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參數(shù)資料
| 型號： | UPD168116A |
| 廠商： | NEC Corp. |
| 英文描述： | 7-CHANNEL H-BRIDGE DRIVER WITH A MICRO STEP FUNCTION SUPPORTING PULSE INPUT |
| 中文描述： | 7通道H -橋甲微步支脈沖輸入功能驅動程序 |
| 文件頁數(shù)： | 17/26頁 |
| 文件大?。?/td> | 256K |
| 代理商： | UPD168116A |
Data Sheet S16967EJ1V0DS
17
μ
PD168116A
9. OPERATION DESCRIPTION
9.1 Output Current Setting
The peak value of the output current (100% of the current of ch1 (ch3) or ch2 (ch4) ) is determined by resistor R
FB
connected to FB
1
(FB
3
) or FB
2
(FB
4
) . This IC has reference power supply V
REF
(500 mV TYP.) for current
comparison, and performs driving with the current obtained from R
FB
and V
REF
as the peak output current.
Peak output current: I
MAX
(A)
V
REF
(V) ÷ R
FB
(
) x 1000
9.2 Pulse Output
The motor is driven by inputting a pulse to the CLK
1
(CLK
2
) pin. The operation advances by one pulse at the rising
edge of the CLK
1
(CLK
2
) signal.
9.3 Motor Revolution Direction Setting
CLK
1
(CLK
2
) is used to specify the motor revolution direction.
In the CW mode, the current of ch2 (ch4) is output, 90° degrees in phase behind the current of ch1 (ch3) .
In the CCW mode, the current of ch2 (ch4) is output, 90° degrees in phase ahead of the current of ch1 (ch3) .
9.4 Selecting 2-phase Excitation/Micro Step Drive Mode
The 2-phase excitation, 1-2 phase excitation, or micro step drive mode can be selected by using the MODE
1
to
MODE
4
pins.
Refer to
Table 6
1. Mode Pin Truth Table
for details.
Immediately after release of reset, the IC is initialized. In the 1-2 phase excitation and micro step drive mode,
excitation is started from the position where the output current of ch1 (ch3) is 100% and output current of ch2 (ch4) is
0%. In the 2-phase excitation drive mode, excitation is started from the position where the currents of both ch1 (ch3)
and ch2 (ch4) are +100%.
When the mode is changed from the micro step driving to the 2-phase excitation (or 1-2 phase excitation) , the
position of micro step is held until CLK is input. Pulse output is started by the first CLK input, the position is skipped to
the 2-phase position of the next quadrant (or to the closest 1-2 phase position at the rotation direction destination) ,
and driving is started.
Figure 9
1. Concept of Change Operation, Micro Step Driving
2-phase Excitation (1-2 Phase Excitation) .
poMicrostep stop
poMicrostep stop
2-phase excitation
stop position
(1)
Skipes to the next
quadrant
(4)
(3)
(2)
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| UPD168116AK9-9B4-A | 制造商:NEC 制造商全稱:NEC 功能描述:7-CHANNEL H-BRIDGE DRIVER WITH A MICRO STEP FUNCTION SUPPORTING PULSE INPUT |
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