Freescale Semiconductor 33395 User manual

ANALOG ICs
33395 EVALUATION
MOTOR BOARD
DESIGNER REFERENCE
MANUAL
MC33395RM
Rev. 2
05/2003
Communicate
Control
Protect
Power
EMBEDDED MOTION CONTROL

DRM33395 Designer Reference Manual 33395EvaluationMotorBoard

33395 Evaluation Motor Board DRM33395 Designer Reference Manual
List of Sections 1
33395 Evaluation Motor Board
List of Sections
Section 1. Introduction and Setup .................................... 9
Section 2. Operational Description ................................. 15
Section 3. Pin Descriptions..............................................17
Section 4. Schematics and Parts List ............................. 25
Section 5. Design Considerations .................................. 37

DRM33395 Designer Reference Manual 33395 Evaluation Motor Board
2 List of Sections
List of Sections

33395 Evaluation Motor Board DRM33395 Designer Reference Manual
Table of Contents 3
33395 Evaluation Motor Board
Table of Contents
Section 1. Introduction and Setup
1.1 Contents .....................................................................................9
1.2 SMOS EVM Motor Board Introduction........................................9
1.3 About This Manual......................................................................9
1.4 Warnings ..................................................................................12
1.5 Setup Guide..............................................................................13
Section 2. Operational Description
2.1 Contents ...................................................................................15
2.2 Introduction...............................................................................15
2.3 Electrical Characteristics ..........................................................16
Section 3. Pin Descriptions
3.1 Contents ...................................................................................17
3.2 Introduction ...............................................................................17
3.3 Signal Descriptions...................................................................19
3.3.1 Power Connectors J3 and JP4............................................19
3.3.2 40-Pin Ribbon Connector J1 ...............................................19
3.3.3 Output Connectors: J2, J4, FASTONS (J5, J7, J8)............. 22
3.3.4 Jumpers and Switch/Push Button: M0, M1, PWM, SW1.....22
3.3.5 Test Points ..........................................................................24

DRM33395 Designer Reference Manual 33395 Evaluation Motor Board
4 Table of Contents
Table of Contents
Section 4. Schematics and Parts List
4.1 Contents ...................................................................................25
4.2 Overview...................................................................................25
4.3 Schematics ...............................................................................25
4.4 Parts List...................................................................................32
Section 5. Design Considerations
5.1 Contents ...................................................................................37
5.2 Overview...................................................................................37
5.3 3-Phase H-Bridge .....................................................................37
5.4 Bus Voltage and Current Feedback Signals.............................38
5.5 Back-EMF Signals ....................................................................40
5.6 Brake Control............................................................................41

33395 Evaluation Motor Board DRM33395 Designer Reference Manual
List of Figures 5
33395 Evaluation Motor Board
List of Figures
Figure Title Page
1-1 System Configurations..............................................................10
1-2 SMOS EVM Motor Board ver. 140A01 .....................................11
1-3 SMOS EVM Motor Board Setup ...............................................14
3-1 40-Pin Input Connector J1 ........................................................18
4-1 SMOS EVM Motor Board ver. 140A01 Overview ....................26
4-1a SMOS EVM Motor Board ver. 140A02 Overview ....................27
4-2 3-Phase H-Bridge with Gate Driver ..........................................28
4-3 Current Feedback Circuits ........................................................29
4-4 Back-EMF Signals .................................................................... 30
4-5 Brake Control............................................................................31
4-6 Brushless DC Motor Connections - Schematic View................31
5-1 Phase Current and DC Bus Voltage Sensing ...........................39
5-2 Reconstructed Bus Current ......................................................40
5-3 Phase C Back-EMF Feedback .................................................40

DRM33395 Designer Reference Manual 33395 Evaluation Motor Board
6 List of Figures
List of Figures

33395 Evaluation Motor Board DRM33395 Designer Reference Manual
List of Tables 7
33395 Evaluation Motor Board
List of Tables
Table Title Page
2-1 Electrical Characteristics ..........................................................16
3-1 Connector J1 Signal Descriptions ............................................19
3-2 Connectors J2 and J4 Signal Descriptions...............................22
3-3 Driver Jumper Groups for Operating Mode ..............................22
3-4 Gate Driver PWM Signal Selection ...........................................23
3-5 Test Points ...............................................................................24
4-1 Parts List...................................................................................32

DRM33395 Designer Reference Manual 33395 Evaluation Motor Board
8 List of Tables
List of Tables

33395 Evaluation Motor Board DRM33395 Designer Reference Manual
Introduction and Setup 9
33395 Evaluation Motor Board
Section 1. Introduction and Setup
1.1 Contents
1.2 SMOS EVM Motor Board Introduction........................................9
1.3 About This Manual......................................................................9
1.4 Warnings ..................................................................................12
1.5 Setup Guide..............................................................................13
1.2 SMOS EVM Motor Board Introduction
Freescale SMARTMOSTM 33395 evaluation motor board
(SMOS EVM motor board) is a 12-volt, 8-amp power stage that is an
integral part of Freescale embedded motion control series of
development tools. It is also supplied as a kit. In combination with one of
the embedded motion-control series control or evaluation boards, it
provides a ready-made development platform for brushless dc motors.
The motor can be controlled using Hall sensors, an optical encoder or
sensorless techniques. An illustration of system configurations is shown
in Figure 1-1. Figure 1-2 depicts the board layout.
1.3 About This Manual
Key items can be found in the following locations in this manual:
• Setup instructions are found in chapter 1.5.
• Schematics are found in chapter 4.3.
• Pin assignments are shown in Figure 3-1, and a pin-by-pin
description is contained in chapter 3.3.
• For those interested in the reference design aspects of the board’s
circuitry, a description is provided in Section 5.

DRM33395 Designer Reference Manual 33395 Evaluation Motor Board
10 Introduction and Setup
Introduction and Setup
Figure 1-1 System Configurations
HC08
CONTROLLER
BOARD
SMOS EVM
MOTOR BOARD
MOTOR
WORKSTATION
MMDS08
DSP
EVM
BOARD
SMOS EVM
MOTOR BOARD
MOTOR
WORKSTATION
b) 56800(E) DSPa) MC68HC(9)08MR MICROCONTROLLER
OPTIONAL FEEDBACKOPTIONAL FEEDBACK

Introduction and Setup
About This Manual
33395 Evaluation Motor Board DRM33395 Designer Reference Manual
Introduction and Setup 11
Figure 1-2 SMOS EVM Motor Board ver. 140A01
MOTOR CONNECTORS
POWER SUPPLY CONNECTORS
TRIMMER
JUMPERS AND SWITCH
UNI-3
CONNECTOR

DRM33395 Designer Reference Manual 33395 Evaluation Motor Board
12 Introduction and Setup
Introduction and Setup
1.4 Warnings
The SMOS EVM motor board kit includes a rotating machine and power
transistors. Both can reach temperatures hot enough to cause burns! To
facilitate safe operation, 12-volt input power should come from a dc
laboratory power supply that is current limited to no more than 10 amps.
The user should be aware that:
• Before moving scope probes, making connections, etc., it is
generally advisable to power down the 12-volt supply.
• Standalone operation of the board should be allowed only with use
of an insulative pad or standoffs as shown in Figure 1-3.
• Wearing safety glasses, avoiding neckties and jewelry, using
shields, and operation by personnel trained in power electronics
lab techniques are also advisable.

Introduction and Setup
Setup Guide
33395 Evaluation Motor Board DRM33395 Designer Reference Manual
Introduction and Setup 13
1.5 Setup Guide
Setup and connections for the SMOS EVM motor board are
straightforward. The SMOS EVM motor board connects to a Freescale
embedded motion control series control board via a 40-pin ribbon cable.
The motor’s power leads plug into one of the output connectors J2 or J4
or FASTON type (J5 J7 J8). Figure 1-3 depicts a completed setup with
control board or module.
Follow these steps to set up the board:
1. Mount 4 standoffs to the SMOS EVM motor board at the locations
indicated in Figure 1-3. Step 1 and step 3 are optional when making
connections to DSP control boards such as the DSP56F8xxEVM that
can be placed flat on a bench next to the SMOS EVM motor board.
2. Plug one end of the 40-pin ribbon cable that is supplied with Freescale
embedded motion control series control boards into input connector J1,
located on the right-hand side of the motor board, considering its ‘default
front view’ position as in Figure 1-2. The other end of this cable links to
the control board’s 40-pin output connector.
3. Mount the control board on top of the standoffs with screws and
washers. This step is optional with DSP control boards.
4. Connect a 12-Vdc power supply either to connector J3 or power jack
JP4, labeled “Power 12V”. Either one, but not both, can be used. These
connectors are located on the front left-hand corner of the board. The
12-volt power supply should be rated to match the motor current.
5. Apply power to the SMOS EVM motor board. The green power-on LED
lights when the voltage supply is present. Note that the SMOS EVM
motor board powers the control board as well.
CAUTION: Since the control board is powered by the SMOS EVM motor board,
it is imperative that only one power supply is used!
6. Temperature, under-voltage or over-voltage faults, or externally sensed
bus current overflow disables the gate driver. Board reset is needed.
Either switch the power supply off and on or provide a ‘soft reset’. To
provide the soft reset on the 140A01 board version, toggle the SW1
switch from position 3 to 2; on the 140A02 version, press the RESET
button. Refer to chapter 3.3.4 to verify the jumper positions.
NOTE: Check if the trimmer tagged in Figure 1-2 is set to <2.45V (between
bottom trimmer pin-2, R131 label, and GNDA) which thresholds the dc
bus current to 10 amps. The closer its value is set to 1.65V, the smaller
the bridge current is that can flow.

DRM33395 Designer Reference Manual 33395 Evaluation Motor Board
14 Introduction and Setup
Introduction and Setup
Figure 1-3 SMOS EVM Motor Board Setup
MOTOR
56800(E)
SMOS EVM 40-PIN
RIBBON CABLE
STANDOFF
12-VOLT
MOTOR SUPPLY
STANDOFF
MOTOR BOARD
EVALUATION MODULE
OR
HC08 CONTROL BOARD
STANDOFFS
OR
HCS12 CONTROL BOARD
OR
MPC EVALUATION MODULE

33395 Evaluation Motor Board DRM33395 Designer Reference Manual
Operational Description 15
33395 Evaluation Motor Board
Section 2. Operational Description
2.1 Contents
2.2 Introduction ...............................................................................15
2.3 Electrical Characteristics ..........................................................16
2.2 Introduction
Freescale embedded motion control series SMOS EVM motor board is
a 12-volt, 8-amp, surface-mount power stage with an analog SMOS
driver. In combination with one of the embedded motion control series
control boards, it provides a development platform that allows algorithms
to be written and tested without the need to design and build a power
stage. It supports algorithms that use Hall sensors, encoder feedback,
and Back-EMF (electromotive force) signals for sensorless control.
The SMOS EVM motor board has an over-current protection that is
independent of the control board, yet some care in its setup and use is
required for board or motor protection. Current-measuring circuitry is set
up for 8 amps full scale, according to trimmer position. A 25°C ambient
temperature operation with output current up to 10 amps of continuous
RMS value is within the board’s thermal limits. Note that there is no
thermal protection provided on the board.
Input connections are made via a 40-pin ribbon cable connector J1. Pin
assignments for the input connector are shown in Figure 3-1. Power
connections to the motor are made on one of the output connectors J2
or J4 or FASTON type (J5 J7 J8). Phase A (J8), phase B (J7), and phase
C (J5) are labeled on the board, the phase pin order for all three
connector types is identical. Power requirements are met by a single
external 12-Vdc power supply. Two connectors, labeled J3 and JP4, are

DRM33395 Designer Reference Manual 33395 Evaluation Motor Board
16 Operational Description
Operational Description
provided for the 12-volt power supply; they are located on the front edge
of the board. Power is supplied to one or the other, but not both.
A summary of the information needed to use the SMOS EVM motor
board follows. For design information, see Section 5.
2.3 Electrical Characteristics
The electrical characteristics in Table 2-1 apply to operation at 25°C and
a 12-Vdc power supply voltage.
Table 2-1 Electrical Characteristics
Characteristic Symbol Min Typ Max Units
Power Supply Voltage Vdc 10.2 12 16 V
Quiescent Current ICC —70—mA
High State Logic 1 Input Voltage VIH 2.4 3.3 or 5 7 V
Low State Logic 0 Input Voltage VIL — < 0.4 0.8 V
Input Resistance RIn —10—k!
Analog Output Range VOut 0—3.3V
Phase Current Sense Voltage ISense —172—mV/A
Bus Voltage Sense Voltage VBus —206—mV/V
Power MOSFET On Resistance RDS(On) —1016m!
RMS Output Current IM——10A
Total Power Dissipation Pdiss ——18W

33395 Evaluation Motor Board DRM33395 Designer Reference Manual
Pin Descriptions 17
33395 Evaluation Motor Board
Section 3. Pin Descriptions
3.1 Contents
3.2 Introduction...............................................................................17
3.3 Signal Descriptions...................................................................19
3.3.1 Power Connectors J3 and JP4............................................19
3.3.2 40-Pin Ribbon Connector J1 ...............................................19
3.3.3 Output Connectors: J2, J4, FASTONS (J5, J7, J8).............22
3.3.4 Jumpers and Switch/Push Button: M0, M1, PWM, SW1.....22
3.3.5 Test Points ..........................................................................24
3.2 Introduction
Inputs and outputs are located on six board connectors depicted in
Figure 1-2:
• There are three motor connectors conducting identical output
signals, however only one motor can be connected at run time to
one of these connectors.
• There are two power supply connectors which introduce identical
input signals, however only one power supply can be plugged in
at run time to one of these connectors.
• One connector (UNI-3) is associated with the controller board.
In addition, many test points are located on the SMOS EVM motor board.
Pin descriptions for each of these connectors and the test points are
identified in the following information. Pin assignments for the input and

DRM33395 Designer Reference Manual 33395 Evaluation Motor Board
18 Pin Descriptions
Pin Descriptions
output connectors are shown in Figure 3-1 with their descriptions in
Table 3-1 through Table 3-5.
Figure 3-1 40-Pin Input Connector J1
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BEMF_sense_C
BEMF_sense_B
BEMF_sense_A
Shielding_A
Zero_cross_C
Zero_cross_B
Zero_cross_A
PWM_ctrl
Identification
Brake_control
Shielding_A
I_sense_C
I_sense_B
I_sense_A
I_reconst_DCB
V_sense_DCB
+12V_A
Shielding_A
Shielding_A
+3.3V_A
+5V_D
+5V_D
GND
GND
PWM_CB
Shielding_D
PWM_CT
Shielding_D
PWM_BB
Shielding_D
PWM_BT
Shielding_D
PWM_AB
Shielding_D
PWM_AT
SCHEMATIC VIEW
J1
CON/40
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Shielding_D
Shielding_D
Shielding_D
Shielding_D
Shielding_D
GND
+5V_D
+3.3V_A
GNDA
I_reconst_DCB
I_sense_B
Shielding_A
Identification
Zero_cross_A
Zero_cross_C
BEMF_sense_A
BEMF_sense_C
PWM_AT
PWM_AB
PWM_BT
PWM_BB
PWM_CT
PWM_CB
GND
+5V_D
GNDA
+12V
V_sense_DCB
I_sense_A
I_sense_C
Brake_control
PWM_ctrl
Zero_cross_B
Shielding_A
BEMF_sense_B
PHYSICAL VIEW