technology to greatly reduce size
without sacrificing features. Both
are exceptionally small, easy to in-
terface and use, and yet powerful
enough to handle the most demand-
ing applications. Because the
IM483H and IM805H share a com-
mon package and pin configuration,
they offer flexibility in that the sys-
tem designer can increase or de-
crease the power of the system as
needed without the need to rede-
sign the interface to the drive.
The IM483H and IM805H have 14
built-in microstep resolutions (both
binary and decimal). The resolution
can be changed at any time without
the need to reset the driver. This
feature allows the user to rapidly
move long distances, yet precisely
position the motor at the end of
travel without the expense of high-
performance controllers. In many in-
stances mechanical gearing can be
replaced with microstepping. This
reduces cost and system size, and
eliminates potential maintenance
while increasing accuracy and
smoothness.
With the development of proprietary
and patented circuits, ripple current
has been minimized to reduce the
motor heating that is common with
other designs. This feature allows
the use of low inductance motors
to improve high-speed performance
and system efficiency.
The IM483H/IM805H microstep-
ping hybrids are designed to be sol-
dered directly into a PC board. This
eliminates the need for wiring and
mounting, thus saving design and
assembly time, reducing system
cost and increasing reliability.
The ultra-small size reduces the
overall space required in your sys-
tem. In addition, each unit is 100%
tested and comes with a 2-year
warranty.
Available as options for the
IM483H/IM805H are the HFC-22
Heat Sink/Fan/Clip assembly and
the PR-22 Pin Receptacles with
throwaway carrier. The HFC-22
provides a unique cooling solution
and was designed specifically for
the IM483H and IM805H
Microstepping Hybrid Drivers. The
HFC-22 will easily maintain a reli-
able rear plate temperature with-
out using large heat sinks and cum-
bersome mounting hardware. The
heat sink and fan are easily
mounted to the driver by means
of a removable clip developed by
IMS, and when fully assembled with
the IM483H or IM805H takes up
only 6.8 in3 of space!
For applications where ease of re-
moval is required, the PR-22 pro-
vides a reliable, high quality recep-
tacle which comes attached to a
high temperature plastic throw-
away carrier that facilitates wave
soldering.
These drives, because of their ul-
tra-small size, advanced technol-
ogy and low-cost, provide design-
ers with affordable state-of-the-art
solutions for the competitive edge
needed in today’s market.
FEATURES
•Very Low Cost
•Ultra Miniature Size
(2.10 x 2.6 x 0.362 inches)
(53.34 x 66.04 x 9.19 mm)
•Advanced Hybrid Design
•High Input Voltage (+12 to
+48VDC/+24 to +75VDC)
•High Output Current (3A RMS,
4A Peak/5A RMS, 7A Peak)
•Up to 10MHz Step Clock Rate
•No Minimum Inductance
•FAULT Input and Output
•Short Circuit and Over
Temperature Protection
•Microstep Resolution to 51,200
Step/Rev. (1.8° Motor)
•Microstep Resolutions can be
Changed “On-The-Fly” Without
Loss of Motor Position
•20 kHz Chopping Rate
•Automatically Switches Between
Slow and Fast Decay for
Unmatched Performance
•14 Selectable Resolutions Both in
Decimal and Binary
•Adjustable Automatic Current
Reduction
•At Full Step Output
•Optional Cooling Fan (HFC-22)
•Optional Receptacle Carrier (PR-22)
DESCRIPTION
The IM483H and IM805H are high
performance, low-cost microstepping
drivers that utilize advanced hybrid
OPTION: Hybrid
Mounted with
Optional HFC-22
Heat Sink/
Fan/Clip
Assembly.
IM483H/IM805H SPECIFICATIONS
ELECTRICAL
Input Voltage (Motor)* _________ +12 to +48 VDC/+24 to +75 VDC
Input Voltage (Logic) ____________________________________ +5 VDC
Output Current (Per Phase) ___________3 Amps (RMS), 4A (Peak)/
5A (RMS), 7A (peak)
Step Clock Frequency (Max) ______________________________ 10MHz
Steps per Revolution (1.8° Motor) 400, 800, 1000, 1600, 2000,
3200, 5000, 6400, 10000,
12800, 25000, 50000, 51200
Protection _____________________________ Thermal, Phase to Phase,
VIN to Phase
*Includes motor back EMF.
TEMPERATURE
Storage _________________________________________ -40 to +125° C
Rear Mounting Surface _____________________________ 0 to +65° C
OPTIONS
TN-22H _______________________ Thermal Pad (Included with Driver)
HFC-22 ___________________________ Heat Sink/Fan/Clip Assembly
INT-483H/INT-805H _____________________ Driver Interface Board
IM483H/IM805H-DK1 ___________________________ Developer’s Kit
(Includes Driver, Interface Board,
Heat Sink/Fan/Clip Assembly)
PR-22 __________________________________ 23 Pin Receptacles with
Throwaway Carrier
PB-22 ________________________________ Small Pry Bar (To Remove
Throwaway Carrier/Driver
From Pin Receptacles)
OSC-483H _______ Analog Speed Control Board for IM483H Driver
OSC-805H _______ Analog Speed Control Board for IM805H Driver
IM483H/IM805H
Pin Assignments and Functions
MECHANICAL SPECIFICATIONS BLOCK DIAGRAM
Dimensions in Inches (mm)
DEVELOPER’S KIT/INTERFACE BOARD
The Developer’s Kit provides all of the tools needed for rapid
prototyping and product evaluation of the IM483H/IM805H Hybrid
drivers. Included in the Kit are a driver, an interface board and its
schematic, and an HFC-22 assembly. The INT-483H/INT-805H inter-
face board features an on-board +5V supply, additional fault protection,
opto isolation for logic inputs,
and removable screw terminals
for easy prototyping. The
interface board
schematic
provides a
useful guide for
PC board layout
when complet-
ing a system
design using
the IM483H/
IM805H Hy-
brid. The HFC-
22 Heat Sink/
Fan/Clip as-
sembly is
designed
specifically for
use with the
IM483H/
IM805H and
provides a
unique, com-
pact cooling
solution.
INT-483H/INT-805H
Pin Assignments and Descriptions
MINIMUM CONNECTIONS PR-22 RECEPTACLE CARRIER
Dimensions in Inches (mm)
NOTE: Low impedance electrolytic capacitors MUST
be placed between +V and the phase grounds for each
phase (Pins P2: 2 & 8). In addition, a 68mF electro-
lytic capacitor MUST be placed between the +5 VDC
output of the +5 volt supply and ground. Capacitors
should be placed as close as possible to the driver.
Disposable plastic frame
holds 23 receptacles
in place for wave
or hand solder,
then simply pry
the plastic
frame free and
throwaway.
NOTE: Mounting
screws MUST be
used to secure Hybrid
when using Receptacle
Carrier.
