EDE1204 Просмотр технического описания (PDF) - Unspecified
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EDE1204 Datasheet PDF : 7 Pages
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Connection via NPN-PNP Transistor H-Bridge (full EDE1204 schematic not shown)
This classic H-Bridge circuit makes use of matched NPN and PNP drive transistors. Note that four
2N2222 NPN transistors are used to interface between the EDE1204 and the H-Bridge circuit; any
small-signal NPN transistor may be substituted.
One suitable choice for the matched NPN-PNP pairs is the ZETEX ZTX690B NPN transistor are
ZETEX ZTX790A PNP transistor. These high-gain, high performance transistors are capable of
delivering a lot of current in a small modified TO-92 package; up to two Amps per coil can be
delivered using this pair (see transistor datasheets for exact figures). Alternately, any other type of
NPN-PNP pairs may be used - the choices are seemingly unlimited.
Again, note that with the above circuit the eight clamping diodes must be fast enough for the motor
speed you are using.
For further information on the use of the EDE1204 Bi-Polar Stepper Motor IC, or
the EDE1200 Unipolar Stepper Motor IC, download a copy of the E-Lab Stepper
Motor FAQ containing troubleshooting tips to common problems as well as
illustrating the connection of a 555 timer IC to the EDE1204 for variable speed
stepping. If you require assistance with your design please do not hesitate to
contact us for free engineering design-in assistance.
© COPYRIGHT 1998 E-LAB Digital Engineering, Inc. All rights reserved. Page 6
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