This manual provides layout, signal definitions, jumper settings, and motor current configuration for the Toshiba TB67S109AFTG evaluation board.
The TB67S109AFTG evaluation board is designed to evaluate the TB67S109A two‑phase bipolar stepping motor driver. It includes all necessary components to test full‑step, half‑step, and micro‑stepping modes with PWM constant‑current drive, allowing low‑noise and low‑vibration motor operation.
The document details the board’s silk‑screen to signal mapping, how to set motor current and chopping frequency, and the jumper configurations required to select operating modes. It also provides recommended voltage ranges and component values for proper operation.
| Power supply voltage (VM) | 10 V to 47 V |
|---|---|
| Reference voltage for motor current (Vref) | 0 V to 3.6 V |
| Recommended chopping frequency (fchop) | 40 kHz to 150 kHz |
| Capacitor used for chopping frequency | 270 pF |
| Resistor used for chopping frequency | 5.1 kΩ |
| Decay ratio of VREF | 1/5.0 (typ.) |
The board operates with a VM supply voltage between 10 V and 47 V.
Motor current is set by adjusting the VREF voltage (0 V to 3.6 V) using the R_VRF1 and R_VRF2 resistors and the JP_VRF1 jumper.
A chopping frequency (fchop) between 40 kHz and 150 kHz is recommended.
Short‑circuit JP_VCC or apply a high‑level voltage to the VDD pin to select functions; adjust other jumpers (e.g., JP_VRF1, JP_VRF2) as described.