參數(shù)資料
型號: μPD780983
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述: 8位單片機(jī)微控制器(8位單片微控制器)
文件頁數(shù): 16/121頁
文件大?。?/td> 350K
代理商: ΜPD780983
CHAPTER 1 OVERVIEW OF FUNCTIONS
16
Figure 1-2 shows the switching timing of the normal phase output.
When switching occurs at the intersection of the sawtooth and sine waves, a waveform like that indicated by a is
generated. However, depending on the complexity of the processing and the number of settings, the sample
application simulates switching at the timing indicated by b.
Figure 1-2. Switching Timing
Normal phase output a
Normal phase output b
1.2 DEAD TIME
To prevent the positive and negative transistors of each phase from going on together, dead time is inserted into
the PWM output. The dead time can be set, by key input, to a value of between 1
μ
s and 32
μ
s, the output of the
PWM signal being driven low after the elapse of the previously set delay.
Figure 1-3. Dead Time
Dead time
Dead time
Normal phase output
Inverted phase output
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