參數(shù)資料
型號: TB62202AFG
廠商: Toshiba Corporation
英文描述: Dual-Stepping Motor Driver IC for OA Equipment Using PWM Chopper Type
中文描述: 雙辦公自動化設(shè)備步進(jìn)馬達(dá)驅(qū)動IC用PWM斬波型
文件頁數(shù): 23/84頁
文件大?。?/td> 1272K
代理商: TB62202AFG
TB62202AFG
2005-04-04
23
CR Circuit Constants
OSC circuit oscillation waveform
The OSC circuit generates the chopping reference signal by charging and discharging the external capacitor Cosc
through current supplied from the external resistor Rosc in the OSC block.
Voltages E1 and E2 in the diagram are set by dividing the V
DD
by approximately 3
/
5 (E1) and 2
/
5 (E2).
The actual current chopping time is 1
/
8 the CR frequency.
[Important: Setting the CR Circuit Constants]
The CR oscillation waveform is converted in the IC to the CLK waveform (CR-CLK signal) and used for control.
If the CR waveform discharge time is set outside the range shown below, the operation of the IC is not guaranteed.
Be sure to set the CR waveform discharge time within the following range.
600 ns > t (CR discharge) > 400 ns
E1
E2
t
=
0
t
=
1
t
=
2
t (CR-charge)
t (CR-dis-charge)
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