參數(shù)資料
型號(hào)： TB62205F
元件分類： 運(yùn)動(dòng)控制電子
英文描述： STEPPER MOTOR CONTROLLER, 0.96 A, PDSO36
封裝： 0.450 INCH, 0.65 MM PITCH, PLASTIC, HSOP-36
文件頁(yè)數(shù)： 31/36頁(yè)
文件大?。?/td> 826K
代理商： TB62205F
TB62205F
2005-04-04
4
3.
Current feedback circuit and current setting circuit for motor driver
Function
The current setting circuit is used to set the reference voltage of the output current using the
micro-step current setting data input from the DATA pins.
The current feedback circuit is used to output to the output control circuit the relation between the
set current value and output current. This is done by comparing the reference voltage output to the
current setting circuit with the potential difference generated when current flows through the current
sense resistor connected between RS and VM.
The chopping waveform generator, to which a capacitor is connected, generates clock (OSC-CLK) used
as reference for the chopping frequency, so that these two circuits are pure digital logic.
Note 1: RS COMP1: Compares the set current with the output current and outputs a signal when the output current
reaches the set current.
Note 2: RS COMP2: Compares the set current with the output current at the end of Fast mode during chopping.
Outputs a signal when the set current is below the output current.
Use in charge mode
Waveform shaping circuit
Vref
Chopping waveform
generator circuit
M_OSC
Output
control circuit
Mixed
decay
timing
circuit
Output stop signal (ALL OFF)
Chopping reference circuit
0
Torque
control circuit
Current setting circuit
Torque
0.1
Torque
0.3
Logic
unit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Micro-
step
current
setting
selector
circuit
4-bit
D/A
circuit
RS COMP
circuit 1
(Note 1)
Use in fast mode
VM
RS
NF (set current reached signal)
Current feedback circuit
RNF (set current monitor signal)
VRS circuit 2
(detects
potential
difference
between
VM and RS)
RS COMP
circuit 2
(Note 2)
VRS circuit 1
(detects
potential
difference
between
RS and VM)
100%
75%
50%
25%
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相關(guān)代理商/技術(shù)參數(shù)
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