參數(shù)資料
型號(hào): LM9830VJD
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 消費(fèi)家電
英文描述: EuroDOCSIS 2.0 Diplexer Filter w/surge protection
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝: PLASTIC, TQFP-100
文件頁數(shù): 43/45頁
文件大?。?/td> 566K
代理商: LM9830VJD
+24V
+
Reset
A
A
Phase A
Invert
Set-Dominant
S/R Flipflop
+24V
B
B
Stepper
Phase A
Stepper
Phase A
Stepper
Phase B
Stepper
Phase B
DAC code for
phase A
3
SENSE1
SENSE2
HIGH CURRENT
GND SENSE
1
1
DAC A:
0.125V,
0.191V,
0.353V,
0.462V,
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
SENSE
> V
DAC
).
Reset is level sensitive, not edge sensitive.
÷4
÷1 to 256
8
÷64
PWM
Generator
0/64 to
63/64
high time
6
CR
CR
+
Reset
Set-Dominant
S/R Flipflop
3
DAC A:
0.125V,
0.191V,
0.353V,
0.462V,
0.500V
Set
Set
CRYSTAL IN
(50MHz)
Optional zener speeds
up motor current
decay when transistor
is off. V
Z
~ 24V
DAC code for
phase B
A
A
Q
Q
Phase B
Invert
B
B
TriState Stepper
Motor Outputs
CR
CR
CR
LM9830
Stepper Motor Current Controller Block Diagram
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