MTO-EV004(TB67S179FTG)

Instruction manual for Evaluation Board of TB67S179FTG Aug 9, 2019 Rev.1.2 【Outline】 The TB67S179 is a two-phase unipolar stepping motor driver using a PWM chopper. The clock in decoder system and BiCD process are adopted. Rating of 80V and 1.5A is realized. This evaluation board mounts necessary components to evaluate the IC. Each excitation drive of full step, half step, quarter step, 1/8 step, 1/16 step, and 1/32 step can be run with PWM constant current drive. Please sense low noise and low vibration of the stepping motor. 【Note】 In using, please be careful about thermal condition sufficiently. As for each control signal, please refer to the IC specification by accessing to the below URL. http://toshiba.semicon-storage.com/us/product/linear/motordriver/detail.TB67S179FTG.html Further, the application of this evaluation board is limited to the purpose of evaluating and learning the motor control. Please do not ship them to a market. Connection to Evaluation board Reference voltage for motor current set Vref (0V to 3.6V) (Note) Silk name and signal name on the board are different because the series products have the common board. Silk name ERR ALM MO LOUT COUT DOUT 45 46 47 48 3 5 6 7 Signal name ERR ALM MO NC NC NC DMODE0 DMODE1 DMODE2 RESET CLK ENABLE CW/CCW BRAKE VrefB(for B-axis) Power source of VM (10V to 47V) VM GND Two-phase unipolar type Stepping motor Corresponding table (Silk name vs. Signal name) Setting evaluation board1 Setting motor current Setting motor current Iout(max) = Vref(V) x 3/4 Vref R351 R352 Mounted area Vref can be generated from the internal regulator (VCC) by mounting the divider resistance to R351 and R352. Please mount the divider resistance in generating Vref from the internal regulator (VCC). R351: VCC side, R352: GND side Relation between setting current and waveform of motor drive current Setting current Motor current (OUT(+)) Charge Charge Decay Charge Decay Decay （Fixed off time） （Fixed off time） （Fixed off time） Setting evaluation board2 Setting fixed off time Setting constant current PWM control Vref The TB67S179 drives with constant current PWM control. Fixed off time can be configured with pull-down resistance which is connected to OSCM pin. The relation between the pull-down resistance and the fixed off time is shown in the below table. Please adjust by referring to it. *The values in the table do not include variations in precision of the IC and external parts. They are reference data. *Please connect the standard resistance (10kΩ) even in the constant voltage mode. External Fixed off time (toff) resistance(ROSCM) 3.9kΩ 4.1µs 4.7kΩ 4.9µs 5.6kΩ 5.8µs 6.8kΩ 7.0µs 8.2kΩ 8.3µs 10kΩ 10µs 15kΩ 15µs 18kΩ 18µs 22kΩ 21µs 27kΩ 26µs 39kΩ 37µs Relation between fixed off time and waveform of motor drive current Setting current Motor current (OUT(+)) Charge Charge Decay Charge Decay Decay （Fixed off time） （Fixed off time） （Fixed off time） (Reference) Waveform of motor drive 【When the next current step is higher than the previous step CLOCK input signal 【When the next current step is lower than the previous step CLOCK input signal The next current step is below Motor output current Motor output current モータ出力電流 the previous step, and the motor current is above the new current step, it will automatically switch to decay sequence. Charge term will change. MO voltage (VCC pull up) When the current threshold (current step) is shifted to the next threshold (step), the ‘Charge’ time may change, but the ‘Decay (=off time)’ time will not. (The off time depends on the OSCM resistance.) MO voltage (VCC pull up) When the current step is shifted to the next step: if the motor current is above the PWM threshold, it will then go onto the decay sequence. If the motor current is below the next current step, it will continue on to the constant current PWM. Setting evaluation board3 Setting motor operation Fixed level by jumper JPCC Jumper indicated in the left figure is adopted on this evaluation board to set operation of the TB67S179FTG. To select the function by the jumper, short-circuit JPCC. Fixed level of the silk near the jumper is indicated inside the white frame. Please change the short position according to the configuration of the usage function. In case of inputting the signal externally, please remove the short pin. Circuit of evaluation board JPCC VM R38 R39 R40 C33 ZD VREF ERR R351 ALM R352 MO R37 CON3 C311 C312 COMB C35 36 35 34 33 32 31 30 29 28 27 26 25 39 22 40 21 41 20 IC mounted area 42 DOUT 43 SW45 45 C23 23 C19 38 17 45 16 46 15 47 14 48 13 2 3 4 5 6 7 OUTB- 18 44 1 CON1 19 C17 COUT 24 OUTA- C13 LOUT OUTB+ 37 OUTA+ 8 9 10 11 12 SW46 COMA 46 SW47 CON2 48 3 5 SW7 SW6 SW5 SW3 SW48 47 6 7 ◆ Important Note ◆ ●This product was not designed for use with devices which could cause personal injury in the event of failure or malfunction, including devices for use in areas including medical, military, aviation, aerospace, nuclear control, other types of safety mechanisms, etc., or for use in devices which require a high standard of safety. Do not use this product for such applications. This company assumes no liability for damages which may result from use of the product. Manufactured and Distributed by https://www.marutsu.com Marutsuelec Co., Ltd. 5-2-2, Seiki Daiichi Building 7F, Sotokanda, Chiyoda-ku, Tokyo 101-0021, Japan Tel：+81-3-6803-0209 FAX：+81-3-6803-0213