HIT HA13557AFH Datasheet

HA13557AFH

Combo (Spindle & VCM) Driver

ADE-207-234A (Z)

2nd. Edition

July 1997

Description

This COMBO Driver for HDD application consists of Sensorless Spindle Driver and BTL type VCM
Driver.

Bipolar Process is applied and a “Soft Switching Circuit” for less commutation noise and a “Booster
Circuit” for smaller Saturation Voltage of Output Transistor are also implemented.

Features

• Soft Switching Driver

• Small Surface Mount Package: FP-48T (QFP48 Pin)

• Low thermal resistance: 30°C/W with 4 layer multi glass-epoxy board

• Low output saturation voltage
 Spindle 1.44 V Typ (@1.8 A)
 VCM 1.0 V Typ (@1.0 A)

Functions

• 2.2 A Max/3-phase motor driver

• 1.5 A Max BTL VCM Driver

• Auto retract

• Soft Switching Matrix

• Start up circuit

• Booster

• Speed Discriminator

• Internal Protector (OTSD, LVI)

• POR

• Power monitor

HA13557AFH

Pin Arrangement

)

+

TAB

GND

VBST
VCMP
VCMN

BC2
BC1

GND

RS

RETON

RETPOW

Vpsv

LVI2

48 47 46 45 44 43 42 41 40 39 3738

1
2
3
4
5
6

GND

TAB

7

GND

8

W

9

RNF

CT

10
11
12

V

13 14 15 16 17 18 19 20 21 22 23 24

U

C-PUMP

R1

CLREF

Vpss

GND

TAB

GND

PCOMP

*NC : No internal connection

Please note that there is no isolation check between pin 34 and pin 35
at the testing of this IC.

(Top View)

OPIN(–)

VCTL

SS

V

LVI1

RESINH

OPIN(

COMM

DELAY

VREF1

36

COMPOUT

35

NC*

34

NC*

33

GAIN

32

VCMENAB

31

GND

TAB

30

GND

29

POR

28

SPNENAB

27

READY

26

CLOCK

25

CNTSEL

POLSEL

2

HA13557AFH

Pin Description

Pin Number Pin Name Function

1 VBST Boosted voltage output to realize the low output saturation voltage
2 VCMP Output terminal on VCM driver
3 VCMN Output terminal on VCM driver
4 BC2 To be attached the external capacitor for booster circuitry
5 BC1 ditto
6, TAB, 7 GND Ground pins
8 W W phase output terminal on spindle motor driver
9 RNF Sensing input for output current on spindle motor driver
10 PCOMP To be attached the external capacitor for phase compensation of spindle

motor driver
11 CT To be attached the center tap of the spindle motor for B-EMF sensing
12 V V phase output terminal on spindle motor driver
13 U U phase output terminal on spindle motor driver
14 C-PUMP To be attached the external integral constants for speed control of spindle

motor
15 CLREF Reference voltage input for current limiter of spindle motor driver
16 R1 To be attached the external resistor for setting up the oscillation frequency of

start-up circuitry and the gain of speed control loop of spindle motor driver
17 Vpss Power supply for spindle motor driver
18, TAB, 19 GND Ground pins
20 V
21 LVI1 Sensing input for power monitor circuitry
22 DELAY To be attached the external capacitor to generate the delay time for power on

23 COMM To be attached the external capacitor for setting up the oscillation frequency
24 POLSEL To be selected the input status corresponding to the pole number of spindle

25 CNTSEL To select the count Number of Speed Discriminator
26 CLOCK Master clock input for this IC
27 READY Output of speed lock detector for spindle motor
28 SPNENAB To select the status of spindle motor driver
29 POR Output of power on reset signal for HDD system
30, TAB, 31 GND Ground pins
32 VCMENAB To select the status of VCM driver
33 GAIN To select the Transfer conductance gm of VCM driver

SS

Power supply for small signal block

reset signal

motor

3

HA13557AFH

Pin Description (cont)

Pin Number Pin Name Function

34 NC No function
35 NC No function
36 COMPOUT Comparator output to detect the direction of output current on VCM driver
37 VREF1 Regulated voltage output to be used as reference of peripheral ICs
38 RESINH Used for inhibiting the restart function of the spindle motor driver after power

down
39 OPIN (+) Non inverted input of OP.Amp. to be used for filtering the signal on PWMOUT
40 VCTL OP.Amp. output, this signal is used as control signal for VCM driver output
41 OPIN (–) Inverted input of OP.Amp. to be used for filtering the signal on PWMOUT
42, TAB, 43 GND Ground pins
44 LVI2 Sensing input for power monitor circuitry
45 Vpsv Power supply for VCM driver
46 RETPOW Power supply for retract circuitry
47 RETON To be attached the base terminal of external transistor for retracting
48 RS Sensing input for output current on VCM driver

4

Block Diagram

HA13557AFH

RESINH

COMM

C103

C-PUMP

C2

C1

CLREF

R1b

SPNENAB

POLSEL
CLOCK

(5MHz Typ)

CNTSEL

READY

VCTL

OPIN(–)
OPIN(+)

Vref1

GAIN

VCM ENAB

C104

C105

R1

R1a

NC
NC

BC1

BC2

V

VSS (+5V)

V

SS

20 17

38

23

C102

B-EMF

AMP.

START-UP
CIRCUIT

SOFT
SWITCHING
MATRIX

COMMUTATION

LOGIC

14

15

CHARGE

PUMP

CURRENT
CONTROL

16
28
24

(D1)

SPEED DISCRI.

26

1/32

(CNT)

25
27

SPEED
READY

V

BST

40

–

41
39
37

34
35

+

OPAMP.

Vref1
(=4.6V)

OTSD

+

VCM

DRIVER

–

33
32

5
4
1

BST

BOOSTER

Vss
(+5V)

V

BST

Vss

21 44 22

LVI1

R101

POWER
MONITOR

LVI2

R103

Vps

R102 R104

Vps
(+12V)

POR
Delay

DELAY

C106

V

BST

Vpss

SPINDLE
DRIVER

RETRACT
DRIVER

P

N

COMPARATOR

Vps(+12V)

U

V

W

PCOMP

Vpsv

RETPOW

RETON

VCMP

VCMN

–
+

GND

TAB
6, 7, 18, 19, 30,
31, 42, 43

C101

CT

11

13

U

12

V

8

W

9

10
45

46

47

2

3

48

RS

COMP

36

OUT

R105

29

POR
(L:RESET)

D2

D3

D4

R

C110

C111

R112

Qret2

C
R

NF

Qret1

C112

X
X

Vss(+5V)

C109

R113

R109

R

S

R

L

R111

R110

D1

5

HA13557AFH

Truth Table

Table 1 Truth Table (1)

SPNENAB Spindle Driver

HON
Open Cut off
L Braking

Table 2 Truth Table (2)

VCMENAB VCM Driver

HON
L Cut off

Table 3 Truth Table (3)

OTSD Spindle Driver VCM Driver Retract Driver POR

not Active See table 1 See table 2 Cut off X
Active Cut off Cut off ON L

Table 4 Truth Table (4)

POLSEL (D1) Comment

H — Test Mode
Open 1/12 for 8 poles motor
L 1/18 for 12 poles motor

Table 5 Truth Table (5)

Rotation Speed

CNTSEL CNT

H 2605 3,600 rpm
Open 2084 4,500 rpm
L 1736 5,400 rpm

(at CLOCK = 5 MHz)

6

HA13557AFH

Table 6 Truth Table (6)

RESINH Spindle Driver

H Inhibiting the restart after power down
L Not inhibiting the restart after power down

Table 7 Truth Table (7)

GAIN VCM Driver

H High Gain Mode
L Low Gain Mode

7

HA13557AFH

Timing Chart

1. Power on reset (1)

Vsd

Vps and
V

SS

Vhys

t

POR

1.0V

MAX

0

Note: 1. How to determine the threshold voltage Vsd and the delay time t

external components table.

t

DLY

both are shown in the

DLY

t

8

2. Power on reset (2)

HA13557AFH

VPS or
V

SS

POR

Spindle
Driver

VCM
Driver

Retract
Driver

Note: 2. Retract driver need B-EMF voltage or another power supply.

ON
OFF

ON
OFF

t

por

t

por

<1µs <1µs

Retract

9