CIRCUIT TECHNOLOGY
www.aeroflex.com
eroflex Circuit Technology – Motor Driver Modules For The Future © SCD5026 REV A 8/21/98
Features
a73 V Supply 28V to 40V
a73 10 Amps Continuous Current (Up to 85°C)
a73 Package Size 1.7" x 1.3" x 0.275"
a73 4 Quadrant Control
a73 3 Phase Commutational Logic
a73 ±15VDC Regulators for External & Internal Use
a73 Military Processing Available
a73 MIL-PRF-38534 Compliant Circuits Available
a73 Full Military (-55°C to +125°C) Temperature Range
General Description
The ACT5026 combines a high power MOSFET 3 phase H-bridge output stage with all of the control circuitry
required to form a closed loop motor controller. The input command voltage linearly controls the motor
current with a scale-factor of 2 Amps per volt and a small-signal bandwidth of 2KHz. Input command
polarity determines Motor direction. Only one supply is necessary due to the internal regulators and
converter which provide ±15Volts for internal as well as external use.
The circuitry includes:
• Fully Differential Input Amplifier
• A Pulse Width Modulator Internally clocked at 16.7KHz (Has external Sync pin)
• ± 15 Volt regulated outputs derived from main supply
• Internal Current Sense Resistor
• External Loop Compensation pins to tailor to specific motors
• Current Monitor Output with Scale Factor of 1.67 Volts/Amp
V Supply Hall
Brushless
Motor
Inputs
+15V
-15V
≤ 70mA
≤ 20mA
V RTN
+15V
Reg
-15V
Reg
DC/DC
Conv
FW
Rect
Current
Sense
Current
Monitor
Current
CommandInputs
External
Loop
Comp
FW
Rect
16.7 KHz
Clock
(Optional)
SYNC
Cktry OSC
PWM
Logic
3Ø
H-Bridge
MOSFET
BLOCK DIAGRAM
Direction Internal use
Internal use
ACT5026 10 AMP 3-PHASE
BRUSHLESS DC MOTOR CONTROLLER
PWM
Input
Preliminary
+
-