TB6568KQ_技术文档

TB6568KQ

TOSHIBA Bi-CMOS Integrated Circuit Silicon Monolithic

TB6568KQ

Full-Bridge DC Motor Driver IC

The TB6568KQ is a full-bridge DC motor driver IC employing

the MOS process for output power transistors.

The low ON-resistance MOS process and PWM control enables

driving DC motors with high thermal efficiency.

Four operating modes are selectable via IN1 and IN2: clockwise

(CW), counterclockwise (CCW), Short Brake and Stop.

Features

•

Power supply voltage: 50 V (max)

Output current: 3 A (max)

Weight: 2.2 g (typ.)

Output ON-resistance: 0.55 Ω (typ.)

PWM control

CW/CCW/Short Brake/Stop modes

Overcurrent shutdown circuit (ISD)

Overvoltage shutdown circuit (VSD)

Thermal shutdown circuit (TSD)

Undervoltage lockout circuit (UVLO)

Dead time for preventing shoot-through current

Note: The following conditions apply to solderability:

About solderability, following conditions were confirmed

(1) Use of Sn-37Pb solder Bath

• solder bath temperature: 230°C

• dipping time: 5 seconds

• the number of times: once

• use of R-type flux

(2) Use of Sn-3.0Ag-0.5Cu solder Bath

• solder bath temperature: 245°C

• dipping time: 5 seconds

• the number of times: once

• use of R-type flux

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TB6568KQ

Block Diagram (application circuit example)

The application circuits shown in this document are provided for reference purposes only. Thorough evaluation is

required, especially at the mass production design stage.

Toshiba does not grant any license to any industrial property rights by providing these examples of application

circuits.

VM

5-V regulator

UVLO

VSD

TSD

ISD detection

OUT1

OUT2

IN1

IN2

Control

Predriver

Motor

ISD detection

ISD

ISD detection

GND

Pin Functions

Pin No.

Pin Name

Functional Description

1

2

3

4

5

6

7

IN1

IN2

Control signal input pin 1

Control signal input pin 2

Output pin 1

OUT1

GND

OUT2

N.C.

VM

Ground pin

Output pin 2

No-connect

Power supply voltage pin

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TB6568KQ

Absolute Maximum Ratings (Note) (Ta = 25°C)

Characteristics

Power supply voltage

Symbol

VM

Rating

Unit

50

V

Output voltage

V

50

O

Output current

I

O

(peak)

3

A

Input voltage

V

−0.3 to 5.5

1.25 (Note 1)

−40 to 85

−55 to 150

V

IN

Power dissipation

Operating temperature

Storage temperature

P

W

°C

D

T

opr

T

stg

Note: The absolute maximum ratings of a semiconductor device are a set of ratings that must not be exceeded, even

for a moment. Do not exceed any of these ratings.

Exceeding the rating (s) may cause the device breakdown, damage or deterioration, and may result injury by

explosion or combustion.

Please use the TB6568KQ within the specified operating ranges.

Note 1: No heatsink

Operating Ranges

Characteristics

Power supply voltage

Symbol

Rating

Unit

VM

10 to 45

Up to 100

V

kHz

A

opr

PWM Frequency

Output Current

f

PWM

I

O

(Ave.)

Up to 1.5 (Note 2) (given as a guide)

Note 2: Ta = 25°C, the TB6568KQ is mounted on the PCB (70 × 50 × 1.6 (mm), double-sided, Cu thickness: 50 μm,

Cu dimension: 67%) with no heatsink.

*: The average output current shall be increased or decreased depending on usage conditions such as ambient

temperature, a presence/absence of a heatsink and IC mounting method.

Please use the average output current so that the junction temperature of 150°C (T ) and the absolute maximum

j

output current rating of 3 A are not exceeded.

**: Connecting the metal plate on the rear surface of the TB6568KQ to a heatsink allows for improvement of the

power dissipation capability of the TB6568KQ. Please consider heat dissipation efficiency when designing the

board layout.

Moreover, this metal plate is electrically connected to the rear surface of the TB6568KQ; therefore, it must always

be insulated or shorted to ground.

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TB6568KQ

Electrical Characteristics (unless otherwise specified, Ta = 25°C, VM = 24 V)

Characteristics

Symbol

Test Condition

Min

Typ.

Max

Unit

mA

I

Stop mode

⎯

2

2.5

⎯

8

CC1

CC2

CC3

Power supply current

CW/CCW mode

Short Brake mode

8

V

5.5

0.8

⎯

75

5

INH

Input voltage

V

0

⎯

INL

IN (HYS)

Control circuit

IN1 pin,

Hysteresis voltage

Input current

V

⎯

1

0.4

50

IN2 pin

I

V

= 5 V

= 0 V

INH

IN

μA

I

⎯

INL

PWM frequency

f

Duty: 50 %

100

⎯

0.9

⎯

2

kHz

μs

PWM

PWM (TW)

PWM minimum pulse width

Output ON-resistance

f

(value given as a guide)

R

I

= 3 A

O

⎯

−2

⎯

0.55

⎯

Ω

ON (U + L)

I

VM = 50 V, V

= 0 V

L (U)

OUT

Output leakage current

Diode forward voltage

μA

I

VM = V

= 50 V

⎯

L (L)

OUT

V

I

= 3 A

1.3

1.7

F (U)

O

V

= −3 A

F (L)

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TB6568KQ

Thermal Performance Characteristics

Thermal Resistance

P

– Ta

D

14

12

10

8

(1) With a heatsink (10°C/W):

Ta = 25°C, P = 7.8 W

D

(2) No heatsink:

Ta = 25°C, P = 1.25 W

D

*: With an infinite heatsink:

R

th (j-c)

= 6°C/W

(1)

6

4

Pulse width

t

(s)

(2)

2

0

25

50

75

100

125

150

Ambient temperature Ta (°C)

I/O Equivalent Circuits

The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory

purposes.

Pin No.

I/O Signal

I/O Internal Circuit

10 kΩ

(typ.)

Digital input

L: 0.8 V (max)

H: 2 V (min)

IN1 (IN2)

IN1 (1)

IN2 (2)

VM

5-V regulator

OUT1 (3)

OUT2 (5)

GND (4)

VM (7)

OUT1 (OUT2)

Operating supply voltage range

VM = 10 to 45 V

GND

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TB6568KQ

Functional Description

The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory

purposes.

Timing charts may be simplified for explanatory purposes.

1. I/O Function Table

Input

Output

IN1

H

IN2

H

OUT1

OUT2

Mode

L

H

L

Short Brake

L

H

CW/CCW

CCW/CW

Stop

H

L

H

L

OFF (Hi-Z)

(caused by a release of TSD/ISD)

2. Undervoltage Lockout Circuit (UVLO)

The TB6568KQ incorporates an undervoltage lockout circuit. If the power supply voltage drops under 8 V

(typ.), all the output transistors are turned off (Hi-Z).

The UVLO circuit has a hysteresis of 0.7 V (typ.); thus the TB6568KQ recovers at 8.7 V (typ.).

UVLO operation

8.7 V (typ.)

8.0 V (typ.)

VM voltage

UVLO operation

H

UVLO internal signal

L

H

OUT1, OUT2

L

Normal operation

OFF (Hi-Z)

Normal operation

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TB6568KQ

3. Overvoltage Shutdown Circuit (VSD)

The TB6568KQ incorporates an overvoltage shutdown circuit. When the power supply voltage exceeds 53 V

(typ.), all the output transistors are turned off (Hi-Z).

The VSD circuit has a hysteresis of 3 V (typ.); thus the TB6568KQ resumes the normal operation at 50 V

(typ.).

VSD operation

53 V (typ.)

50 V (typ.)

VM voltage

VSD operation

H

VSD internal signal

L

H

OUT1, OUT2

L

Normal operation

OFF (Hi-Z)

Normal operation

Note: The VSD circuit is activated if the absolute maximum voltage rating is violated. Note that the circuit is

provided as an auxiliary only and does not necessarily provide the IC with a perfect protection from any

kind of damages.

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TB6568KQ

4. Thermal Shutdown Circuit (TSD)

The TB6568KQ incorporates a thermal shutdown circuit. If the junction temperature (T ) exceeds 170°C

j

(typ.), all the output transistors are turned off (Hi-Z).

The shutdown is released and the TB6568KQ resumes the normal operation when both the IN1 pin and IN2

pin are driven Low.

TSD = 170°C (typ.)

TSD operation

170°C (typ.)

Chip temperature:

Junction temperature (T )

j

H

TSD internal signal

L

H

IN1, IN2

More than 1 μs (typ.)

L

H

OUT1, OUT2

L

Normal operation

OFF (Hi-Z)

Normal operation

Note: The TSD circuit is activated when the junction temperature (T ) violates the rating temperature of 150°C.

j

Note that the circuit is provided as an auxiliary only and does not necessarily provide the IC with a perfect

protection from any kind of damages.

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TB6568KQ

5. Overcurrent Shutdown Circuits (ISD)

The TB6568KQ incorporates overcurrent shutdown (ISD) circuits monitoring the current that flows through

each of all the four output power transistors.

The threshold current ranges from 3 A to 6 A. If any of the ISDs detects an overcurrent for more than 5.1 μs

(typ.), which is the predefined detection time, all the output transistors are turned off and enter High

impedance state.

The shutdown is released and the TB6568KQ resumes the normal operation when both the IN1 pin and IN2

pin are driven Low.

ISD operation

Threshold

Output current

0

5.1 μs

(typ.)

H

ISD internal signal

L

H

IN1, IN2

More than 1 μs (typ.)

L

OUT1, OUT2

Normal operation

OFF (Hi-Z)

Normal operation

Note: The ISD is activated if the absolute maximum current rating is violated. Note that the circuit is provided as

an auxiliary only and does not necessarily provide the IC with a perfect protection from damages due to

overcurrent caused by power fault, ground fault, load-short and the like.

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TB6568KQ

6. PWM Control

Switching input through the IN1 and IN2 pins enables the PWM control of the motor driver.

When the motor drive is controlled by the PWM input, the TB6568KQ repeats operating in Normal

Operation mode and Short Brake mode alternately.

For preventing the shoot-through current in the output circuit caused by the upper and lower power

transistors being turned on simultaneously, the dead time is internally generated at the time the upper and

lower power transistors switches between on and off.

This eliminates the need of inserting Off time externally; thus the PWM control with synchronous

rectification is enabled.

Note that inserting Off time externally is not required on operation mode changes between CW and CCW,

and CW (CCW) and Short Brake, again, because of the dead time generated internally.

VM

OUT1

M

OUT1

M

OUT1

M

GND

PWM ON

t1

PWM ON → OFF

t2 = 200 ns (typ.)

PWM OFF

t3

VM

OUT1

M

OUT1

M

GND

PWM OFF → ON

t4 = 500 ns (typ.)

PWM ON

t5

VM

t5

Output voltage

waveform

(OUT1)

t1

t3

GND

t4

t2

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TB6568KQ

7. Output Circuits

The switching characteristics of the output transistors provided to the OUT1 pin and OUT2 pin are as

follows:

Characteristic

Value

Unit

ns

t

650 (typ.)

450 (typ.)

90 (typ.)

pLH

pHL

t

r

t

130 (typ.)

f

PWM input

(IN1, IN2)

t

pLH

t

pHL

90%

50%

90%

50%

Output voltage

(OUT1, OUT2)

10%

t

r

f

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TB6568KQ

Package Dimensions

Weight: 2.2 g (typ.)

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TB6568KQ

Notes on Contents

1. Block Diagrams

Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for

explanatory purposes.

2. Equivalent Circuits

The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory

purposes.

3. Timing Charts

Timing charts may be simplified for explanatory purposes.

4. Application Circuits

The application circuits shown in this document are provided for reference purposes only. Thorough

evaluation is required, especially at the mass production design stage.

Toshiba does not grant any license to any industrial property rights by providing these examples of

application circuits.

5. Test Circuits

Components in the test circuits are used only to obtain and confirm the device characteristics. These

components and circuits are not guaranteed to prevent malfunction or failure from occurring in the

application equipment.

IC Usage Considerations

Notes on Handling of ICs

(1) The absolute maximum ratings of a semiconductor device are a set of ratings that must not be

exceeded, even for a moment. Do not exceed any of these ratings.

Exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result

injury by explosion or combustion.

(2) Use an appropriate power supply fuse to ensure that a large current does not continuously flow in case

of over current and/or IC failure. The IC will fully break down when used under conditions that exceed

its absolute maximum ratings, when the wiring is routed improperly or when an abnormal pulse noise

occurs from the wiring or load, causing a large current to continuously flow and the breakdown can

lead smoke or ignition. To minimize the effects of the flow of a large current in case of breakdown,

appropriate settings, such as fuse capacity, fusing time and insertion circuit location, are required.

(3) If your design includes an inductive load such as a motor coil, incorporate a protection circuit into the

design to prevent device malfunction or breakdown caused by the current resulting from the inrush

current at power ON or the negative current resulting from the back electromotive force at power OFF.

IC breakdown may cause injury, smoke or ignition.

Use a stable power supply with ICs with built-in protection functions. If the power supply is unstable,

the protection function may not operate, causing IC breakdown. IC breakdown may cause injury,

smoke or ignition.

(4) Do not insert devices in the wrong orientation or incorrectly.

Make sure that the positive and negative terminals of power supplies are connected properly.

Otherwise, the current or power consumption may exceed the absolute maximum rating, and

exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result

injury by explosion or combustion.

In addition, do not use any device that is applied the current with inserting in the wrong orientation or

incorrectly even just one time.

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TB6568KQ

Points to Remember on Handling of ICs

(1) Over Current Protection Circuit

Over current protection circuits (referred to as current limiter circuits) do not necessarily protect ICs

under all circumstances. If the Over current protection circuits operate against the over current, clear

the over current status immediately.

Depending on the method of use and usage conditions, such as exceeding absolute maximum ratings

can cause the over current protection circuit to not operate properly or IC breakdown before operation.

In addition, depending on the method of use and usage conditions, if over current continues to flow for

a long time after operation, the IC may generate heat resulting in breakdown.

(2) Thermal Shutdown Circuit

Thermal shutdown circuits do not necessarily protect ICs under all circumstances. If the thermal

shutdown circuits operate against the over temperature, clear the heat generation status immediately.

Depending on the method of use and usage conditions, such as exceeding absolute maximum ratings

can cause the thermal shutdown circuit to not operate properly or IC breakdown before operation.

(3) Heat Radiation Design

In using an IC with large current flow such as power amp, regulator or driver, please design the device

so that heat is appropriately radiated, not to exceed the specified junction temperature (T ) at any time

j

and condition. These ICs generate heat even during normal use. An inadequate IC heat radiation

design can lead to decrease in IC life, deterioration of IC characteristics or IC breakdown. In addition,

please design the device taking into considerate the effect of IC heat radiation with peripheral

components.

(4) Back-EMF

When a motor rotates in the reverse direction, stops or slows down abruptly, a current flow

back to the motor’s power supply due to the effect of back-EMF. If the current sink capability

of the power supply is small, the device’s motor power supply and output pins might be

exposed to conditions beyond maximum ratings. To avoid this problem, take the effect of

back-EMF into consideration in system design.

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TB6568KQ

RESTRICTIONS ON PRODUCT USE

•

Toshiba Corporation, and its subsidiaries and affiliates (collectively “TOSHIBA”), reserve the right to make changes to the information

in this document, and related hardware, software and systems (collectively “Product”) without notice.

This document and any information herein may not be reproduced without prior written permission from TOSHIBA. Even with

TOSHIBA’s written permission, reproduction is permissible only if reproduction is without alteration/omission.

Though TOSHIBA works continually to improve Product’s quality and reliability, Product can malfunction or fail. Customers are

responsible for complying with safety standards and for providing adequate designs and safeguards for their hardware, software and

systems which minimize risk and avoid situations in which a malfunction or failure of Product could cause loss of human life, bodily

injury or damage to property, including data loss or corruption. Before creating and producing designs and using, customers must also

refer to and comply with (a) the latest versions of all relevant TOSHIBA information, including without limitation, this document, the

specifications, the data sheets and application notes for Product and the precautions and conditions set forth in the “TOSHIBA

Semiconductor Reliability Handbook” and (b) the instructions for the application that Product will be used with or for. Customers are

solely responsible for all aspects of their own product design or applications, including but not limited to (a) determining the

appropriateness of the use of this Product in such design or applications; (b) evaluating and determining the applicability of any

information contained in this document, or in charts, diagrams, programs, algorithms, sample application circuits, or any other

referenced documents; and (c) validating all operating parameters for such designs and applications. TOSHIBA ASSUMES NO

LIABILITY FOR CUSTOMERS’ PRODUCT DESIGN OR APPLICATIONS.

•

Product is intended for use in general electronics applications (e.g., computers, personal equipment, office equipment, measuring

equipment, industrial robots and home electronics appliances) or for specific applications as expressly stated in this document.

Product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of quality and/or

reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or serious public

impact (“Unintended Use”). Unintended Use includes, without limitation, equipment used in nuclear facilities, equipment used in the

aerospace industry, medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic signaling

equipment, equipment used to control combustions or explosions, safety devices, elevators and escalators, devices related to electric

power, and equipment used in finance-related fields. Do not use Product for Unintended Use unless specifically permitted in this

document.

•

Do not disassemble, analyze, reverse-engineer, alter, modify, translate or copy Product, whether in whole or in part.

Product shall not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any

applicable laws or regulations.

•

The information contained herein is presented only as guidance for Product use. No responsibility is assumed by TOSHIBA for any

infringement of patents or any other intellectual property rights of third parties that may result from the use of Product. No license to

any intellectual property right is granted by this document, whether express or implied, by estoppel or otherwise.

ABSENT A WRITTEN SIGNED AGREEMENT, EXCEPT AS PROVIDED IN THE RELEVANT TERMS AND CONDITIONS OF SALE

FOR PRODUCT, AND TO THE MAXIMUM EXTENT ALLOWABLE BY LAW, TOSHIBA (1) ASSUMES NO LIABILITY

WHATSOEVER, INCLUDING WITHOUT LIMITATION, INDIRECT, CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OR

LOSS, INCLUDING WITHOUT LIMITATION, LOSS OF PROFITS, LOSS OF OPPORTUNITIES, BUSINESS INTERRUPTION AND

LOSS OF DATA, AND (2) DISCLAIMS ANY AND ALL EXPRESS OR IMPLIED WARRANTIES AND CONDITIONS RELATED TO

SALE, USE OF PRODUCT, OR INFORMATION, INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY, FITNESS

FOR A PARTICULAR PURPOSE, ACCURACY OF INFORMATION, OR NONINFRINGEMENT.

• Do not use or otherwise make available Product or related software or technology for any military purposes, including without limitation,

for the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile technology

products (mass destruction weapons). Product and related software and technology may be controlled under the Japanese Foreign

Exchange and Foreign Trade Law and the U.S. Export Administration Regulations. Export and re-export of Product or related software

or technology are strictly prohibited except in compliance with all applicable export laws and regulations.

•

Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS compatibility of Product.

Please use Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances,

including without limitation, the EU RoHS Directive. TOSHIBA assumes no liability for damages or losses occurring as a result of

noncompliance with applicable laws and regulations.

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型号：	TB6568KQ
厂家：	TOSHIBA
描述：	Full-Bridge DC Motor Driver IC 全桥直流马达驱动器IC 驱动器
文件：	总15页 (文件大小：230K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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