DB64R APEX PRECISION POWER, DB64R Datasheet

3 Phase Brushless DC Motor Driver Demo Board

DB64R

Manufacturer Part Number

DB64R

Description

3 Phase Brushless DC Motor Driver Demo Board

Manufacturer

APEX PRECISION POWER

Datasheet

1.DB64R.pdf (6 pages)

Specifications of DB64R

Silicon Manufacturer

Cirrus Logic

Silicon Core Number

SA306

Kit Application Type

Power Management - Motor Control

Application Sub Type

DC Brushless Motor

Kit Contents

Board Docs

Current page: 1 of 6
Download datasheet (967Kb)

INTRODUCTION

The DB64R is designed to demonstrate the capabilities of the SA306 3 phase brushless DC (BLDC) motor driver

IC. This fully assembled demonstration allows the user to directly control the speed and direction of the motor. An

onboard controller decodes HALL Effect sensor inputs for commutation in either direction and provides four quad-

rant PWM signals to control the power outputs of the SA306. LEDs provide feedback for motor control status and

fault indications. Provisions on the DB64R allow the user to bypass the onboard control circuit and directly interface

with the SA306 brushless motor driver.

The DB64R demonstrates proper layout techniques for the

SA306 high current switching amplifier. The economical con-

struction uses only a two-sided PCB and allows the SA306

to deliver peak currents of over 1kW.

THERMAL CONSIDERATIONS

The SA306 is available in a surface mount package which

can deliver peak power of over 1kW. This presents an obvi-

ous and significant thermal challenge. The DB64R offers a

compact design which can deliver 17A peak current by using

a patent pending mounting technique. Mounting the SA306

in an inverted fashion as shown in Figure 1 reduces the pro-

file height of the assembly and provides a direct interface

between the thermal tab of the PowerQuad package (pack-

age outline drawing HQ) and the small HS33 heatsink. The

DB64R assembly can dissipate 7-9W in still air at 25ºC ambi-

ent temperature, depending on the orientation of the heatsink

fins. To use the DB64R in higher power applications, use a

fan or mount a heatsink with larger thermal mass. Although

the SA306 is rated for operation from -25 to +85ºC, the other

components on the DB64R are limited to 0 to 70ºC ambient

temperature.

CIRCUIT OPERATION

The DB64R control circuit receives power via two terminal

block connections. The Vs connection supplies power to

drive the motor and must be above the under-voltage lock-

out threshold of the SA306, approximately 8.3V. The control

circuit requires 12V for proper operation a regulator on the

DB64R provides the 5V logic supply for the SA306. There

are no special considerations for sequencing the two sup-

plies.

DB64RU

http://www.cirrus.com

Demonstration Board for the SA306-IHZ

P r o d u c t I n n o v a t i o n F r o m

Figure – Mounting Technique

PATENT PENDINg

APEX − DB64RUREVA

DB64R

FEB 2009

Related parts for DB64R

DB64R Summary of contents

Page 1

... Demonstration Board for the SA306-IHZ INTRODUCTION The DB64R is designed to demonstrate the capabilities of the SA306 3 phase brushless DC (BLDC) motor driver IC. This fully assembled demonstration allows the user to directly control the speed and direction of the motor. An onboard controller decodes HALL Effect sensor inputs for commutation in either direction and provides four quad- rant PWM signals to control the power outputs of the SA306 ...

Page 2

... SA306. Push-button switches 1 and 2 trigger latches (U4) for direction and enable control, respectively. Diodes D7 & D8 and resistors R24, 25, 29 & 30 provide a means of bypassing the DB64R control circuit. The 5V regulator, U3, provides 5V to the SA306, the latches and the status LEDs. ...

Page 3

... Connector J4 is connected directly to the PWM input pins of the SA306. This connector may be used to monitor the signals or to bypass the control IC on the DB64R. The enable function is not controlled via these pins, although pulling all six input pins low provides the same effect. The Enable pushbutton and the connection via J5 are also effective as previously described ...

Page 4

... Figure 4 shows the top and bottom layouts of the DB64R. Gerber files for the circuit board are available upon re- quest. Figure 4 – PCB Layout (not to scale) ...

Page 5

... On Shore Tech, OSTTA034163 Heatsink compound N/A SA306-IHZ Cirrus Logic, SA306-IHZ UCC3626 Texas Instruments, UCC3626PW LM78L05 National Semiconductor, LM78L05ACMX/NOPB 74AC74 Texas Instruments, SN74AC74PW Heatsink Cirrus Logic, HS33 PCB, 1.75” x 3.75” Cirrus Logic, EVAL67R Screw, #4-40 x ¼” N/A Solder Tin/Silver 96/4 DB64R ...

Page 6

... Apply voltage to Vs based on rated motor voltage, normally 12-48V. 4. Press ENABLE switch 3. LED 4 will light and motor should start. ORDERINg INFORMATION DB64R Demonstration Board includes one populated EVAL67R PCB and one SA306-IHZ sample CONTACTINg CIRRUS LOgIC SUPPORT For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America. ...

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