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DRV8818_12 Datasheet(数据表) 5 Page - Texas Instruments

部件型号  DRV8818
说明  STEPPER MOTOR CONTROLLER IC
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
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DRV8818 Datasheet(HTML) 5 Page - Texas Instruments

 
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DRV8818
www.ti.com
SLVSAX9A
– SEPTEMBER 2011 – REVISED FEBRUARY 2012
RECOMMENDED OPERATING CONDITIONS
TA = 25°C (unless otherwise noted)
MIN
NOM
MAX
UNIT
VM
Motor power supply voltage range(1)
8
35
V
VCC
Logic power supply voltage range
3
5.5
V
VREF
VREF input voltage
0
VCC
V
RX
RX resistance value
470
680
1500
k
Ω
CX
CX capacitance value
12
56
100
pF
(1)
All VM pins must be connected to the same supply voltage.
ELECTRICAL CHARACTERISTICS
TA = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Power Supplies
IVM
VM operating supply current
VM = 35 V, fPWM < 50 KHz
7
10
mA
IVCC
VCC operating supply current
fPWM < 50 KHz
0.4
4
mA
IVMQ
VM sleep mode supply current
VM = 35 V
3
20
μA
IVCCQ
VCC sleep mode supply current
0.5
20
μA
VM undervoltage lockout voltage
VM rising
6.7
7.5
VUVLO
V
VCC undervoltage lockout voltage
VCC rising
2.75
2.95
VREF Input/Current Control Accuracy
IREF
VREF input current
VREF = 3.3 V
–3
3
μA
VREF = 2.0 V, 70% to 100% current
–5
5
%
ΔICHOP
Chopping current accuracy
VREF = 2.0 V, 20% to 56% current
–10
10
%
Logic-Level Inputs
VIL
Input low voltage
0.3
× VCC
V
VIH
Input high voltage
0.7
× VCC
V
VHYS
Input hysteresis
300
mV
IIL
Input low current
VIN = 0.3
× VCC
–20
20
μA
IIH
Input high current
VIN = 0.3
× VCC
–20
20
μA
RPU
Pullup resistance
1
M
Ω
RPD
Pulldown resistance
1
M
Ω
HOMEn Output
VOL
Output low voltage
IO = 200 μA
0.3
× VCC
V
VOH
Output high voltage
IO = –200 μA
0.7
× VCC
V
Decay Input
VIL
Input low threshold voltage
For fast decay mode
0.21
× VCC
V
VIH
Input high threshold voltage
For slow decay mode
0.6
× VCC
V
H-Bridge FETS
Rds(on)
HS FET on resistance
VM = 24 V, IO = 2.5 A, TJ = 25°C
0.22
0.30
Rds(on)
LS FET on resistance
VM = 24 V, IO = 2.5 A, TJ = 25°C
0.15
0.24
IOFF
–20
20
μA
Motor Driver
tOFF
Off time
Rx = 56 k
Ω, Cx = 680 pF
35
44
53
μs
tBLANK
Current sense blanking time
Rx = 56 k
Ω, Cx = 680 pF
900
1250
1500
ns
tDT
Dead time
SRn = 0
100
475
800
ns
tR
Rise time
10
80
ns
tF
Fall time
10
80
ns
Copyright
© 2011–2012, Texas Instruments Incorporated
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