STMicroelectronics L62 Series Manuel utilisateur

Introduction

The L62xx family evaluation environment is a fast, robust, and easy-to-use solution that allows to evaluate all the brush DC

and stepper motor drivers of the L62xx family in combination with a NUCLEO-F401RE control board and the STSPIN Studio

software.

The kit includes:

• a compact main board (EVL62XX-MAIN) compatible with the Arduino UNO R3 connector

• one plug-in board (EVL62XX-PLUG) based on the DMOS dual full-bridge driver for motor control of the STMicroelectronics

L62xx family. In particular:

L6205, L6225, L6206, L6226, L6207 and L6227 to drive from one to four DC motors

L6208 and L6228 DMOS to drive one bipolar stepper motor.

The maximum ratings of the plug-in boards are:

• power stage supply voltage (VS) from 8 V to 50 V

• motor phase current up to 1.4 A r.m.s. (L6225, L6226, L6227 and L6228)

• motor phase current up to 2.8 A r.m.s. (L6205, L6206, L6207 and L6208)

Figure 1. L62XX evaluation environment mounting L6205 driver board

Dual brush DC motor and stepper motor evaluation kit

UM2871

User manual

UM2871 - Rev 1 - July 2021

For further information contact your local STMicroelectronics sales office.

www.st.com

1Getting started

The EVL62XX evaluation environment covers a wide range of applications and it is ready to be used in a few

steps.

Follow this procedure to start your evaluation:

1. Check the setting of the jumpers based on your configuration as described in Section 2: "Hardware

description and configuration".

2. Connect the plug-in board onto the main board.

3. Connect the main board with the STM32 Nucleo board through Arduino UNO R3.

4. Supply the board through the input 1 (VS) and 2 (ground) of the connector CN3.

Further support material is available on the respective product pages on www.st.com.

UM2871

Getting started

UM2871 - Rev 1 page 2/26

2Hardware description and configuration

Figure 2. EVL62XX-MAIN main board overview

CN1

Motor phases connector

CN2, CN3

Power connectors

50 V max

CN6

Arduino Uno R3 connector

CN5

Arduino Uno R3 connector

CN9

Arduino Uno R3 connector

CN6

Arduino Uno R3 connector

Plug-in board with selected device

R10

TOFF trimmer (Bridge B)

OCD threshold trimmer (Bridge B)

OCD threshold trimmer (Bridge A)

TOFF trimmer (Bridge A)

The following tables provide the detailed pinout of the Arduino UNO R3 and ST Morpho connectors.

Table 1. Arduino UNO R3 connector table (L62x5, L62x6 and L62x7 devices)

Connector Pin(1) Signal Remarks

CN5

3 Fault B

4 Enable B

5 ADC-6

7 Ground

CN9

3 Enable A

4 Fault A

5 IN2B

6 IN1B

7 VREFA L6207/L6227 only

CN8

1 IN1A

2 IN2A

3 ADC-4

4 VREFB L6207/L6227 only

CN6

2 VDD

6 Ground

7 Ground

1. All non-listed pins are not connected.

UM2871

Hardware description and configuration

UM2871 - Rev 1 page 3/26

Table 2. Arduino UNO R3 connector table (L62x8 devices)

Connector Pin(1) Signal Remarks

CN5

1 Reset

3 Fault

4 Enable

5 ADC-6

7 Ground

CN9

5 HALF/FULL

6 CONTROL

7 VREFA

CN8

1 CLOCK

2 CW/CCW

3 ADC-4

4 VREFB

CN6

2 VDD

6 Ground

7 Ground

1. All non-listed pins are not connected.

2.1 Overcurrent (OCD) threshold setting (L6206 and L6226)

The plug-in boards based on L6206 and L6226 devices integrate two overcurrent protection circuits with

adjustable threshold, one for each full-bridge.

The overcurrent threshold is set by means of R7 (bridge A) and R8 (bridge B) resistors of the main board,

according to Figure 3.

Below the value of RCL = 5 kΩ the overcurrent threshold converges non-linearly to the maximum value of the

selected device, 5.6 A±30% for L6206 and 2.8 A±30% for L6226.

Figure 3. L6206: Overcurrent threshold vs. resistor value (no paralleling)

5 6 7 8 9 10

ISOVER

[A]

RCL [Ω]

UM2871

Overcurrent (OCD) threshold setting (L6206 and L6226)

UM2871 - Rev 1 page 4/26

Figure 4. L6226: Overcurrent threshold vs. resistor value (no paralleling)

0.5

1.5

2.5

5 6 7 8 9 10

ISOVER

[A]

RCL [Ω]

When one of the paralleling modes is used, the actual OCD threshold value is scaled as indicated in Table 3.

Further details are available in the application note AN1762, “L6205, L6206, L6207 DUAL FULL-BRIDGE

DRIVERS”, on the st.com website.

2.2 TOFF setting (L6207, L6208, L227 and L6228)

The plug-in boards based on L6207, L6227, L6208 and L6228 devices integrate a variable TOFF time, one for

each full-bridge, that can be set by means of ROFF, R9 (bridge A) and R10 (bridge B) resistors of the main board,

according to Figure 5.

Further details are available in the application note AN1762, “L6205, L6206, L6207 DUAL FULL-BRIDGE

DRIVERS”, on the st.com website.

Figure 5. tOFF vs. ROFF

100

1000

1 10 100 1000

tOFF [µs]

ROFF [kΩ]

2.3 Driving mode selection (L6205, L6225, L6206 and L6226)

Plug-in boards mounting the L62x5 or L62x6 devices can drive from 1 to 4 DC motors at the same time.

UM2871

TOFF setting (L6207, L6208, L227 and L6228)

UM2871 - Rev 1 page 5/26

The driving mode selection is done by properly setting J5, J6, J7 and J8 solder jumpers on the top of the boards.

By default, all solder jumpers are open (two bidirectional DC motor driving configuration).

The table below briefly summarizes the possible configurations:

Table 3. Hardware configurations

Mode Max. output current Output

RDS(ON)

OCD threshold

scaling J5 J6 J7 J8

2-bidirectional - default

(Figure 6)

L6205, L6206

2.8 Arms

0.3Ω x1

L6225, L6226

1.4 Arms

4-unidirectional

(Figure 7)

L6205, L6206

2.8 Arms

0.3Ω x1 (1)

L6225, L6226

1.4 Arms

1-bidirectional

High current parallel

(Figure 8)

L6205, L6206

5.6 Arms

0.15Ω x2 X X

L6225, L6226

2.8 Arms

2-unidirectional

High current parallel

(Figure 9)

L6205, L6206

5.6 Arms

0.15Ω x2 X X

L6225, L6226

2.8 Arms

1-bidirectional

Low overcurrent parallel

(Figure 10)

L6205, L6206

2.8 Arms

0.15Ω x1 X X

L6225, L6226

1.4 Arms

2-bidirectional

Low overcurrent parallel

(Figure 11)

L6205, L6206

2.8 Arms

0.15Ω x1 X X

L6225, L6226

1.4 Arms

1-unidirection

All bridges parallel

(Figure 12)

L6205, L6206

11.2 Arms

0.075Ω x4 X X X X

L6225, L6226

5.6 Arms

1. The current limit is shared between the two motors connected on the same full-bridge (A or B).

UM2871

Driving mode selection (L6205, L6225, L6206 and L6226)

UM2871 - Rev 1 page 6/26

Figure 6. Two bidirectional DC motors

Figure 7. Four unidirectional DC motors

UM2871

Driving mode selection (L6205, L6225, L6206 and L6226)

UM2871 - Rev 1 page 7/26

Figure 8. One bidirectional DC motor – higher current

B-

B+

A+

A-

VVS

GND

Figure 9. Two unidirectional DC motors – higher current

B-

B+

A+

A-

VVS

GND

UM2871

Driving mode selection (L6205, L6225, L6206 and L6226)

UM2871 - Rev 1 page 8/26

Figure 10. One bidirectional DC motor – lower overcurrent

B-

B+

A+

A-

VVS

GND

Figure 11. Two unidirectional DC motors – lower overcurrent

B-

B+

A+

A-

VVS

GND

UM2871

Driving mode selection (L6205, L6225, L6206 and L6226)

UM2871 - Rev 1 page 9/26

Figure 12. One unidirectional DC motor – all bridges parallel

B-

B+

A+

A-

VVS

GND

UM2871

Driving mode selection (L6205, L6225, L6206 and L6226)

UM2871 - Rev 1 page 10/26

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