TA7259P_06_技术文档

TA7259P/F/FG

TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC

TA7259P, TA7259F/FG

3-PHASE BRUSHLESS DC MOTOR DRIVER IC

The TA7259P/F/FG is a 3−phase Bi-directional motor driver IC.

It designed as an output driver for motors in VTR (capstan,

cylinder, and reel), tape deck, floppy disk, and record player

applications.

To detect position, use of a position sensing device is

recommended.

FEATURES

z Wide operating supply voltage range: V

MIN. = 7 V

CC (opr.)

z Forward and reverse rotation is controlled simply by means of a

CW / CCW control signal fed into FRS.

z High sensitivity of position sensing amplifier.

(V = 10 mV (Typ.), TOSHIBA Ga−As Hall sensor “THS” series

H

is recommended.

z 3−phase Bi-directional driver and output current up to ±1.2 A.

z Few external parts required.

z Surge-protect diode connected for all input terminals (position

sensing, control, CW / CCW control inputs).

Weight

The TA7259FG is a Pb free product.

The TA7259P is an Sn-plated product including Pb.

The following conditions apply to solderability:

*Solderability

HDIP14−P−500−2.54A : 3.00 g (Typ.)

HSOP20−P−450−1.00 : 0.79 g (Typ.)

1. Use of Sn-37Pb solder bath

*solder bath temperature = 230°C

*dipping time = 5 seconds

*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

1

2006-4-14

TA7259P/F/FG

BLOCK DIAGRAM

TA7259P/TA7259F/FG

Control input

CW/CCW switch

Position sensing input

PIN FUNCTION

PIN No.

SYMBOL

H +

FUNCTION DESCRIPTION

b−phase Hall Amp. positive input terminal

P TYPE

1

F/FG TYPE

1

2

b

2

3

H

b

−

b−phase Hall Amp. negative input terminal

c−phase Hall Amp. positive input terminal

c−phase Hall Amp. negative input terminal

Output current detection terminal

c−phase drive output terminal

3

H +

c

4

5

H −

5

10

6

R

F

c

6

L

7

11

12

13

15

16

18

19

20

Fin

b−phase drive output terminal

b

8

V

Power supply input terminal

CC

9

L

a−phase drive output terminal

a

10

11

12

13

14

Fin

FRS

Forward / Reverse / Stop switch terminal

Control Amp, negative input terminal

Control Amp, positive input terminal

a−phase Hall Amp. positive input terminal

a−phase Hall Amp. negative input terminal

GND Terminal

V

−

IN

V

+

H +

a

H

a

−

GND

F/FG type: NO. 4, 7, 8, 9, 14, 17 pins are no connection.

2

2006-4-14

TA7259P/F/FG

INPUT vs. OUTPUT

V

NF

declares R voltage drop.

F

In star-connection;

=R × I

V

(I : Coil current)

L

NF

F

L

Refer to the diagram below.

When V

and V pins short-circuit or when V is equal to or greater than V , rotating becomes zero torque.

IN- 11 12

IN+

However, zero torque status is also achieved by setting the FRS input pin to the specified voltage or open status. In

this case, power consumption is reduced.

3

2006-4-14

TA7259P/F/FG

FUNCTION

FRS

POSITION SENSING INPUT

COIL OUTPUT

(10 PIN)

H

a

H

b

H

c

L

c

a

b

1

0

1

H

L

M

L

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

H

M

L

M

H

M

L

M

H

M

H

M

L

M

L

H

M

L

M

H

M

H

L

M

H

L

M

High Impedance

Notes)

・

Position sensing input;

“1”: Energizing +10mV or more to the positive side of each position sensing input.

“0”: Energizing －10mV or less to the negative side of each position sensing input.

In this case, DC voltage must be within the same-phase voltage range of the position sensing input.

Coil output;

1

“H”: V

“M”: ≒ V

“L”: V

−

V

SAT1

CC

2

CC

SAT2

FRS input;

“L”: Applied voltage within the specified range of V .

F

“H”: Applied voltage within the specified range of V .

R

“M”: Applied voltage within the specified range of V .

S

During testing, necessary voltage must be applied to the control input (V , V ) and the circuit must be

IN+ IN-

driven status.

4

2006-4-14

TA7259P/F/FG

Control signal input

In the initial state of the TA7259P/F/FG, the control voltage is usually input either by an F/V inverter or

such like, where the voltage is in proportion or inverse proportion to the number of rotations, or independently.

Though output (R pin) gain from the TA7259 control is specified in the table as 15 times, it can be reduced

F

to improve the characteristics of W/F etc. by applying NF.

An example of the application is shown below.

Whether NF is applied or not, the DC voltage (V

V

−) of the control input (V + pin and V − pin)

IN+ and IN IN IN

must be within the specified range (2.0 to V −2.5V). When the input DC level and F/V conversion output

CC

(control output) cannot interface with the IC input, input DC level shift and attenuator before IC input.

One example is shown in Figure 1−c.

a) Positive input

TA7259P/F/FG

VZ(5V is recommended)

Figure 1-a

b) Negative input

TA7259P/F/FG

Figure 1-b

Control input

Input pin

Figure 1-c

Control output is level shifted with DC content by zenner diode and attenuator, with control signal content by R

1

and R .

2

5

2006-4-14

TA7259P/F/FG

Position sensing drive

Both constant current drive and constant voltage drive are available because the same-phase voltage range

of the position sensing device is wide. (Spec.: 2～V −2.5V. When V 12V, the range is 2 to 9.5V).

CC

CC is

We recommend use of the TOSHIBA THS series of Ga-As position sensing devices.

In comparison with an In-Sb position sensor, the Ga−As sensor is mechanically stronger, has better

temperature characteristics, and is less prone to saturation by magnetism or current. However, its application

has been limited by its lower sensitivity when compared with the In-Sb type.

As for the TA7259, a Ga-As position sensor can be applied by improving the sensitivity of its input amp and

reducing the offset. When W/F characteristics are poor, increasing the position sensing input may be effective.

However, take care not to exceed the maximum permissible input.

Position sensing drive (1)

(For details, refer to the technical documents of the Toshiba THS series of Ga-As position sensing devices.)

6

2006-4-14

TA7259P/F/FG

ABSOLUTE MAXIMUM RATINGS (Ta = 25°C)

CHARACTERISTIC

Supply Voltage

SYMBOL

RATING

UNIT

V

26

1.2

V

A

CC

Output Current

I

O

TA7259P

2.3

Power Dissipation

P (Note)

D

W

TA7259F/FG

1.0

Operating Temperature

Storage Temperature

T

−30~75

−55~150

°C

opr

T

stg

Note: IC only.

ELECTRICAL CHARACTERISTICS (Unless otherwise specified, V = 12 V, Ta = 25°C)

CC

TEST

CIR−

CUIT

CHARACTERISTIC

SYMBOL

TEST CONDITION

MIN

TYP.

MAX

UNIT

I

FRS open

FRS = 5 V

2

4

5

7

9

CC1

CC2

CC3

Quiescent Current

1

mA

2

V

= 22 V, FRS = GND

2

5

9

CC

Input Offset Voltage

Residual Output Voltage

Voltage Gain

V

1

―

40

0

―

10

―

1.5

1.0

20

―

mV

―

IO

V

−

IN

= V + = 7 V

IN

OR

G

1

―

15.0

1.0

0.4

―

10

V

Upper

Lower

Upper

Lower

V

I

2

SAT1

SAT2

OC1

Saturation Voltage

I = 400 mA

L

V

2

―

1

Cut−off Current

V

= 20 V

µA

C

I

OC2

Position Sensing Input Sensitivity

V

―

mA

H

Maximum Position Sensing Input

Voltage

V

MAX.

1

―

400

mV

p−p

H

Position

Input Operating Voltage

Control

CMR

1

―

2.0

―

V

− 2.5

H

CC

V

− 2.5

C

CC

CW

V

0

0.4

F

S

R

Rotation Control Input

Voltage (FRS input)

V

STOP

―

2.5

4.5

3.0

5.0

3.5

5.8

CCW

V

7

2006-4-14

TA7259P/F/FG

Test circuit 1

Control input

(OFF in testing Icc)

TA7259

P/F/FG

Position

sensing

device

FRS input

Test circuit 2

Control input

Testing upper

Testing under

TA7259

P/F/FG

Position

sensing

device

8

2006-4-14

TA7259P/F/FG

Notes on handling the IC

Motor drive ICs are easily affected by parasitic vibration and unnecessary feedback. This is because the

number of high impedance pins, such as position sensing inputs and control signal inputs, is large, and the

output current value is high and switched.

Moreover, because it is coil loading, care must be taken not to allow the impulse to destroy the IC during

ON/OFF switching. Especially when using a high voltage supply (Vcc is 18V or more), care must be taken not to

apply voltage and current to the output transistor which exceed the specification. Use of a supply voltageof 18V

or less is recommended. Pay particular attention to the notes above when using a supply voltage over 18V.

(1) Notes in designing reliability

ⅰ) Do not expose the output transistor of the internal IC to high voltage and current,

especially, in motor lock status, ON/OFF switching of Vcc, output short-circuiting, etc.)

ⅱ) The output condenser for ringing absorption should be as small as possible because the output

transistor can be destroyed by the charge-discharge current of this condenser. When there is a

problem, adjusting the capacity of the condenser, the connecting position and the connecting method

(delta or star), and inserting a series resistor (of a few Ω to dozens of Ω) to the condenser and series

should provide the oscillating protection explained later.

ⅲ) In mounting to the print-board, do not stress the FIN, and solder for only a few seconds at 260℃.

ⅳ) Using the large earth area of the print-board to release heat from the FIN is effective in ensuring

reliability.

(2) Notes in wiring

To protect from parasitic vibration, design the print-pattern following the method below.

ⅰ) The output coil current path must be separated from other GND lines because a switched high

current flows in this path. It is very important that the line (R pin→R resister→GND) should not

F

be of a common impedance with other circuits.

If the above is impossible or the oscillation cannot be removed completely, connect the condenser

(0.01～0.1µF) and R in parallel.

F

TA7259P/F/FG

Avoid common impedance with other circuits

Fig. 2

図2.

9

2006-4-14

TA7259P/F/FG

ⅱ) The drive current path of the position sensing device should be connected to the GND independently.

It should be separated especially from the output current path.

If there is a plunge in position sensing device, insert the condenser (0.05~1µF) between + pin and –

pin of each position sensing device.

If there is a plunge in control input, insert the condenser (0.001～0.1µF) between this pin and the

GND.

TA7259P/F/FG

Do not have common impedance with other

circuits.

Fig. 3

図3.

ⅲ) If upper oscillation (5MHz or more) is found, connect the condensers commonly from each coil output

and then insert the condenser (C = 0.01～0.1µF) between this connecting point and R pin. (Fig.4−a)

F

Aside from using a ringing absorbing condenser, consider a different method to connect the

condenser between each coil output and R pin. (Fig 4−b)

F

TA7259

P/F/FG

Fig. 4-a

Fig. 4-b

図4-b

図4-a

ⅳ) Make sure to take the power supply from V

CC

(“8” pin) directly. Design the circuit not to have the

common impedance toward GND.

TA7259

P/F/FG

Use of C (0.01～0.1µF) is also effective.

2

Fig. 5

図5.

10

2006-4-14

TA7259P/F/FG

(3) Connecting condenser for output ringing absorption

We recommend connecting a condenser between each coil and the GND for output ringing absorption .

However, other methods below can be also applied to prevent oscillation and destruction.

ⅰ) Changing capacity.

ⅱ) Delta connection (Fig.6−a)

ⅲ) Connect to V

not to the GND. (Fig. 6−b) In this case; take care not to let the IC be destroyed.

CC,

If voltage-current locus is beyond the ASO, series resistance or equivalent must be inserted.

ⅳ) Connect to R pin.

F

ⅴ) Insert a resistance between condenser and series. (Fig. 6−c)

ⅵ) Combination of ⅰ), ⅱ), ⅲ), and ⅳ).

TA7259

P/F/FG

TA7259

P/F/FG

Use bipolar condenser.

Fig. 6-a

Fig. 6-b

TA7259

P/F/FG

Fig. 6-c

Others

The output transistor of the IC can be destroyed when the capacity of the output condenser or its connection is

not appropriate. To prevent destruction, confirm the voltage-current locus of the output transistor gained from

the test (see the figure below) is within the ASO. It is especially important to measure the output transistor in

SW’s ON/OFF timing and the sequence of normal rotation, reverse rotation, and normal rotation.

Current probe

To Y-axis of oscilloscope

Current- voltage locus

Applying not only La but Lb

and Lc is recommended.

To X-axis of oscilloscope

Fig. 7

11

2006-4-14

TA7259P/F/FG

Application circuit 1

Control signal input

Normal/Reverse SW

TA7259

P/F/FG

Position detection.

Constant voltage/

constant current drive.

(Constant current drive

is shown in this figure.)

Coil current

Hall supply

※1:

V of zenner diode should correspond to DC level of control signal input.

Z

(V = 2.5～9V. In considering temperature characteristics, applying 5V is recommended. DC voltage of

Z

negative control input (V −pin) equals V +R ・I

L.

IN

Z

F

※2:

※3:

R is determined by the coil impedance, F/V converter voltage (control input), and necessary starting torque.

F

However, please apply within the range of 0.3 to 5Ω.

Connect this condenser when there is a plunge in control input.

Application circuit 2

Control signal input

TA7259

P/F/FG

Position sensing device

Normal/Reverse SW

Note:

Utmost care is necessary in the design of the output, V , V , and GND lines since the IC may be

CC

M

destroyed by short-circuiting between outputs, air contamination faults, or faults due to improper grounding, or

by short-circuiting between contiguous pins.

12

2006-4-14

TA7259P/F/FG

TA7259F/FG

TA7259P

13

2006-4-14

TA7259P/F/FG

PACKAGE DIMENSIONS

HDIP14−P−500−2.54A

Unit: mm

Weight: 3.00 g (Typ.)

14

2006-4-14

TA7259P/F/FG

HSOP20−P−450−1.00

Unit: mm

Weight: 0.79 g (Typ.)

15

2006-4-14

TA7259P/F/FG

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 device breakdown, damage or deterioration, and may result in

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 break down completely 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 lead to 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 device breakdown, damage or deterioration, and may result in

injury by explosion or combustion.

In addition, do not apply current to any device that is incorrectly inserted or oriented, even for an

instant.

16

2006-4-14

TA7259P/F/FG

Points to remember on handling of ICs

(1) Heat Radiation Design

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

device so that heat is appropriately radiated, so as not to exceed the specified junction temperature

(T_J) at any time and condition. These ICs generate heat even during normal use. An inadequate IC

heat radiation design can lead to a decrease in IC life, deterioration of IC characteristics or IC

breakdown. In addition, please design the device taking into consideration the effect of IC heat

radiation on peripheral components.

(2) Back-EMF

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

17

2006-4-14

TA7259P/F/FG

18

2006-4-14


型号：	TA7259P_06
厂家：	TOSHIBA
描述：	3-PHASE BRUSHLESS DC MOTOR DRIVER IC 3相无刷直流电动机驱动器IC 驱动器
文件：	总18页 (文件大小：423K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TA7259P_06 [TOSHIBA]

相关型号：

TA7260P

TA7261P

TA7262

TA7262F

TA7262F(EL)

TA7262F(ER)

TA7262F(TP1)

TA7262P

TA7262P(LB)

TA7263P

TA7264

TA7264P