Digilent PmodHB2 - Manual

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Revision: 04/12/05
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Overview
The Digilent PmodHB2 1A H-Bridge Board (the
HB2™) can drive two motors independently
with up to 1A of current and voltage from 4.5V
to 12V.
Features include:
• dual 1A H-bridges
• 4.5V to 12V supply voltage
• screw terminals blocks for power
supply and motor connections
• logic level inputs
• industry standard TI SN754410 motor
driver chips
• a 6-pin header.
Functional Description
The HB2 is based on the Texas Instruments
SN754410, a dual H-bridge driver with bi-
directional drive currents.
Screw terminal blocks provide easy
connections to motor leads and power
supplies. All control input signals are
compatible with TTL and CMOS logic levels,
so the HB2 can be driven from any system
board.
The HB2 has ample capacitance to minimize
voltage drop when motor phases are switched
on. This allows motors to use power from the
same 6-pin cable that carries motor control
signals.
The HB2 has a 6-pin header for easy
connection to a Digilent system board. Some
system boards, like the Digilent Pegasus
board, have a 6-pin header that can connect to
the HB2 with a 6-pin cable. To connect the
HB2 to other Digilent system boards, a Digilent
Modular Interface Board (MIB) and a 6-pin cable
may be needed. The MIB plugs into the system
board, and the cable connects the MIB to the
HB2.
Digilent also produces an H-bridge board that
handles higher current and voltage, the Digilent
PmodHB1™ 5A H-Bridge Board. For more
information see,
www.digilentinc.com .
For more information about the TI SN754410
motor chip, see the corresponding Texas
Instruments data sheet at
www.ti.com .
EN
DIR
Motor
GND
Vcc Motor
Texas Instruments
SN754410
HB2 Circuit Diagram