TB62201AF
TOSHIBA Bi−CMOS PROCESSOR IC SILICON MONOLITHIC
TB62201AF
DUAL−STEPPING MOTOR DRIVER IC FOR OA EQUIPMENT USING PWM CHOPPER
TYPE
The TB62201AF is a dual−stepping motor driver driven by
chopper micro−step pseudo sine wave.
To drive two−phase stepping motors, Two pairs of 16−bit latch
and shift registers are built in the IC. The IC is optimal for
driving stepping motors at high efficiency and with low−torque
ripple.
The IC supports Mixed Decay mode for switching the attenuation
ratio at chopping. The switching time for the attenuation ratio
can be switched in four stages according to the load.
FEATURES
Two stepping motors driven by micro−step pseudo sine wave
are controlled by a single driver IC
Monolithic Bi−CMOS IC
Low ON−resistance of Ron = 0.5
Ω
(T
j
= 25°C @1.0 A: Typ.)
ESD protection Exceeds 2000 V, MIL−STD−883D
Two pairs of built−in 16−bit shift and latch registers
Two pairs of built−in 4−bit DA converters for micro steps
Built−in ISD, TSD, V
DD
&V
M
power monitor (reset) circuit for protection
Built−in charge pump circuit (two external capacitors)
36−pin power flat package (HSOP36−P−450−0.65)
Output voltage : 40 V max
Output current : 1.5 A / phase max
Built−in Mixed Decay mode enables specification of four−stage attenuation ratio.
(The attenuation ratio table can be overwritten externally.)
Chopping frequency can be set by external resistors and capacitors. High−speed chopping possible at 100 kHz or
higher.
Note:
When using the IC, pay attention to thermal conditions.
These devices are easy damage by high static voltage.
In regards to this, please handle with care.
Weight: 0.79 g (Typ.)
1
2003-10-07
TB62201AF
2. Logic unit A / B (C / D unit is the same as A / B unit)
Function
This circuit is used to input from the DATA pins micro−step current setting data and to transfer them to the
subsequent stage. By switching the SETUP pin, the data in the mixed decay timing table can be overwritten.
Note:
The RESET and SETUP pins are pulled down in the IC by 10 kΩ resistor.
When not using these pins, connect them to GND. Otherwise, malfunction may occur.
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2003-10-07
TB62201AF
3. Current feedback circuit and current setting circuit
(A / B unit (C / D unit is the same as A
/ B unit)
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 V
M
.
The chopping waveform generator circuit to which CR is connected is used to generate clock used as
reference for the chopping frequency.
Note 1: RS COMP 1: Compares the set current with the output current and outputs a signal when the output current
reaches the set current.
Note 2: RS COMP 2: 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.
4
2003-10-07
TB62201AF
4. Output control circuit, current feedback circuit and current setting circuit
(A / B unit (C
/ D unit is the same as A / B unit)
Note:
The RESET pins is pulled down in the IC by 10−kΩ resistor.
When not using the pin, connect it to GND. Otherwise, malfunction may occur.
5
2003-10-07
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