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PDF TB62269FTG Data sheet ( Hoja de datos )

Número de pieza TB62269FTG
Descripción PWM method CLK-IN bipolar stepping motor driver
Fabricantes Toshiba 
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TOSHIBA BiCD Integrated Circuit Silicon Monolithic
TB62269FTG
TB62269FTG
PWM method CLK-IN bipolar stepping motor driver
The TB62269FTG is a two-phase bipolar stepping motor driver using a PWM chopper.
Fabricated with the BiCD process, the TB62269FTG is rated at 40 V/1.8 A .
The internal voltage regulator allows control of the motor with a single
VM power supply.
Features
Drive control is possible in a bipolar stepping motor at 1 chip.
PWM controlled constant-current drive
Allows full, half and quarter ,1/8,1/16,1/32 step resolutions.
P-WQFN48-0707-0.50-003
Low on-resistance of output stage transistor is low by using BiCD process.
High Voltage and current (For specification, please refer to absolute
Weight:0.14g(Typ.)
maximum ratings and operation ranges)
Thermal shutdown (TSD)over-current shutdown (ISD),
and power-on reset of VM power supply (POR)
Built-in regulator allows the TB62269FTG to function with only VM power supply.
Able to customize PWM signal frequency by external resistance/capacitor.
Packages TB62269FTG : (P-WQFN48-0707-0.50-003)
Note) Please be careful about thermal conditions during use.
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TB62269FTG pdf
TB62269FTG
CLK Function
The electrical angle leads one by one in the manner of the clocks. The clock signal is reflected to the electrical angle
on the rising edge.
CLK Input
Rise
Fall
Function
The electrical angle leads one by one on the rising edge.
Remains at the same position.
ENABLE Function
The ENABLE pin controls whether the current is allowed to flow through a given phase for a stepper motor drive.
This pin selects whether the motor is stopped in Off mode or activated. The pin must be fixed to Low at power-on or
power-down of the TB62269FTG.
ENABLE Input
Function
H Output transistors are enabled (normal operation mode).
L Output transistors are disabled (high impedance state).
CW/CCW Function
The CW/CCW pin controls the rotation direction of the motor. When set to ‘Clockwise’, the current of OUTA is
output first, with a phase difference of 90°. When set to ‘Counter clockwise”, the current of OUTB is output first with
a phase difference of 90°.
CW/CCW Input
H
L
Function
Clock-wise
Counter clock-wise
OUT (+)
H
L
OUT (-)
L
H
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TB62269FTG arduino
TB62269FTG
Electrical Characteristics 2 (Ta = 25°C, VM = 24V, unless otherwise specified)
Characteristics
Symbol
Test Condition
Min Typ. Max Unit
Vref input current
Vref decay rate
TSD threshold
(Note 1))
Iref
Vref
(GAIN)
TjTSD
VM recovery voltage
Overcurrent trip threshold(Note 2)
Power-supply voltage for internal
circuit operation
VMR
ISD
VCC
Vref = 3.0 V
-
Vref = 2.0 V
1/4.8
- 140
Modes other than STANDBY
MODE
-
7.0
2.0
ICC=5.0mA
4.75
0
1/5.0
150
8.0
3.0
5.00
1.0
1/5.2
170
9.0
4.0
5.25
μA
°C
V
A
V
Note 1: Thermal shutdown (TSD) circuitry
When the junction temperature of the device reaches the threshold, the TSD circuitry is tripped, causing the
internal reset circuitry to turn off the output transistors.The TSD circuitry is tripped at a temperature between
140°C (min) and 170°C (max). Once tripped, the TSD circuitry keeps the output transistors off until the TSD
circuitry is released. The TSD status is released once the TB62269FTG is rebooted or all the
D_MODEpins(D_MODE0,1,2) are switched to Low(set to STANDBY status). The TSD circuitry does not
necessarily guarantee the complete safety of the device; therefore do not use the TSD circuitry actively.
Note 2: Overcurrent shutdown (ISD) circuitry
When the output current reaches the threshold, the ISD circuitry is tripped, causing the internal reset circuitry
to turn off the output transistors.To prevent the ISD circuitry from being tripped owing to switching noise, it has
a masking time of four CR oscillator cycles. Once tripped, it takes a maximum of four cycles to exit ISD mode
and resume normal operation.The ISD circuitry remains active until all the D_MODE(DMODE_0,1,2) pins are
switched to Low or the TB62269FTG is rebooted. The TB62269FTG remains in Standby mode while in ISD
mode.
Note 3: When the power supply voltage (VCC) for operating internal circuit is divided by the external resistor and used
as Vref input voltage, the accuracy of the output current setting value becomes ±8% together with the VCC
output voltage accuracy and the Vref decay ratio accuracy.
Note 4: Even when the logic input signal is input under the condition that the VM voltage is not supplied, the
electromotive force and the leakage current by the signal input are not generated. However, before VM is
rebooted, logic input signal should be controlled not to let the motor operating by rebooting VM.
Back-EMF
While a motor is rotating, there is a timing at which power is fed back to the power supply. At that timing, the
motor current is fed back to the power supply owing to the effect of the motor back-EMF.
If the power supply does not have enough sink capability, the power supply and output pins of the device might
rise above the rated voltages. The magnitude of the motor back-EMF varies with usage conditions and motor
characteristics. It must be fully verified that there is no risk that the TB62269FTG or other components will be
damaged or fail owing to the motor back-EMF.
Cautions on Overcurrent Shutdown (ISD) and Thermal Shutdown (TSD)
The ISD and TSD circuits are only intended to provide temporary protection against irregular conditions such as
an output short circuit; they do not necessarily guarantee complete IC safety.
If the device is used beyond the specified operating ranges, these circuits may not operate properly: then the
device may be damaged owing to an output short circuit.
The ISD circuit is only intended to provide temporary protection against an output short circuit. If such a
condition persists for a long time, the device may be damaged owing to overstress. Overcurrent conditions must
be removed immediately by external hardware.
IC Mounting
Do not insert devices in the wrong orientation or incorrectly. Otherwise, it may cause device breakdown, damage
and/or deterioration.
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