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參數(shù)資料
| 型號(hào)： | L9935 |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | TWO-PHASE STEPPER MOTOR DRIVER |
| 中文描述： | 兩相步進(jìn)電機(jī)驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 16/19頁(yè) |
| 文件大?。?/td> | 159K |
| 代理商： | L9935 |
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ST
AND
BY
OFF
OFF
ON
11
ON
01
DEVICE
ON
CHECKS
FOR
ERRORS 11
CHECKING
FOR
ERRORS
01
CHECKING
FOR
ERRORS
10
LOGIC
SELECTS
BRANCHE
DEPENDING
ON
PREVIOUS
STATE
ON
CHECKING
FLYBACK 6
turn on
new telegram
no error
new telegram
flyback OK
telegram
new
telegram
new telegram current = 0
or reverse polarity
new
telegram
missing
flyback
different polarity
than before
shor
t
to gnd
short to VS
no short
no short
same polarity as before
short to VS
short
to gnd
sho
t
to gnd
shor
t
to VS
toVS
t
shottognd
short
to VS
short to gnd
new telegram
same polarity
D99AT441
Figure 11. Statediagram.
Remark: Return to stand by is possiblefrom every state
Note: Reversing polarity in low current mode no flyback check will be performed.
ElectromagneticEmission classification(EME)
ElectromagneticEmission classes presentel beloware typicaldata found on bench test. For detailed test
description please refer to ’Electromagnetic Emission (EME) Measurement of Integrated Circuits, DC to
1GHz’ of VDE/ZVEI work group 767.13 and VDE/ZVEI work group 767.14 or IEC project number 47A
1967Ed. This data is targeted to board designers to allow an estimation of emission filtering effort re-
quired in application.
Pin
EME class
10
Remark
GND
V
CC
EN, SDI, CSN, SCK, SDO in tristate
SDO
Power output A
1
, A
2
, B
1
, B
2
Power output A
1
, A
2
, B
1
, B
2
E
E
K
G
E
o
e
h
f
f
f
1
test
Blocked with 100nF close to the device
SDO in low-state, no data transfer
Sourcing output
Sinking output in chopping mode fOSC = 20kHz
5
6
ElectromagneticEmission is not testedin production.
L9935
16/19
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