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STK672-532 数据表(PDF) 11 Page - ON Semiconductor |
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STK672-532 数据表(HTML) 11 Page - ON Semiconductor |
11 / 23 page STK672-532 No. A2111-11/23 Usage Notes 1. STK672-520, STK672-532 and STK672-540 input signal functions and timing (All inputs have no internal pull-up resistor.) [RESETB and CLOCK (Input signal timing when power is first applied)] As shown in the timing chart, a RESETB signal input is required by the driver to operate with the timing in which the F1 gate is turned on first. The RESETB signal timing must be set up to have a width of at least 10 μs, as shown below. The capacitor CO2, and the resistors RO3 and RO4 in the application circuit form simple reset circuit that uses the RC time constant rising time. However, when designing the RESETB input based on VIH levels, the application must have the timing shown in figure. Figure 1 RESETB and CLOCK Signals Input Timing [CLOCK (Phase switching clock)] • Input frequency: DC to 50kHz • Minimum pulse width: 10μs • Signals are read on the rising edge. [CWB (Motor direction setting)] The direction of rotation is switched by setting CWB to 1 (high) or 0 (low). See the timing charts for details on the operation of the outputs. Note: The state of the CWB input must not be changed during the 6.25 μs period before and after the rising edge of the CLOCK input. [ENABLE (Controls forced OFF for A, AB, B, and selects BB and selects operation/hold mode of the hybrid IC)] ENABLE=1: Normal operation ENABLE=0: Outputs A, AB, B, and BB forced to the off state. If, during the state where CLOCK signal input is provided, the ENABLE pin is set to 0 and then is later restored to the 1 state, the IC will resume operation with the excitation timing continued from before the point ENABLE was set to 0. Enable must be initially set high for input as shown in the timing chart. [MODE (Excitation mode selection)] MODE=0: 2-phase excitation MODE=1: 1-2 phase excitation See the timing charts for details on output operation in these modes. Note: The state of the MODE input must not be changed during the 5 μs period before and after the rising edge of the CLOCK input. Rise of the 5V supply voltage RESETB signal input CLOCK signal At least 10 μs At least 5 μs |
类似零件编号 - STK672-532 |
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类似说明 - STK672-532 |
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