欢迎访问ic37.com |
会员登录 免费注册
发布采购

M54679FP 参数 Datasheet PDF下载

M54679FP图片预览
型号: M54679FP
PDF下载: 下载PDF文件 查看货源
内容描述: 两相步进电机驱动器 [2-Phase Stepper Motor Driver]
分类和应用: 驱动器光电二极管电动机控制电机
文件页数/大小: 13 页 / 238 K
品牌: RENESAS [ RENESAS TECHNOLOGY CORP ]
 浏览型号M54679FP的Datasheet PDF文件第3页浏览型号M54679FP的Datasheet PDF文件第4页浏览型号M54679FP的Datasheet PDF文件第5页浏览型号M54679FP的Datasheet PDF文件第6页浏览型号M54679FP的Datasheet PDF文件第8页浏览型号M54679FP的Datasheet PDF文件第9页浏览型号M54679FP的Datasheet PDF文件第10页浏览型号M54679FP的Datasheet PDF文件第11页  
M54679FP  
5. Oscillation circuit.  
External capacitor is charged and discharged by the constant current and a triangular waveform appears to Vref  
terminal.  
The waveform voltage level is shown in right figure.  
This triangular waveform is a carrier frequency of PWM circuit.  
The carrier frequency change if this external capacitor value is changed.  
M54679FP is designed that the oscillation frequency is 30kHz  
if the external capacitor value is 390pF.  
The oscillation frequency is in inverse proportion to the value of a external capacitor.  
2.5V  
0.5V  
6. Spike current can
Output power transistorent appears on the RS (current sensing) in a short time and this is  
caused by the internal dela
M54679FP has the cancellation he current sensing comparators do not cause error  
functions.  
So, the function of current sensing coms since the output power transistors go to ON.  
7. Ph signal delay circuit.  
M54679FP has a delay time of 3.0µs until output N since Ph signal change Low to high.  
This delay time is enough short time for the frequency ere is no problem in the normal  
function.  
8. Rs and S1 or S2 terminal.  
If S1 or S2 terminal (non-inverted input of the current sensing comst position of current  
sensing resistor, the error of the current sensing by means of wire resisecreased.  
9. Voltage stabilizer.  
M54679FP has a voltage stabilizer of 3.5V.  
The reference voltage (Vref) can connect the output (Regout)  
of voltage stabilizer directly.  
In this case, the current capability of the output of voltage stabilizer is 1.0mA (source current), 0.1mA (sink current).  
10. Setting output current.  
As the output circuit of M54679FP is designed by the bipolar type NPN transistors, the current that go through the  
motor coil is smaller about 15mA (typical) than the current that go through the current sensing resistor.  
This is caused by the base current of the power transistors.  
Therefore, be aware this base current when the output current is set.  
Rev.1.0, Sep.19.2003, page 7 of 12  
 复制成功!