OMNIREL OM506 Datasheet

2.1 - 5

2.1

4 11 R1 Supersedes 3 08 R0

Closed Loop Speed Controller For 3 Phase Brushless DC Motor

DC BRUSHLESS MOTOR CONTROLLER

FEATURES

DESCRIPTION

The OMC506 is an integrated, high density, three phase Brushless DC (BLDC) motor, speed controller housed in a MP-3T package. The OMC506 contains the power, driver and control electronics to adjust timing functions and speed control loop parameters to optimize the controller for each application. The electronics contained in the OMC506 are assembled using mixed process technologies: surface mount components on a printed circuit board and chip & wire on an Insulated Metal Substrate. This combination offers small size, excellent thermal characteristics and electrically isolated heat sink.

ABSOLUTE MAXIMUM RATINGS

Motor Supply Voltage, VM………………………………………………………………32 Vdc

Peak Motor Supply Voltage, VMpk ……………………………………….….…......……48 V

Average Phase Output Current, IO ………………………………………………..…..……10 A Pulsed Output Current (<1% Duty Cycle), I

…………………………….…..…………30 A

Oscillator Input Current (Source or Sink), I

OSC

………………………………………30 mA

Reference Output Voltage V

REF(IREF

= 1.0 mA) ……………………………………..6.5 V Digital Inputs (Fwd/Enable/Brake/SA/SB/SC) …………………………………….……..6.5 V Reference Ouput Current, I REF (V REF=6.2 V) ………………………………………10 mA Speed Control Input Voltage, V

SPEED

………………………………..……..…-0.3 to V REF V Tachometer Input Voltage, V

TACH

……………………………………………..-0.3 to V REF V

Temperature Control Input Voltage, V

CNTL

… ……………………………………………..6.2 V

Regulator Output Current, (V

REG

+15V)………………………………………………100 mA

Current Sense Input Voltage, V

………………………………………………...…-0.3 to 5 V

Operating Temperature Range, T

…………………….…………………...…-25 to +85oC

OMC506

• 10A Average Phase Output Current

• Over Temperature Protection

• Compensation Circuitry Adjustable To Motor Parameters

• Speed Controlled by 0 To 5V Linear Input Signal

• Forward Or Reverse Direction

• Isolated, Low Profile Package

2.1 - 6

OMC506

2.1

MP3 PACKAGE APPLICATION

ELECTRICAL CHARACTERISTICS(T

= 25°C unless otherwise specified)

Characteristic Symbol Test Conditions Min. Typ. Max. Unit

REFERENCE Reference Ouput Voltage V REF I REF = 1mA 5.9 6.24 6.5 V Reference Load Current I REF - 5 8 mA

OSCILLATOR Oscillator Frequency F OSC 22 25 28 kHz

Sawtooth Peak Voltage V OSCpk ROSC = 4.7k, COSC = 0.01 mF - 4.1 4.5 V Sawtooth Valley Voltage V oscva 1.2 1.5 - V DIGITAL INPUTS

High Input Threshold Voltage V ih 3 2.2 - V Low Input threshold Voltage V il - 1.7 0.8 V

CURRENT SENSE Threshold Voltage V th 85 101 115 mV Input Common ModeVolt Range V icr - 3 - V Input Bias Current I ib - -0.9 -5 mA

VOLTAGE REGULATOR Ouput Voltage V reg 14.0 14.5 15.0 V Load Regulation I reg 10 mA < Io<100mA 0.1 0.3 %

THERMAL Output Trip Voltage V OUT T > T trip’ RL =100K 13 13.31 14.79 V Output Normal Voltage V ON T > T trip’ RL =100K - 0.13 0.4 V Trip Temperature T trip T trip 137 145 150 C Reset Temperature T reset 129 137 142 C Internal Current Sense Resistor R S 9.5 10 10.5 m* Jun to Case MOSFET Resistance R thjc - - 1.6 oC/W oC/W

A new mixed signal module fully integrates power, control functions, and drive circuitry into a single 2" x 4" x 0.48" package. The module provides closed loop speed control of three phase, brushless DC (BLDC) motors used in a variety of system applications . The OMC506 has been designed with flexibility in mind. Timing functions and loop parameters can be adjusted to optimize the OMC506 to each customer’s application. In addition, the OMC506 has been designed into a MP-3T package. This package uses an insulated metal substrate, thereby, isolating the module's electronics from chassis while providing the necessary thermal interface for proper performance. The OMC506 offers a high efficiency, flexible, compact, motion control system in an industry standard footprint.

2.1 - 7

OMC506

2.1

BLOCK DIAGRAM

RT/CT

MOTOR

CONTROL

OUT

6.2 V

REF

TACH IN

SPEED

+15 V

FWD/REV

OSC

C.S.+

C.S.-

BRAKE

ENABLE

REGULATOR

THREE PHASE

REFRESH

SENSE

RTN

SENSE

C OUT

B OUT

A OUT

MOT

POWER STAGE

DRIVER

TACHOMETER

COMPENSATION

LOOP SHAPING

+15 V

COMMUTATION

AND

CONTROL

OUT

OVER TEMP

CKTRY

Controller

The OMC506 is based on the Motorola MC33035 Brushless Motor Control I.C. This controller is used in concert with the Motorola MC33039 Closed Loop Brushless Motor Adapter I.C. to provide direct duty cycle control of the motor speed. The OMC506 provides two quadrant speed control via an analog 0 to 5V signal applied to the V

speed

(pin 22) input. The OMC506 is selectable for 60/120 degree hall sensor

spacing. The commutation truth table for the OMC506 is shown below.

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