Interinar Electronics BSD-02LH Step Motor Driver Interinar Electronics BSD-02LH Step Motor Driver

Table 1: 2-pin Terminal Block J1

Functional description of BSD-02LH Module Pin # 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 1 GND - power ground.
bipolar and unipolar step motors from 50mA to 2.5A and up to 30V. 2 +VB - motor supply voltage. Min 8.0V , Max 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
Table 2: 10-pin Header J2 (see Figure 2)
or complex interfaces to program. Ideal for applications where a complex microcontroller
is unavailable or over-burdened. Pin # Pin Description
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
1
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.
+5V DC - output. Up to 100mA can be drained from this pin to supply power to the external
2
logic. May be left disconnected if not used.
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
3
has built in pull-up resistor assuring normal operation if this input is left disconnected. This
input may be left disconnected when not used.
RESET - input, active-low. When logic-low all outputs are off and translator is set to
4 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.
DIRECTION - input. Determines the direction of the rotation of the motor. Depends on how
5 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
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
6
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 MS2 - input. Together with MS1 determines the size of the increment of the rotation (see
• +/- 2.5A, 30V Output Rating 7 Table6 and Table 7). Board has built in pull-up resistor and jumper JP6 for convenience.
• Synchronous rectification Shipped with JP6 OFF (default).
• Crossover-Current Circuit Protection
• Under-Voltage Lockout Protection MS1 - input. Together with MS2 determines the size of the increment of the rotation (see
• Thermal Shutdown Protection 8 Table6 and Table 7). 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 HOME- output. Logic indicator of the initial state of the translator. At power up the translator
9
• Built-in 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)

www.interinar.com -1- Rev.1.0 www.interinar.com -2- Rev.1.0