Datasheet KA2822DTF, KA2822D, KA2822BDTF, KA2822BD Datasheet (Fairchild Semiconductor)

KA2822D

3-Phase BLDC Motor Driver

www.fairchildsemi.com

Features

• 3-phase, full-wave, linear BLDC motor driver with 2 hall sensors

• 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

• Built-in TSD (Thermal shutdown)

• Low saturation voltage

• Digital input: TTL, 5V CMOS compatible

• Built-in current-mode control circuit (I

PEAK

Description

The KA2822D is a monolithic integrated circuit, and suitable for the three-phase spindle motor driver of FDD system.

28-SSOPH-375

: 1A)

Typical Application

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

• Other 3-phase BLDC motor

Ordering Information

Device Package Operating Temp.

KA2822D 28-SSOPH-375 0 ~ 75°C

KA2822DTF 28-SSOPH-375 0 ~ 75°C

KA2822BD 28-SSOPH-375 0 ~ 75°C

KA2822BDTF 28-SSOPH-375 0 ~ 75°C

Rev. 1.0.1

May. 2000.

1

KA2822D

Pin Assignments

FG INPUT(−)

AGC

INDEX PULSE WIDTH

VOLTAGE REG

INDEX BURST

INDEX OUTPUT

CE

SIGNAL GROUND

FG ZERO CROSS

FG OUTPUT

RPM SELECT

CHARGE PUMP OUTPUT

OSC INPUT

NC

1

2 3

4

5

6 7

28

27 26

25

24

23

22

KA2822D

8

9 10

11

12

13

14

21

20 19

18

17

16

15

FG INPUT(+)

HALL BIAS

CURRENT DETECTION1

V INPUT(−)

V INPUT(+)

U PHASE OUTPUT

V PHASE OUTPUT

FINFIN

W PHASE OUTPUT

NC

U INPUT(+)

U INPUT(−)

CURRENT DETECTION2

V

CC

PHASE COMPENSATION

2

Pin Definitions

Pin Number Pin Name I/O Pin Function Description

1 FG_INPUT I Negative input pin FG signal amp. 2 AGC I Automatic gain control input pin 3 INDEX PULSE WIDTH O Index pulse width detection (1.1V) pin 4 VOLTAGE REGULATOR O Voltage (2.2V) generator output pin 5 INDEX BURST O Index pulse width detection (1.4V) pin 6 INDEX OUTPUT O Index pulse output pin 7 CE I Chip enable (Active low) 8 SIGNAL GROUND - Signal ground

9 FG ZERO CROSS O FG signal zero cross detection pin 10 FG OUTPUT O FG signal output pin 11 RPM SELECT I RPM selection pin (L: 300, H: 360rpm) 12 CHARGE PUMP OUTPUT O Charge pump output pin 13 OSC INPUT I 1MHz oscillation input pin 14 NC - No connection 15 PHASE COMPENSATION I Phase compensation cap. connection pin 16 V 17 CURRENT DETECTION2 I Over current detection pin 18 U INPUT (−) I Negative input pin of U phase amp 19 U INPUT (+) I Positive input pin of U phase amp 20 NC - No connection 21 W PHASE OUTPUT O W phase output pin 22 V PHASE OUTPUT O V phase output pin 23 U PHASE OUTPUT O U phase output pin 24 U INPUT (+) I Positive input pin of V phase amp 25 V INPUT (−) I Negative input pin of V phase amp 26 CURRENT DETECTION1 I Over current detection pin 27 HALL BIAS I Hall sensor bias input pin 28 FG INPUT (+) I Positive input pin of FG signal amp

FIN POWER GROUND - Power ground

CC

- 5V power supply pin

KA2822D

3

KA2822D

Internal Block Diagram

U INPUT (+)

U INPUT(−)

V INPUT (+)

V INPUT(−)

AGC

HALL BIAS

CE

FG INPUT(+)

FG INPUT(−)

FG OUTPUT

Output Control

CURRENT DETECTION2

V

CC

16 17 26

19

18

24

25

2

27

7

28

1

10

+ U_AMP

−

+ V_AMP

−

AGC

Start-up

CE

FG_AMP

+

−

1.3V

Hall Zero-cross

FG Zero-cross

CURRENT DETECTION1

U_OUT

V_OUT

W_OUT

CON_AMP

BUF_AMP

TSD

23

U PHASE OUTPUT

22

U PHASE OUTPUT

21

W PHASE OUTPUT

−

+

0.24V 15

PHASE COMPENSATION

−

0.69V

+

FG ZERO

CROSS

VOLTAGE REG.

INDEX BURST

OSC INPUT

9

Timing Detectpr

4

5

13

2.2V Rpm_select

OSC

NC RPM SIGNAL NCFIN

11_divider

Burst_time Circuit

Speed Control

SELECT GROUND

Pulse_width Adjustment

Charge Pump

6

INDEX OUTPUT

3

INDEX PULSE WIDTH

12

CHARGE PUMP OUTPUT

2081114

4

Equivalent Circuits

vcc

U_amp, V_ amp input U, V, W drive output and current detection 1, 2

vcc

5k

Ω

vcc

KA2822D

(17Pin, 26Pin)

V

CC

(16Pin)

(19Pin, 25Pin)

vcc

2.5k

Ω

2.5k

Ω

(18Pin,

U (23Pin)

24Pin)

40k

Ω

40k

Ω

FG input and FG output OSC input

vcc

0.5k

25k

0.5k

Ω

(28Pin)

vcc

(13Pin)

vcc

(10Pin)

CE input Hall bias input and voltage regulator output

vcc

0.1k

V

40k

(22Pin)

Ω

W (21Pin)

vcc

Ω

5k

Ω

50pF

1k

Ω

CE

vcc

(27Pin)

3k

Ω

vcc

2.9V

vcc

(4Pin)

2.2V

5

KA2822D

vcc

Equivalent Circuits (Continued)

Index pulse width detection output Phase compensation and current detection 1, 2

vcc

(15Pin)

(3Pin)

2k

Ω

2k

Ω

RPM select input AGC input

vcc

AGC (2Pin)

(11Pin)

6k

Ω

vcc

To U amp, V amp (Current control)

(17Pin, 26Pin)

(6Pin)

Index output Index burst output

vcc

1.4V

vcc

2k

Ω

(5Pin)

6

Equivalent Circuits (Continued)

KA2822D

FG zero cross output

(9Pin)

vcc

Charge pump output

vcc

to IIL Circuit

Charge pump

(12Pin)

vcc

Buffer amp

7

KA2822D

g

Absolute Maximum Rating (Ta=25°C)

Parameter Symbol Value Unit

Maximum power supply volta Maximum input volta

eV

Maximum output current I

eV

CCMAX

INMAX

OMAX

Normal output current I Power dissipation P Operatin

temperature T

Junction temperture T

e temperature T

Stora

O

D A

J

STG

7.0 V

0 ~ V

CC

1A

0.7 A

1.5 W

0 ~ 75

150

−

55 ~ +125

Power Dissipation Curve

2.0

V

°

C

°

C

°

C

Power Dissipation : PD[W]

1.5

1.0

0.5

0

0 25 50 75 100 125

Ambient temperature, Ta [°C]

150 175

Power dissipation decreases in the rate of 13.5mV / °C when mounted on 50mm × 50mm × 1mm PCB (Phen olic resin material) and used above Ta=25°C.

Recommended Operating Conditions (Ta=25°C)

Parameter Symbol Min. Typ. Max Unit

Supply volta Supply volta

eV e in logic part V

Ambient operatin

temperature rangeTa0-+70

CC1

, V

CC3

CC2

10.8 12.0 13.2 V

4.5 5.0 5.5 V

°

C

Temperature Characteristic

Parameter Symbol Min. Typ. Max Unit

Thermal shutdown temperature

NOTE:

Reference value

note

TSD 125 150 -

°

C

8

Electrical Characteristics

g

ge g

g

(Ta=25°C, VCC=5V)

Parameter Symbol Conditions Min. Typ. Max. Units

SUPPLY CURRENT

Supply current 1 I

Supply current 2 I

CHIP ENABLE

Input current I Input low volta Input hi

RPM SELECT

Input current I Input low volta Input hi

HALL AMP

Input resistance Common mode input volta Differential input volta

START-UP

Hall bias volta Hall bias volta Reference volta Bias off current I

OUTPUT AMP

Leaka

e current I Saturation volta Saturation volta

BUFFER & CONTROL AMP

Volta Reference volta Reference volta

eI

h voltageI

eV

h voltageV

note

e range

note

e 1 V e 2 V

eVrefI

e 1 Vsat1 IO=0.35A - 1.0 1.2 V e 2 Vsat2 IO=0.7A - 1.3 1.8 V

note

ain 1

note

e 1

note

e 2

KA2822D

CCO

CC

CE

CE1

CEH1

RPM RPM1

RPMH

RI

V

COM

V

DIF

HB1 HB2

HOFF

CER

G

CT1

VCC=6.5V

=H, RPM=L

CE VCC=6.5V, CE=L - 15 23 mA

CE=0~5V - 5 10

- - - 1.0 V

- 3.5 - - V

CE=0~5V - 5 10

- - - 1.0 V

- 3.5 - - V

N

-110-k

-2.0-V

- 100 - 420 mV

IH=4mA, CE=L 2.3 2.5 2.7 V IH=10mA, CE=L 2.7 2.9 3.1 V

=1mA, CE=L 1.7 2.2 2.7 V

O

VH=7V, CE=H - 5 10

--0.51mA

--

- 1.0 2.0 mA

CC

−

11 - dB Vref1 Current limiter voltage 0.205 0.208 0.210 V Vref2 Control begin voltage - 0.69 - V

µ

A

µ

A

Ω

V

PP

µ

A

Notes:

Reference value

9

KA2822D

g

ge g

g

Electrical Characteristics (Continued)

(Ta=25°C, VCC=5V)

Parameter Symbol Conditions Min. Typ. Max. Units

CHARGE PUMP

e current I

Char Dischar Current ratio

e current I

note

Off current I

note

Clamp volta

e

FG AMP

note

Output DC volta Volta

ain 2 G Input volta Noise margin 1 Noise margin 2

e

e range

note note

note

SPEED CONTROL

note

Count ran Count ran Operatin

e 1

note

e 2

freq. F

BURST ADJUSTMENT

Input current I Threshold volta Threshold volta

e 1 V e 2 V

PULSE WIDTH ADJUSMENT

Ct2 char Threshold volta

e current I

e 3 V

INDEX OUTPUT

Output leaka

e current

Output low volta

note

eV

CP− CP+

I

R

OFF

V

CLP

V

FG FG

V

IN

N

D

N

C

N1 RPM=L - 1666.5 - N2 RPM=H - 1388.5 - -

D

BI TH1 TH2

CT2

TH3

I

OH

O1

RPM=L

−

15 RPM=L 15 20 25 I

CP+

/ I

CP−

0.9 1.0 1.1 -

−

20

−

25

µ µ

VCP=0.63V - - 50 nA

- - 1.3 1.5 V

- 1.0 1.3 1.6 V

-243444dB

- 2.0 - 20 mV Differential noise - - 0.5 mV Common mode noise - - 0.5 V

P-P

- - 1.0 1.1 MHz

--12

µ

RPM=L 1.2 1.45 1.7 V RPM=H 1.05 1.3 1.55 V

-

−

19

−

25

−

36

µ

- 0.9 1.1 1.3 V

--12

µ

IO=1mA - 0.2 0.4 V

A A

P-P P-P

A

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 Cha ra cteristics

I

CC

15.0 [mA]

1.5 /div.

0

1. VCC vs. I

0.8/div.

V

CC

8.0[V]

CC

Vref

3.0 [V]

0.3 /div.

Index pulse width

8.0 [ms]

1.0 /div.

0

0.8/div.

V

CC

8.0[V]

0

4.2

4.5 5.0 5.5 6.0 6.5 7 .0 7.5

V

CC

8.0[V]

VCC vs. Vref (Pin4) VCC vs. Index pulse width

12

Typical Application Circuits

KA2822D

+5V

220nF

DISK_IN

W_P

H_D

LED

CE

47nF

SW1

SW2

47nF

HU

HV

56k

VOLTAGE REGULATOR

VR

100

U INPUT(+) U INPUT(−)

HALL BIAS

AGC

CE

FG_INPUT(+)

FG_INPUT(-)

FG ZERO CROSS

INDEX BURST

47nF

CC

V

19 18 24

25 27 2 7 28 1

9

4 5

13 11 8

CURRENT DETECTION2

16 17

26

KA2822D

1

U PHASE OUTPUT

CURRENT DETECTION1

23

V PHASE OUTPUT

22

W PHASE OUTPUT

21

PHASE COMPENSATION

15

INDEX OUTPUT

6

OSC INPUT

3

CHARGE PUMP OUTPUT

12

1

100nF

1.8M

10nF

U

V

W

+5V

10k

100nF

330k

1MHz

RPM_SEL

INDEX

47k

13

OSC INPUT

RPM SELECT

SIGNAL GROUND

28-SSOPH-375

0.05

MIN

0.002

2.20 ±0.20

0.087 ±0.008

0.010

+

-0.002

0.004

#14

0.25

+

-0.05

0.10

#1

10.00 ±0.30

0.394 ±0.012

7.50 ±0.20

0.295 ±0.008

#28

#15

MAX

18.80

2.50

0.098

0.740

MAX

18.40 ±0.20

0.724 ±0.008

1.20

0.047

()

0.40 ±0.10

0.016 ±0.004

0.80

0.031

0.80

±0.20

0.031 ±0.008

9.53

0.375

0~8°

MAX0.10

MAX0.004

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.

ACEx™ Bottomless™ CoolFET™ CROSSVOLT™ DOME™ E2CMOS EnSigna

TM

FACT™ FACT Quiet Series™

®

FAST

FASTr™ GlobalOptoisolator™ GTO™ HiSeC™ ISOPLANAR™ MICROWIRE™ OPTOLOGIC™ OPTOPLANAR™ POP™ PowerTrench

®

QFET™ QS™ QT Optoelectronics™

Quiet Series™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8 SyncFET™ TinyLogic™ UHC™

VCX™

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY 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 WITHOUT THE EXPRESS WRITTEN APPROVAL OF 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

Preliminary

No Identification Needed

Obsolete

Formative or In Design

First Production

Full Production

Not In Production

This datasheet contains the design specifications for product development. Specifications may change in any manner without notice.

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.

This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design.

This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only.

Rev. F1