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Interinar Electronics BSD-02LH Step Motor Driver www.interinar.com Table 1: 2-pin Terminal Block J1 Pin #

BSD-02LH User manual - 55966 Functional description of BSD-02LH Module

Pin Description The BSD-02LH module is the part of the BSD-02 family of drivers. The main difference is higher microstepping resolution. The BSD-02LH is suitable for driving bipolar and unipolar step motors from 50mA to 2.5A and up to 30V. Driver can operate in one of the 4 stepping modes: Full-, Half-, Quarter- or Sixteenth- Step without requiring any phase-sequence tables, high frequency control lines or complex interfaces to program. Ideal for applications where a complex microcontroller is unavailable or over-burdened. 1 GND - power ground. 2 +V
B - motor supply voltage. Min 8.0V , Max 30V. Table 2: 10-pin Header J2 (see Figure 2) Pin # Pin Description 1 ENABLE - input, active-low. When logic-low all outputs are enabled. When logic-high all outputs are disabled but Step and Direction signals are still processed in translator. Board has built in pull-up resistor so if this input is left disconnected the driver will be disabled. This input is also available on pin 1 of J4. 2 +5V DC - output. Up to 100mA can be drained from this pin to supply power to the external logic. May be left disconnected if not used. 3 SLEEP – input, active-low. When logic-low all outputs and most of the internal circuitry are disabled. When logic-high, normal operation resumed and translator set to home state. Board has built in pull-up resistor assuring normal operation if this input is left disconnected. This input may be left disconnected when not used. 4 RESET - input, active-low. When logic-low all outputs are off and translator is set to predefined home state. STEP input is ignored until RESET goes high. Board has built in pull-up resistor. This input may be left disconnected when not used. 5 DIRECTION - input. Determines the direction of the rotation of the motor. Depends on how motor was connected if low was Counter Clockwise then high will be Clockwise and vice- versa. Board has built in pull-up resistor. Also available on pin 3 of J4.
Figure 1 Step Motor Driver BSD-02 6 STEP - input. A low-to-high transition advances the motor one increment. The size of the increment is determined by MS1 and MS2 ( see Table65 and Table 7 ). Minimum Step Pulse Width is 1.0us. Minimum Step Low Time is 1.0us. Board has built in pull-up resistor. Also available on pin 2 of J4.

Features

see Table6 and Table 7
• +/- 2.5A, 30V Output Rating 7 MS2 - input. Together with MS1 determines the size of the increment of the rotation ( ). Board has built in pull-up resistor and jumper JP6 for convenience. Shipped with JP6 OFF (default).
• Synchronous rectification
• Crossover-Current Circuit Protection
• Under-Voltage Lockout Protection see Table6 and Table 7
• Thermal Shutdown Protection 8 MS1 - input. Together with MS2 determines the size of the increment of the rotation ( ). Board has built in pull-up resistor and jumper JP5 for convenience. Shipped with JP5 OFF (default).
• Automatic Current-Decay Mode
• Enable and Sleep Inputs
• Built-in Translator 9 HOME- output. Logic indicator of the initial state of the translator. At power up the translator is reset to the home state ( see Table10 for home state conditions ).
• Translator Home State Output 10 GND - signal ground.
• Reduced audible motor noise
• Increased step accuracy
• Low Quiescent Current (10mA MAX) Interinar Electronics BSD-02LH Step Motor Driver www.interinar.com - 1 - Rev.1.0 - 2 - Rev.1.0