LM9830VJD National Semiconductor, LM9830VJD Datasheet - Page 43
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LM9830VJD
Manufacturer Part Number
LM9830VJD
Description
Manufacturer
National Semiconductor
Datasheet
1.LM9830VJD.pdf
(45 pages)
Specifications of LM9830VJD
Operating Temperature (min)
0C
Operating Temperature (max)
70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
100
Package Type
TQFP
Lead Free Status / RoHS Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM9830VJD
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LM9830VJD/NOPB
Manufacturer:
Texas Instruments
Quantity:
10 000
Stepper Motor Current Controller Block Diagram
CR
CR
DAC code for
DAC code for
TriState Stepper
phase A
phase B
Motor Outputs
8
6
Phase A
Phase B
Invert
Invert
Generator
÷1 to 256
(50MHz)
high time
A
A
CRYSTAL IN
B
B
0/64 to
PWM
63/64
÷64
÷4
CR
CR
CR
3
3
DAC A:
0.125V,
0.191V,
0.353V,
0.462V,
DAC A:
0.125V,
0.191V,
0.353V,
0.462V,
0.500V
0.500V
Comparators need no hysteresis. SR flipflops are set periodi-
cally by pulse from PWM Generator. Flipflops can only be reset
after SR goes low when Reset (comparator output) is high
(V
Reset is level sensitive, not edge sensitive.
SENSE
–
+
+
–
> V
DAC
).
Reset
Reset
Set-Dominant
Set-Dominant
Set
Set
S/R Flipflop
S/R Flipflop
Q
Q
LM9830
SENSE1
SENSE2
A
A
HIGH CURRENT
B
B
GND SENSE
Phase A
Phase B
Stepper
Stepper
1
1
+24V
+24V
Phase A
Phase B
Stepper
Stepper
Optional zener speeds
decay when transistor
up motor current
is off. V
Z
~ 24V