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STK673-010-E データシート(PDF) 6 Page - Sanyo Semicon Device

部品番号 STK673-010-E
部品情報  3-Phase Stepping Motor Driver Output Current 2.4A
Download  15 Pages
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メーカー  SANYO [Sanyo Semicon Device]
ホームページ  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

STK673-010-E データシート(HTML) 6 Page - Sanyo Semicon Device

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STK673-010-E
No.5708-6/15
Notes On Use
(1) Input terminal use of 5V system
[RESET and Clock (timing of input signal upon rising of power supply)]
The driver is configured to include a 5V system logic section and a 24V MOSFETs section. The MOSFETs on both
VCC1 side and GND side are N-channels. Thus, the MOSFETs on the VCC1 side is provided with a charging pump
circuit for generating a voltage higher than that of VCC1. When a Low signal is input to a RESET terminal for
operating the RESET, the charging pump is stopped. After the release of the RESET (High input), it requires a period of
1.7ms to rise the charging pump. Accordingly, even when a Clock signal is input during the rising of the charging pump
circuit, the MOSFET cannot be operated. Such a timing needs to be taken into consideration for inputting a Clock signal.
An example of timing is shown in Figure 1.
Figure 1. Timing chart of RESET signal and Clock signal
When the RESET terminal switches from Low to High where a High period is 1.7ms or longer and the Clock input is
conducted in a Low state, each phase current of the motor is maintained at the following values.
Phase
Current in the case where the initial Clock signal is maintained
at Low level (Other than 2-3-phase TU excitation)
Current in the case where the initial Clock signal is maintained
at Low level (2-3-phase TU excitation)
U phase
0
0
V phase
-87% of peak current during normal rotation
-100% of peak current during normal rotation
W phase
+87% of peak current during normal rotation
+100% of peak current during normal rotation
Refer to the timing charts for operations.
[Clock]
Clock signals should be input under the following conditions so that all 9 types of excitation modes shown in the
Excitation Mode Table.
Input frequency range
DC to 50kHz
Minimum pulse width
10
μs
High level duty
40 to 60%
When Mode C is not used, it is an operation based on rising of the Clock and thus the above-mentioned condition of
high level duty is negligible. A minimum pulse width of 10
μs or more allows excitation operation by Mode A and
Mode B. Since the operation is based on rising and falling of the Clock under the use of Mode C, it is most preferable to
set the high level duty to 50% so as to obtain uniform step-wise current widths.
[Mode A, Mode B, Mode C and TU]
These 4 terminals allow selection of excitation modes. For specific operations, refer to Excitation Mode Table and
Timing Charts.
ITF00809
Rising of 5V power supply
RESET signal input
Clock signal
> 10
μs
> 1.7ms


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