLVSCH0 â APRIL 2014
Electrical Characteristics (continued)
over operating free-air temperature range of -40°C to 125°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
H-BRIDGE FETS
VM = 24 V, I O = 1 A, TJ = 25°C
RDS(ON) HS FET on resistance
VM = 24 V, IO = 1 A, TJ = 85°C
VM = 24 V, IO = 1 A, TJ = 125°C
VM = 24 V, IO = 1 A, TJ = 25°C
RDS(ON) LS FET on resistance
VM = 24 V, IO = 1 A, TJ = 85°C
VM = 24 V, IO = 1 A, TJ = 125°C
IOFF
Off-state leakage current
â20
MOTOR DRIVER
fPWM
Internal PWM frequency
tBLANK
Current sense blanking time
tR
Rise time
VM = 24 V
100
tF
Fall time
VM = 24 V
80
tDEAD
Dead time
PROTECTION CIRCUITS
IOCP
Overcurrent protection trip level
1.8
tTSD
Thermal shutdown temperature Die temperature
150
CURRENT CONTROL
IREF
VTRIP
xVREF input current
xISENSE trip voltage
xVREF = 3.3 V
xVREF = 3.3 V, 100% current setting
xVREF = 3.3 V , 5% current setting
â3
635
â25%
ÎITRIP
Current trip accuracy
(relative to programmed value)
xVREF = 3.3 V , 10% - 34% current
setting
xVREF = 3.3 V, 38% - 67% current
setting
â15%
â10%
xVREF = 3.3 V, 71% - 100% current
setting
â5%
AISENSE Current sense amplifier gain
Reference only
7.6 Timing Requirements
1 fSTEP
2
tWH(STEP)
3
tWL(STEP)
4
tSU(STEP)
5
tH(STEP)
6 tENBL
7 tWAKE
Step frequency
Pulse duration, STEP high
Pulse duration, STEP low
Setup time, command to STEP rising
Hold time, command to STEP rising
Enable time, nENBL active to STEP
Wakeup time, nSLEEP inactive to STEP
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TYP
MAX UNIT
0.63
0.76
0.90
â¦
0.85
1
0.65
0.78
0.90
â¦
0.85
1
20
μA
50
kHz
3.75
μs
360
ns
250
ns
400
ns
5
A
160
180
°C
3
μA
660
685 mV
25%
15%
10%
5%
5
V/V
MIN MAX UNIT
250 kHz
1.9
μs
1.9
μs
200
ns
200
ns
200
ns
1
ms
6
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