tb62212ftag TOSHIBA Semiconductor CORPORATION, tb62212ftag Datasheet - Page 13

• Manufacturer Part Number: tb62212ftag
• Description: Pwm Chopper Type Dual-stepping Motor Driver
• Manufacturer: TOSHIBA Semiconductor CORPORATION

3. Function Table for Motor Drive Mode Selection
4. D_tBLANK Input Pin Function
Note: When D_tBLANK is Low, only the analog tBLANK time is provided.
Stepping Motor Mode
300 ns).Each motor is controlled via two logic control inputs, PHASE (current direction) and ENABLE
(ON/OFF), and via the Vref input for constant-current control.
Brushed DC Motor Mode
where OSC is a reference signal for chopper circuit.
prevent this current spike from erroneously tripping the constant-current sensor, the constant-current sensor
is digitally blanked for a period of time that is determined by tBLANK, which is derived from the OSC signal.
over-current can be observed only during blank times.
Combination Mode
with the same characteristics are operated in parallel.
(Specifications actually include the thermal capacitance as well. See electrical characteristics for more
details.)
together on the board.
the shorted pins may experience a current imbalance and more current may flow into either one of them than
the other.
not support dynamic mode switching.
This mode is used to drive stepping motors.The tBLANK time is specified as a fixed analog value (about
This mode is used to drive brushed DC motors.
The tBLANK time can be specified as a fixed analog value, or as three OSC cycles in digital tBLANK mode,
When DC motors are driven under PWM control, a discharge current spike can occur due to a varistor. To
Using this blanking function enables constant-current limiter control, as well as external PWM control. An
The Combination mode, such as DC (L) and Stepper (L) modes, can be selected when two units of H-bridges
In this mode, the actual ON-resistance is reduced by half while the current capability is doubled.
To use this mode, the power supply, ground, and output pins that have identical names should be shorted
At the same time, the wirings of a board should be routed to balance the impedance at each pin. Otherwise,
D_tBLANK
Motor drive modes can be selected depending on the type of motors to be driven.
The configuration of H-bridge drivers and control category are changed according to the selected mode.
There is basically no need to change drive modes during motor operation. Thus, the TB62212FTAG does
Changing the settings of these pins changes the functions and timing of control pins.
The setting of mode select pins must not be changed after the TB62212FTAG is powered on.
MODE 0
H
L
H
H
H
H
L
L
L
L
OFF: Digital Blank Time = OSC × 0
ON: Digital Blank Time = OSC × 3
MODE 1
H
H
H
H
L
L
L
L
Motor Drive Mode
(only in DC Motor mode)
MODE 2
H
H
H
H
L
L
L
L
13
DC (L) (Combination) × 1 + Stepper S
Inhibit (For Toshiba testing only)
Stepping (L) (Combination) × 1
DC (L) (Combination) × 2
DC (S) × 2 + Stepper S
Stepping (S) × 2
Standby mode
Drive Mode
DC (S) × 4
TB62212FTAG
2010-10-05