ACT ACT5026 Datasheet

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ACT5026 10 AMP 3-PHASE

BRUSHLESS DC MOTOR CONTROLLER

Features

■ V Supply 28V to 40V

■ 10 Amps Continuous Current (Up to 85

■ Package Size 1.7" x 1.3" x 0.275"

■ 4 Quadrant Control

■ 3 Phase Commutational Logic

■ ±15VDC Regulators for External & Internal Use

■ Military Processing Available

■ MIL-PRF-38534 Compliant Circuits Available

■ Full Military (-55°C to +125°C) Temperature Range

Preliminary

°

C)

CIRCUIT TECHNOLOGY

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

16.7 KHz
Clock

(Optional)

PWM
Input

External

Loop

Comp

Current

Command

Inputs

Current
Monitor

+

-

SYNC

Cktry

OSC

FW

Rect

BLOCK DIAGRAM

PWM

Logic

Direction

FW

Rect

3Ø
MOSFET
H-Bridge

Current

Sense

+15V

Reg

DC/DC

Conv

-15V
Reg

V Supply

Hall

Inputs

Brushless

Motor

Internal use

+15V
≤ 70mA

Internal use

-15V

≤ 20mA

V RTN

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Aeroflex Circuit Technology SCD5026 REV A 8/21/98 Plainview NY [phone]

Z

CIRCUIT TECHNOLOGY

Package Outline Drawing

1.300

.280

TYP

.287

±.010

2.200

1.950

1.700

.250

.600

±.020

±.010

Ø.125

(2 Holes)

ACT 5026

88379

1.050

MADE IN U.S.A.

XXXX

.125

1.125

TYP

(9 Spaces at .125)

Pinout Descriptions

PIN Number FUNCTION

1 +15V OUTPUT
2 EXTERNAL CAP +
3 EXTERNAL CAP ­4 -15V OUTPUT
8 COMMUTATOR INPUT A
7 COMMUTATOR INPUT B

6 COMMUTATOR INPUT C
13 CURRENT MONITOR OUT
15 CURRENT COMMAND (+)
14 CURRENT COMMAND RETURN (-)
17 MOTOR DRIVE OUTPUT A
18 MOTOR DRIVE OUTPUT B
19 MOTOR DRIVE OUTPUT C
20 V SUPPLY
10 V RETURN SIGNAL
16 V RETURN PWR

5 CLOCK
12 LOOP COMPENSATION, ERROR AMP OUTPUT

9 LOOP COMPENSATION, ERROR AMP SUMMING NODE
11 PWM INPUT

Ø.040

TYP

.275
MAX

.045

1.550
±.020

.155

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35 South Service Road
Plainview New York 11830

Specifications subject to change without notice

2

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