STMicroelectronics STEVAL-PCC009V2 User Manual

STMicroelectronics EVLPOWERSTEP01 is an evaluation board that is based on the powerSTEP01 system-in-package implementing a complete stepper motor driver for high power applications. It is designed to operate with a supply voltage ranging from 10.5 V to 85 V with a maximum current of 10 Ar.m.s. In combination with the STEVAL-PCC009V2 demonstration board and the SPINFamily evaluation tool, the board provides a complete and easy-to-use evaluation environment allowing the user to investigate all the features of the powerSTEP.

PDF

เอกสาร

โฆษณา

UM1829

User manual

EVLPOWERSTEP01: system-in-package integrating microstepping controller and 10 A power MOSFETs

Introduction

The EVLPOWERSTEP01 is a demonstration board based on the powerSTEP01 system-inpackage implementing a complete stepper motor driver for high power applications. It is designed to operate with a supply voltage ranging from 10.5 V to 85 V with a maximum current of 10 A r.m.s.

In combination with the STEVAL-PCC009V2 demonstration board and the SPINFamily evaluation tool, the board provides a complete and easy to use evaluation environment allowing the user to investigate all the features of the powerSTEP.

Supporting the daisy chain configuration the board is suitable for the evaluation of the multi motor applications.

October 2014 DocID027011 Rev 1 1/20 www.st.com

Contents

UM1829

Board description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Evaluation environment setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Device configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.1

Voltage mode driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

3.2

Advanced current control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.3

Gate drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.4

Overcurrent and stall detection thresholds . . . . . . . . . . . . . . . . . . . . . . . . 13

3.5

Speed profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Sensing resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

How to change the supply configuration of the board . . . . . . . . . . . . 16

Daisy chaining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2/20 DocID027011 Rev 1

UM1829 Board description

Table 1. Electrical specifications

Parameter

Supply voltage (VS)

Maximum output current (each phase)

Gate drivers supply voltage (VCC)

Logic supply voltage

Logic interface supply voltage

Low logic level input

High logic level input

Operating ambient temperature

1. All logic inputs are 5 V tolerant.

Value

10.5 V to 85 V

10 A r.m.s.

7.5 V to 15 V

3.3 V

3.3 V or 5 V

0 V

VDD

(1)

0 °C to +85 °C

([WHUQDORVFLOODWRU

FRQQHFWRU

26&,1DQG26&287

%ULGJH%

VKXQWUHVLVWRUV

0RWRUSKDVH%

FRQQHFWRU

*URXQGWHVWSRLQW

Figure 1. Jumpers and connectors location

6ODYH

63,FRQQHFWRU

([WHUQDOVZLWFK

FRQQHFWRU

6:LQSXW

63,WHUPLQDWLRQ

MXPSHU

%86</('

)/$*/('

67&.

LQSXW

0DVWHU

63,FRQQHFWRU

67%<SXOOXS

9''

WHVWSRLQW

MXPSHU

95(*

WHVWSRLQW

SRZHU67(3

6XSSO\PDQDJHPHQW

MXPSHUV

6XSSO\PDQDJHPHQWFRQQHFWRU

96965(*9&&5(*

DQG*1'

9&&WHVWSRLQW

*URXQGWHVWSRLQW

3RZHUVXSSO\FRQQHFWRU

0RWRUSKDVH$

FRQQHFWRU

%ULGJH$

VKXQWUHVLVWRUV

0RWRUVXSSO\YROWDJH

FRPSHQVDWLRQWULPPHU

$'&,1LQSXW

DocID027011 Rev 1 3/20

Board description

Name

JP5

JP6

JP7

JP8

JP9

JP10

JP3

JP4

Type

Power supply

Power output

Power supply

SPI

Jumper

Table 2. Jumpers and connectors description

Function

Main supply voltage

Power bridge A outputs

Power bridge B outputs

Integrated voltage regulator inputs

Master SPI connector

Slave SPI connector

VS to VSREG jumper

VSREG to VCC jumper

VCC to VCCREG jumper

VCCREG to VREG jumper

VREG to VDD jumper

VDD to 3.3 V from SPI connector jumper

Daisy chain termination jumper

STBY to VS pull-up jumper

UM1829

Pin number

Type

Open drain output

Ground

Supply

Digital output

Digital input

Table 3. Master SPI connector pinout (J5)

Function powerSTEP01 BUSY output powerSTEP01 FLAG output

Ground

EXT_VDD (can be used as external logic power supply)

SPI “Master In Slave Out” signal (connected to powerSTEP01 SDO output through daisy chain termination jumper JP9)

SPI “Serial Clock” signal (connected to powerSTEP01 CK input)

SPI “Master Out Slave In” signal (connected to powerSTEP01 SDI input)

SPI “Slave Select” signal (connected to powerSTEP01 CS input) powerSTEP01 step-clock input powerSTEP01 standby/reset input

4/20 DocID027011 Rev 1

UM1829 Board description

Pin number

Type

Open drain output

Ground

Supply

Digital output

Digital input

Table 4. Slave SPI connector pinout (J7)

Function powerSTEP01 BUSY output powerSTEP01 FLAG output

Ground

EXT_VDD (can be used as external logic power supply)

SPI “Master In Slave Out” signal (connected to pin 5 of J5)

SPI “Serial Clock” signal (connected to powerSTEP01 CK input)

SPI “Master Out Slave In” signal (connected to powerSTEP01 SDO output)

SPI “Slave Select” signal (connected to powerSTEP01 CS input) powerSTEP01 step-clock input powerSTEP01 standby/reset input

DocID027011 Rev 1 5/20

Board description

Figure 2. Schematic page 1 of 2

UM1829

& Q)

9%227

6(16(%B3

6(16(%B6

6(16($B3

6(16($B6

*1'

6/20 DocID027011 Rev 1

UM1829

Figure 3. Schematic page 2 of 2

Board description

DocID027011 Rev 1 7/20

Board description UM1829

Table 5. Bill of material

Index Qty.

Reference

Value / generic part number

Package Manufacturer

Manufacturer's ordering code / orderable part number

C1, C8

C2, C3, C4,

C10

C11

C12

C13

C14A

C14

C15

DL1

470 nF/25 V

220 nF/100 V

47 nF/100 V

100 nF/100 V

100 nF/25 V

3.3 nF/6.3 V

22  F/6.3 V

100 nF/4 V

100 nF/6.3 V

220  F/100 V

10 nF/6.3 V

LED - amber

DL2

JP1, JP2, JP4,

JP6, JP8

LED - red

BAR43S

BZX585-B3V3

BZX585-B3V6

OPEN

JP3, JP5, JP7,

JP9, JP10

J1, J3, J4

CLOSED

MORSV-508-2P

J2, J8

N. M.

Pol. IDC male header vertical

10 poles (black)

N. M.

Pol. IDC male header vertical

10 poles (gray)

39 k  R1, R2

R3, R4, R5,

R6, R7, R8

R9, R10

0.1  /2 W

470 

CAPC-0603

CAPC-0805

CAPC-0603

CAPC-0805

CAPC-1206

CAPC-0603

CAPE-R16H21- P75

CAPES-R18H17

CAPC-0603

LEDC-0805

SOT23

SOD523

JP2SO

MORSV-508-2P

STRIP254P-M-2

CON-FLAT - 5 x 2- 180 M

STRIP254P-M-4

CON-FLAT - 5 x 2- 180 M

RESC-0603

RESC-2512

RESC-0603

STMicroelectronics BAR43SFILM

8/20 DocID027011 Rev 1

UM1829 Board description

Table 5. Bill of material (continued)

Index Qty.

Reference

Value / generic part number

Package Manufacturer

Manufacturer's ordering code / orderable part number

R11

R12, R14

R13

R15

100 k

50 k

10 k



/0.125 W

N. M.

 /0.125 W

RESC-0603

TRIMM- 100 x 50 x 110

- 64 W

TP1, TP2, VS,

VREG, VDD,

VCC, STCK

TP-RING-RED

TPTH-RING- 1 MM powerSTEP01

MLPQ85L

- 140 x 110 x 100 - 89 - ST

STMicroelectronics POWERSTEP01

DocID027011 Rev 1 9/20

Evaluation environment setup

2 Evaluation environment setup

UM1829

The evaluation environment is composed by:

 One or more EVLPOWERSTEP01.

 One STEVAL-PCC009V2 demonstration board.

 A USB cable.

 A stepper motor with a small mechanical load (unloaded stepper motors suffer of strong resonance issues).

 A power supply with an output voltage within the operative range of the demonstration board.

 A Windows ® 7 or Windows XP PC with a free USB port.

 The SPINFamily evaluation tool (the last version can be downloaded from the

STMicroelectronics

website).

In order to start using the evaluation environment the following steps are required:

Install the SPINFamily evaluation tool.

2. Start the SPINFamily evaluation tool (by default it is in Start menu > All programs >

STMicroelectronics > SPINFamily Evaluation Tool).

3. Select the proper device when requested by the application.

4. Plug the STEVAL-PCC009V2 demonstration board to a free USB port.

5. Wait a few seconds for board initialization.

6. Connect the SPI_IN connector (black) of the demonstration board to the 10-pin connector of the STEVAL-PCC009V2 board using the provided cable.

For connecting more devices to the same board, please consult the daisy chain connection paragraph (

Section 6 on page 18

7. Power-up the demonstration boards. The FLAG LED should turn on.

8. Click on the button with the USB symbol to connect the STEVAL-PCC009V2 board to the PC and initialize the evaluation environment.

The application automatically identifies the number of demonstration boards connected.

9. The evaluation environment is ready.

Before start working with the demonstration board, the device must be configured according to the indications described in

Section 3: Device configuration

Warning: important - the device configuration is mandatory. The default configuration is not operative.

10/20 DocID027011 Rev 1

UM1829 Device configuration

This section offers an overview of the basic configuration steps which are required for make the demonstration board operative. More details about the configuration of the gate driving circuitry and the control algorithms are available in the specific application notes.

Warning: important - the device configuration is mandatory. The default configuration is not operative.

Important - before changing the device configuration verify that the device is in high impedance status (power stage is disabled).

3.1 Voltage mode driving

When the device uses the voltage mode driving, the shunt resistors are not required. In this case it is recommended to remove the shunt resistors (R4 - R8) and short the sense pins to ground through the JP1 and JP2 jumpers.

The configuration parameters of the voltage mode driving can be obtained through the

BEMF compensation tool embedded into the SPINFamily software.

A wrong setup of these parameters could cause several issues, in particular:

 The phase current decreases with the speed and the motor will stall.

 The wrong voltage is applied to the motor and the system is very noisy.

 The phase current reaches the overcurrent limit.

The BEMF compensation form uses the application parameters as inputs in order to evaluate the proper device setup.

The required inputs are:

 Supply voltage.

 Target phase current (r.m.s. value) at different motion conditions (acceleration, deceleration, constant speed and holding).

 Target operating speed (maximum speed).

 Motor characteristics.

The motor characteristics are: electrical constant (Ke), phase inductance and resistance.

The inductance and the resistance of the phase are given in the motor datasheet. The Ke is rarely given in the specification and must be measured.

In the help section of the SPIN family software a step-by-step procedure is explained. The same procedure can also be found in the application note AN4144: “Voltage mode control operation and parameter optimization”.

Click on the “evaluate” button to get the suggested setup for the voltage mode driving. Then click on the “write” button to copy the data into the registers of the powerSTEP01.

DocID027011 Rev 1 11/20

Device configuration UM1829

The following configuration gives good results with most of motors:

 Minimum ON time = (2 x t

 Minimum OFF time = 21 µs.

+ t

BLANK

) + 1 µs.

 Max. fast decay = 10 µs.

 Max. fast decay at step change = 16 µs.

 Target switching time = 48 µs.

 Predictive current control disabled.

The impact of the timing parameters is explained in the application note AN4158: “Peak current control with automatic decay adjustment and predictive current control: basics and setup”.

The target phase current is set through the TVAL registers. The TVAL determinates the reference voltage (i.e.: the voltage drop on the sense resistors) corresponding to the peak of the current sine wave (microstepping operation):

Equation 1

I peak

= TVAL_X /R sense

= TVAL_X /0.033

The sensing resistors can be changed as described in Section 5 .

The charge supplied by the device at each commutation is equal to the gate current (I gate multiplied by the controlled current time (t cc charge (Q g

). This value must be greater of the total gate

)

) required to turn on the integrated MOSFETs. The gate current can be changed in order to speed up or slow down the commutation speed (i.e.: the slew rate of the power stage outputs); in this case the controlled current time should be changed accordingly.

The power MOSFETs integrated into the powerSTEP01 system-in-package has a total gate charge of 25 nC (typical) and the recommended configurations are listed in

Table 6 .

Table 6. Recommended gate driving configurations

Slew rate (VS = 48 V)

980 V/  s

790 V/  s

520 V/  s

400 V/  s

220 V/  s

114 V/  s

I gate

96 mA

64 mA

32 mA

24 mA

16 mA

8 mA t

375 ns

500 ns

875 ns

1000 ns

1600 ns

3125 ns t

125 ns

125 ns t blank

500 ns

375 ns

250 ns

250 ns t boost

0 ns

12/20 DocID027011 Rev 1

UM1829 Device configuration

3.4

Warning: important - a wrong gate driving setup may cause spurious overcurrent failures even if no load is connected to the power stage.

The suggested configuration for the demonstration board is the following:

 VCC value = 15 V.

 UVLO threshold = 11 V (10 V on boot).

 Gate current = 64 mA.

 Controlled current time = 500 ns.

 Deadtime = 125 ns.

 Blanking time = 375 ns.

 Turn OFF boost time = disabled.

Overcurrent and stall detection thresholds

The overcurrent protection and the stall detection are implemented measuring the drain source voltage of the MOSFETs, hence their value is a voltage and not a current.

The protection thresholds are set according to the voltage drop caused by the target triggering current on the MOSFET R dsON parameters increase with temperature).

at the expected operating temperature (in fact this

During the preliminary stages of evaluation, the max. value of 1000 mV can be set for both protections. The default value of 281.25 mV has a good probability to trigger the overcurrent alarm.

Warning: important - it is strongly discouraged to disable the overcurrent shutdown. It may result in critical failures.

DocID027011 Rev 1 13/20

Device configuration UM1829

The max. speed parameter is the maximum speed the motor will run. By default, it is about

1000 step/s. That means, if you send a command to run at 2000 step/s, the motor speed it limited at 1000 step/s.

This is an important safety feature in the final application, but not necessarily useful to evaluate the device performances. Setting the parameter to high values (e.g.: 6000 step/s) allows evaluating the maximum speed which can be achieved by the application under a test through the speed tracking command (Run), but it probably limits the possibility to use positioning commands (Move, GoTo, etc.).

The “Full-Step” speed parameter indicates the speed at which the system switches from microstepping to full step operation.

In voltage mode driving, it is always recommended to operate in microstepping and not to switch to the full step. Hence, this parameter should be greater than the maximum speed.

14/20 DocID027011 Rev 1

UM1829 Sensing resistors

Note:

In the advanced current control mode, the output current range is determined by the sensing resistors as indicated in the following formulas:

Equation 2

I peak,min

= 7.8 mV /R sense

Equation 3

I peak,max

= 1 V/R sense

Where 7.8 mV and 1 V are the minimum and the maximum value of the TVAL registers.

However the actual output current is usually limited by the power rating of the sensing resistors:

Equation 4

I =

R sense

(r.m.s. value)

The power rating of the sensing resistor determining the maximum output current is 50% of the nominal one.

If the operative range resulting from the sensing resistors which are mounted on the board is not suitable for the application, it is possible to change these components in order to fit the requirements.

The sensing resistors should make the current control operates with a peak reference voltage between 0.2 and 0.1 volts. This way the power dissipation on the sensing resistor is not excessive and the offset of the sensing circuitry does not affect the performance of the current control algorithm.

Equation 5

R sense

I peak

DocID027011 Rev 1 15/20

How to change the supply configuration of the board

5

UM1829

How to change the supply configuration of the board

The configuration of the supply voltages can be changed through the jumpers from J3 to J8 as listed in

Table 6 ,

Table 7

and

Table 8

Configuration JP3

Table 7. VCC supply configurations

JP4 VSREG range Notes

Internally generated from VS

Internally generated from a voltage source different from VS

Externally supplied

(equal to V

SREG

)

Closed Open V

+ 3 V ÷ 85 V

Open Open

Open Closed

+ 3 V ÷ VS

7.5 V ÷ 15 V

Default.

value is determined by the internal regulator configuration.

External protection diode could be required (see following).

Note: When the VCC voltage of 7.5 V is used, the charge pump diodes should be replaced with low drop ones (suggested part BAR43SFILM). Otherwise the resulting boot voltage could be lower than the respective UVLO threshold and the device is not operative.

When the VSREG pin is not shorted to VS (JP1 is open), particular care must be taken in order to avoid that the VBOOT voltage falls below the VSREG one (e.g.: VS is floating and

VSREG is supplied). In this case the internal ESD diode is turned on and the device could be damaged.

Adding a low drop diode between VSREG and VS protects the internal ESD diode from this event (the charge pump diodes must also be low drop type).

Configuration

Table 8. VREG supply configurations

JP5 JP6 VCCREG range

Internally generated from VCC

Internally generated from a voltage source different from VCC

Externally supplied (equal to

CCREG

)

Closed Open

Open Open

Open Closed

6.3 V ÷ V

3.3 V

Notes

Default.

External protection diode could be required (see following).

When the VCCREG pin is not shorted to VCC (JP3 is open), particular care must be taken in order to avoid that the VCC voltage falls below the VCCREG one. In this case the internal

ESD diode is turned on and the device could be damaged.

Adding a low drop diode between VCCREG and VCC protects the internal ESD diode from this event.

16/20 DocID027011 Rev 1

UM1829 How to change the supply configuration of the board

Configuration JP7

Table 9. VDD supply configurations

JP8 VDD range Notes

Supplied by VREG Closed Open 3.3 V Default, 3.3 V logic.

Supplied by SPI connectors Open Closed 3.3 V or 5 V 3.3 V when connected to the STEVAL-PCC009V2.

Supplied by VDD test point Open Open 3.3 V or 5 V Must be 3.3 V if connected to the STEVAL-PCC009V2.

DocID027011 Rev 1 17/20

Daisy chaining UM1829

Note:

More demonstration boards can be connected in the daisy chain mode.

To drive two or more boards in daisy chain configuration:

Connect the STEVAL-PCC009V2 board 10-pin connector to the SPI_IN connector of the first demonstration board through the 10-pole flat cable.

2. Open the termination jumper (see Section 3.1 on page 11

and Section 3.2 on page 12 ).

3. Connect the SPI_OUT connector of the first demonstration board to the SPI_IN of the next one through the 10-pole flat cable.

4. Repeat point 2 and 3 for all the others board of the chain but the last one.

5. Check the termination jumpers of the demonstration boards: all the jumpers but the last one should be opened.

Increasing the number of devices connected in the chain could degrade SPI communication performances. If communication issues occur, try reducing the SPI clock speed.

18/20 DocID027011 Rev 1

UM1829

Date

07-Oct-2014

Table 10. Document revision history

Revision Changes

1 Initial release.

Revision history

DocID027011 Rev 1 19/20

UM1829

IMPORTANT NOTICE – PLEASE READ CAREFULLY

STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on

ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.

Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products.

No license, express or implied, to any intellectual property right is granted by ST herein.

Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.

ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.

Information in this document supersedes and replaces information previously supplied in any prior versions of this document.

20/20 DocID027011 Rev 1

สวัสดี! ฉันคือแชทบอท AI ที่ได้รับการฝึกฝนมาโดยเฉพาะเพื่อช่วยเหลือคุณเกี่ยวกับ STMicroelectronics STEVAL-PCC009V2 User Manual ฉันได้ตรวจสอบเอกสารอย่างละเอียดและสามารถช่วยคุณค้นหาข้อมูลที่ต้องการได้อย่างแม่นยำ หรืออธิบายเนื้อหาด้วยคำศัพท์ที่ชัดเจนและเรียบง่าย ไม่ว่าคุณกำลังมองหาคำแนะนำเกี่ยวกับคุณสมบัติเฉพาะ ขั้นตอนการแก้ไขปัญหา หรือการใช้งานทั่วไป โปรดถามคำถามของคุณได้อย่างอิสระ ยิ่งคุณให้รายละเอียดเกี่ยวกับข้อกังวลหรือความต้องการของคุณมากเท่าไหร่ ฉันก็จะสามารถช่วยเหลือคุณได้อย่างแม่นยำและมีประสิทธิภาพมากขึ้นเท่านั้น!