KA2822BDTF_技术文档

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KA2822D

3-Phase BLDC Motor Driver

Features

Description

• 3-phase, full-wave, linear BLDC motor driver

with 2 hall sensors

The KA2822D is a monolithic integrated circuit, and suit-

able for the three-phase spindle motor driver of FDD system.

• Built-in soft switching drive circuit

• 300 or 360 RPM speed control

• Snubberless

• Built-in chip enable function

• Built-in digital speed control circuit

• Built-in current limit circuit

• Index sensorless

28-SSOPH-375

• Built-in TSD (Thermal shutdown)

• Low saturation voltage

• Digital input: TTL, 5V CMOS compatible

• Built-in current-mode control circuit (I

: 1A)

PEAK

Typical Application

Ordering Information

• 3.5-inch floppy disk drive (FDD) spildle motor

• Other 3-phase BLDC motor

Device

Package

Operating Temp.

0 ~ 75°C

KA2822D

28-SSOPH-375

KA2822DTF 28-SSOPH-375

KA2822BD 28-SSOPH-375

KA2822BDTF 28-SSOPH-375

0 ~ 75°C

Rev. 1.0.1

May. 2000.

1

KA2822D

Pin Assignments

FG INPUT(−)

FG INPUT(+)

28

1

AGC

HALL BIAS

27

26

2

3

INDEX PULSE WIDTH

VOLTAGE REG

INDEX BURST

INDEX OUTPUT

CE

CURRENT DETECTION1

V INPUT(−)

25

24

23

22

4

5

V INPUT(+)

U PHASE OUTPUT

V PHASE OUTPUT

6

7

FIN

KA2822D

FIN

SIGNAL GROUND

FG ZERO CROSS

FG OUTPUT

W PHASE OUTPUT

NC

8

21

9

20

19

U INPUT(+)

10

RPM SELECT

CHARGE PUMP OUTPUT

OSC INPUT

U INPUT(−)

11

12

13

14

18

17

16

15

CURRENT DETECTION2

V

CC

PHASE COMPENSATION

NC

2

KA2822D

Pin Definitions

Pin Number

Pin Name

FG_INPUT

AGC

I/O

I

Pin Function Description

Negative input pin FG signal amp.

Automatic gain control input pin

Index pulse width detection (1.1V) pin

Voltage (2.2V) generator output pin

Index pulse width detection (1.4V) pin

Index pulse output pin

1

2

I

3

4

INDEX PULSE WIDTH

VOLTAGE REGULATOR

INDEX BURST

O

I

5

6

INDEX OUTPUT

CE

7

Chip enable (Active low)

8

SIGNAL GROUND

FG ZERO CROSS

FG OUTPUT

-

Signal ground

9

O

I

FG signal zero cross detection pin

FG signal output pin

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

FIN

RPM SELECT

RPM selection pin (L: 300, H: 360rpm)

Charge pump output pin

CHARGE PUMP OUTPUT

OSC INPUT

O

I

1MHz oscillation input pin

No connection

NC

-

PHASE COMPENSATION

I

Phase compensation cap. connection pin

5V power supply pin

V

-

CC

CURRENT DETECTION2

U INPUT (−)

I

Over current detection pin

Negative input pin of U phase amp

Positive input pin of U phase amp

No connection

I

U INPUT (+)

I

NC

-

W PHASE OUTPUT

V PHASE OUTPUT

U PHASE OUTPUT

U INPUT (+)

O

I

W phase output pin

V phase output pin

U phase output pin

Positive input pin of V phase amp

Negative input pin of V phase amp

Over current detection pin

Hall sensor bias input pin

Positive input pin of FG signal amp

Power ground

V INPUT (−)

I

CURRENT DETECTION1

HALL BIAS

I

FG INPUT (+)

I

POWER GROUND

-

3

KA2822D

Internal Block Diagram

CURRENT

V

DETECTION2 DETECTION1

CC

16

17

26

U INPUT (+)

19

+

U_OUT

23 U PHASE

OUTPUT

U_AMP

−

U INPUT(−)

18

24

V INPUT (+)

+

Output

Control

V_AMP

−

22 U PHASE

OUTPUT

V_OUT

W_OUT

V INPUT(−)

25

2

AGC

21

W PHASE

OUTPUT

HALL BIAS

Start-up

CE

27

7

Hall

Zero-cross

TSD

CE

CON_AMP

−

1.3V

FG_AMP

+

0.24V

0.69V

15

PHASE

COMPENSATION

FG INPUT(+) 28

+

FG

Zero-cross

−

FG INPUT(−)

1

+

BUF_AMP

10

9

FG OUTPUT

FG ZERO

CROSS

Burst_time

Circuit

Timing

Detectpr

Pulse_width

Adjustment

6

3

INDEX

OUTPUT

VOLTAGE REG.

4

INDEX PULSE

WIDTH

2.2V

5

INDEX BURST

OSC INPUT

Rpm_select

11_divider

Speed

Control

Charge

Pump

12

CHARGE

PUMP

OUTPUT

13

OSC

14

11

8

20

NC

RPM

SELECT

SIGNAL

GROUND

FIN

4

KA2822D

Equivalent Circuits

U_amp, V_ amp input

U, V, W drive output and current detection 1, 2

vcc

(17Pin,

26Pin)

V

CC

vcc

5kΩ

(16Pin)

2.5kΩ

U

V

(23Pin)

(19Pin,

25Pin)

(18Pin,

24Pin)

(22Pin)

W

(21Pin)

40k

Ω

40k

Ω

40k

Ω

FG input and FG output

OSC input

vcc

0.5k

Ω

0.5k

Ω

(28Pin)

0.1k

Ω

1k

Ω

(13Pin)

vcc

50pF

25k

vcc

Ω

5k

Ω

(10Pin)

CE input

Hall bias input and voltage regulator output

vcc

2.9V

vcc

(27Pin)

vcc

CE

3k

Ω

(4Pin)

2.2V

5

KA2822D

Equivalent Circuits (Continued)

Index pulse width detection output

Phase compensation and current detection 1, 2

vcc vcc vcc vcc

vcc

(15Pin)

(3Pin)

(17Pin,

26Pin)

2k

Ω

2k

Ω

RPM select input

vcc

AGC input

vcc

AGC

(2Pin)

6k

Ω

(11Pin)

To U amp, V amp

(Current control)

Index output

Index burst output

vcc

(6Pin)

2k

Ω

1.4V

(5Pin)

6

KA2822D

Equivalent Circuits (Continued)

FG zero cross output

vcc

(9Pin)

Charge pump output

vcc

to

(12Pin)

IIL

Circuit

vcc

Charge pump

Buffer amp

7

KA2822D

Absolute Maximum Rating (Ta=25°C)

Parameter

Symbol

Value

Unit

V

Maximum power supply voltage

Maximum input voltage

Maximum output current

Normal output current

Power dissipation

V

7.0

CCMAX

V

0 ~ V

1

V

INMAX

CC

I

A

OMAX

I

O

0.7

1.5

A

P

W

°C

D

Operating temperature

Junction temperture

T

A

0 ~ 75

150

T

J

Storage temperature

T

STG

−55 ~ +125

Power Dissipation Curve

2.0

1.5

1.0

Power

Dissipation

: PD[W]

0.5

0

25

50

75

100

125

150

175

Ambient temperature, Ta [°C]

Power dissipation decreases in the rate of 13.5mV / °C when mounted on 50mm × 50mm × 1mm PCB (Phenolic resin mate-

rial) and used above Ta=25°C.

Recommended Operating Conditions (Ta=25°C)

Parameter

Symbol

V , V

CC1 CC2

Min.

10.8

4.5

0

Typ.

12.0

5.0

-

Max

13.2

5.5

Unit

V

Supply voltage

Supply voltage in logic part

V

CC3

V

Ambient operating temperature range

Ta

+70

°C

Temperature Characteristic

Parameter

Symbol

Min.

Typ.

Max

Unit

Thermal shutdown temperature ^note

TSD

125

150

-

°C

NOTE:

Reference value

8

KA2822D

Electrical Characteristics

(Ta=25°C, V =5V)

CC

Parameter

Symbol

Conditions

Min. Typ. Max. Units

SUPPLY CURRENT

Supply current 1

I

V

=6.5V

CC

-

1.0

15

2.0

23

mA

CCO

CE=H, RPM=L

V =6.5V, CE=L

CC

Supply current 2

I

CC

CHIP ENABLE

Input current

I

CE=0~5V

-

5

-

10

1.0

-

µA

V

CE

Input low voltage

I

-

CE1

Input high voltage

RPM SELECT

I

3.5

-

V

CEH1

Input current

I

-

5

-

10

1.0

-

µA

V

RPM

Input low voltage

V

-

RPM1

RPMH

Input high voltage

HALL AMP

V

3.5

-

V

Input resistance ^note

Common mode input voltage range ^note

Differential input voltage range ^note

START-UP

RI

N

-

1

10

-

kΩ

V

2.0

100

V

COM

CC

V

-

420

mV

PP

DIF

Hall bias voltage 1

Hall bias voltage 2

Reference voltage

Bias off current

V

I =4mA, CE=L

2.3

2.7

1.7

-

2.5

2.9

2.2

5

2.7

3.1

2.7

10

V

HB1

HB2

H

V

I =10mA, CE=L

H

Vref

I =1mA, CE=L

O

V

I

V =7V, CE=H

H

µA

HOFF

OUTPUT AMP

Leakage current

I

-

0.5

1.0

1.3

1

mA

V

CER

Saturation voltage 1

Saturation voltage 2

BUFFER & CONTROL AMP

Voltage gain 1 ^note

Reference voltage 1 ^note

Reference voltage 2 ^note

Vsat1

Vsat2

I =0.35A

1.2

1.8

O

I =0.7A

O

V

G

-

−11

-

dB

V

CT1

Vref1

Vref2

Current limiter voltage 0.205 0.208 0.210

Control begin voltage 0.69

-

V

Notes:

Reference value

9

KA2822D

Electrical Characteristics (Continued)

(Ta=25°C, V =5V)

CC

Parameter

Symbol

Conditions

Min.

Typ.

Max. Units

CHARGE PUMP

Charge current

I

RPM=L

/ I

−15

15

0.9

-

−20

20

1.0

-

−25

25

µA

-

CP−

Discharge current

Current ratio ^note

CP+

I

1.1

50

R

CP+ CP−

Off current

Clamp voltage ^note

I

V

=0.63V

-

nA

V

OFF

CP

V

-

1.3

1.5

CLP

FG AMP

Output DC voltage ^note

Voltage gain 2

V

-

1.0

24

2.0

-

1.3

1.6

44

V

FG

G

34

-

dB

FG

Input voltage range ^note

Noise margin 1 ^note

Noise margin 2 ^note

SPEED CONTROL

Count range 1^note

Count range 2 ^note

Operating freq.

V

20

mV

IN

P-P

N

Differential noise

-

0.5

mV

V

D

C

N

Common mode noise

-

P-P

N1

N2

RPM=L

RPM=H

-

1666.5

1388.5

1.0

-

F

1.1

MHz

D

BURST ADJUSTMENT

Input current

I

-

RPM=L

-

1

2

µA

V

BI

Threshold voltage 1

Threshold voltage 2

PULSE WIDTH ADJUSMENT

Ct2 charge current

Threshold voltage 3

INDEX OUTPUT

V

1.2

1.05

1.45

1.3

1.7

1.55

TH1

TH2

RPM=H

V

I

-

−19

−25

−36

µA

CT2

V

0.9

1.1

1.3

V

TH3

Output leakage current ^note

I

-

1

2

µA

OH

Output low voltage

V

I =1mA

O

0.2

0.4

V

O1

Notes:

Reference value

10

KA2822D

Application Information

1. CHIP ENABLE

This function turns on or off all blocks by low or high signal.

2. U, V AND W PHASE OUTPUT AMP

These ampilifiers drives three output phases - U, V, and W which have 120(degree) phase differences with each other. The

three phase waveforms are made with the two hall sensor signals by synthesizing the third phase signal.

3. SPEED CONTROL PART

This function compares the real motor rotation frequency with the 300 or 360Hz pulse divided from 1MHz clock pulse for

removing speed error when motor is on and speed error is detected by PLL.

The speed error sent to charge pump part which repeats charge and discharge controls the output current of the output amp to

keep a stable rotation.

11

KA2822D

Typical Performance Characteristics

I

CC

15.0

[mA]

1.5

/div.

0

0.8/div.

8.0[V]

V

CC

vs. I

1. V

CC

Vref

Index pulse width

3.0

[V]

8.0

[ms]

0.3

/div.

1.0

/div.

0

8.0[V]

4.2

4.5

5.0

5.5

6.0

6.5

7.0

7.5

0.8/div.

8.0[V]

V

CC

vs. Vref (Pin4)

CC

vs. Index pulse width

V

CC

12

KA2822D

Typical Application Circuits

+5V

220nF

1

SW1

DISK_IN

W_P

100

H_D

100nF

SW2

U PHASE OUTPUT

V PHASE OUTPUT

W PHASE OUTPUT

U

V

U INPUT(+)

HU

19

18

24

16

17

26

23

LED

U INPUT(−)

22

21

U INPUT(+)

U INPUT(−)

HALL BIAS

AGC

W

HV

+5V

PHASE COMPENSATION

1.8M

25

27

2

15

10k

INDEX OUTPUT

CE

6

3

KA2822D

CE

7

OSC INPUT

100nF

FG_INPUT(+)

FG_INPUT(-)

28

1

47nF

CHARGE PUMP OUTPUT

12

47nF

FG ZERO CROSS

9

100nF

10nF

4

5

56k

VOLTAGE REGULATOR

INDEX BURST

330k

VR

13 11

8

47nF

47k

1MHz

RPM_SEL

INDEX

13

28-SSOPH-375

0.05

0.002

MIN

2.20 ±0.20

0.087 ±0.008

#1

#28

#14

#15

10.00 ±0.30

0.394 ±0.012

2.50

0.098

MAX

7.50 ±0.20

0.295 ±0.008

9.53

0.375

0.80 ±0.20

0.031 ±0.008

TRADEMARKS

The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is

not intended to be an exhaustive list of all such trademarks.

QFET™

QS™

QT Optoelectronics™

VCX™

FASTr™

ACEx™

GlobalOptoisolator™

GTO™

HiSeC™

Bottomless™

CoolFET™

CROSSVOLT™

DOME™

E²CMOS^TM

EnSigna^TM

FACT™

Quiet Series™

SuperSOT™-3

SuperSOT™-6

SuperSOT™-8

SyncFET™

TinyLogic™

UHC™

ISOPLANAR™

MICROWIRE™

OPTOLOGIC™

OPTOPLANAR™

POP™

FACT Quiet Series™

FAST^®

PowerTrench^®

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER

NOTICE TOANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD

DOES NOTASSUMEANY LIABILITYARISING OUT OF THEAPPLICATION OR USE OFANY PRODUCT

OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT

RIGHTS, NOR THE RIGHTS OF OTHERS.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT

DEVICES OR SYSTEMS WITHOUTTHE EXPRESS WRITTENAPPROVALOF FAIRCHILD SEMICONDUCTOR CORPORATION.

As used herein:

1. Life support devices or systems are devices or

systems which, (a) are intended for surgical implant into

the body, or (b) support or sustain life, or (c) whose

failure to perform when properly used in accordance

with instructions for use provided in the labeling, can be

reasonably expected to result in significant injury to the

user.

2. A critical component is any component of a life

support device or system whose failure to perform can

be reasonably expected to cause the failure of the life

support device or system, or to affect its safety or

effectiveness.

PRODUCT STATUS DEFINITIONS

Definition of Terms

Datasheet Identification

Product Status

Definition

Advance Information

Formative or

In Design

This datasheet contains the design specifications for

product development. Specifications may change in

any manner without notice.

Preliminary

First Production

This datasheet contains preliminary data, and

supplementary data will be published at a later date.

Fairchild Semiconductor reserves the right to make

changes at any time without notice in order to improve

design.

No Identification Needed

Full Production

This datasheet contains final specifications. Fairchild

Semiconductor reserves the right to make changes at

any time without notice in order to improve design.

Obsolete

Not In Production

This datasheet contains specifications on a product

that has been discontinued by Fairchild semiconductor.

The datasheet is printed for reference information only.

Rev. F1


型号：	KA2822BDTF
厂家：	FAIRCHILD SEMICONDUCTOR
描述：	3-Phase BLDC Motor Driver 三相BLDC电机驱动器驱动器运动控制电子器件信号电路光电二极管电动机控制电机
文件：	总15页 (文件大小：190K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

KA2822BDTF [FAIRCHILD]

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