SANYO LA6503 Datasheet

Overview

The LA6503 was developed for CAV control CD-ROM
drives, and provides spindle motor driver, sled motor
driver, and sled motion/position detection circuits.

Functions and Features

• CAV control spindle motor driver
— Three-phase brushless motor driver
—IOmax = 1 A
— Built-in FG output circuit (single Hall detection

output)
— Reverse braking circuit
— Built-in start/stop circuit
— Upper side current detection for minimal loss in the

current detection resistor. Also, the voltage drop in

this resistor reduces the IC internal power

dissipation.
— Built-in thermal shutdown circuit

• Sled motor driver
— One built-in BTL driver channel
—IOmax = 1 A
— Wide dynamic range
— Built-in level shifting circuit
— Muting (output on/off) circuit
— Built-in thermal shutdown circuit

• Sled motion/position detection circuit
— Circuit that provides a pulse output corresponding to

sled motion and position

— This circuit emits 96 pulses for each rotation from

a 24-pole magnet and 90° phase difference Hall
element motors, and thus detects the distance
moved. It also provides two 48-pulse outputs with
differing phases such that the motion direction can
be detected from the phase difference between those
signals.

• Hall bias power supply
— Generates the Hall element 3-V bias voltage.
—IOmax = 30 mA, typical

Package Dimensions

unit: mm

3219-QFP34H-C

Monolithic Linear IC

31398HA (OT) No. 5791-1/8

SANYO: QFP34H-C

[LA6503]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

CD-ROM Drive Spindle Motor Driver + Sled Motor

Driver + Sled Motion/Position Detector IC

LA6503

Ordering number : EN5791

No. 5791-2/8

LA6503

Parameter Symbol Conditions Ratings Unit

Supply voltage V

CC

max 7 V

Supply voltage V

M

max 14 V

Input voltage V

C

max V

CC

V

Output current I

O

max Spindle output, sled output 1 A
Allowable power dissipation Pd max Independent IC 0.77 W
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –55 to +150 °C

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions

Ratings

Unit

min typ max

[Power Supply Current]

Current drain 1 (V

CC

) ICC1 START/STOP = MUTE = 5 V 10 20 mA

Current drain 2 (V

M

) IM1 START/STOP = MUTE = 5 V 25 50 mA

Quiescent current 1 (V

CC

) ICC2 START/STOP = MUTE = 0 V 5 10 mA

Quiescent current 2 (V

M

) IM2 START/STOP = MUTE = 0 V 1 5 mA

[Spindle Motor Block]

[Output]

Upper side saturation voltage 1 V

sourceIO

= –0.5 A 1.0 1.5 V

Lower side saturation voltage 1 V

sinkIO

= +0.5 A 0.33 0.80 V

Current limiter voltage setting V

CL

RRE= 0.43 Ω 0.32 V

[Hall Amplifier]

Common-mode input voltage range V

HCOM

1.2 VCC– 1.0 V

Input bias current V

HIB

1 µA

Minimum Hall input level V

HIN

60 mVp-p

[S/S Pin]

High-level voltage VS/SH 2.0 V

CC

V
Low-level voltage VS/SL 0.7 V
Input current IS/SI VS/S = 5 V 200 µA
Leakage current IS/SL VS/S = 0 V –30 µA

[Control]

VC pin input current I

VC

VC= V

CREF

= 2.5 V 1 5 µA

VCREF pin input current I

VCREFVC

= V

CREF

= 2.5 V 1 5 µA

Voltage gain G

VCO

∆VRF/∆V

C

0.25 Times

Rising edge threshold voltage V

CTH

V

CREF

= 2.5 V 2.35 2.65 V

Rising edge threshold voltage difference ∆V

CTHVCREF

= 2.5 V 50 150 mV

[Hall Comparator]

Input offset voltage V

HCIOFFSET

10 mV

Input hysteresis V

HCIHYS

8 mV

Output on voltage V

OU

0.3 V

Output off voltage V

OD

* 4.7 V

Output current (sink) I

sink

3 mA

Operating Characteristics at Ta = 25°C, VCC= 5 V, VM= 12 V (unless otherwise specified)

Parameter Symbol Conditions Ratings Unit

Operating supply voltage range

V

CC

4.6 to 6.0 V

V

M

4.6 to 13.0 V

Operating Conditions at Ta = 25°C

Continued on next page.

No. 5791-3/8

LA6503

Continued from preceding page.

Parameter Symbol Conditions

Ratings

Unit

min typ max

[Sled Motor Block]

Output offset voltage V

OFF

Voltage difference between outputs –50 +50 mV

Buffer input voltage range V

BIN

1.5 VCC– 1.5 V

Input voltage range V

IN

1.0 VCC– 1.5 V

Source output voltage V

O

1 RL= 8 Ω 9.5 10.1 V

Sink output voltage V

O

2 RL= 8 Ω 1.8 2.4 V
Closed-circuit voltage gain VG Bridge Amp 12 dB
Slew rate S

R

0.15 V/µs

Muting on voltage V

MUTE

The amplifier output is on when at the high level. 0.7 1.2 2.0 V

[Hall Bias (3-V Output Power Supply)]

Output voltage V

HB-OUTIOUT

= 30 mA 2.5 3.0 3.5 V

Line regulation V

HB-LINVCC

= 4.6 to 6 V, I

OUT

= 30 mA –50 +50 mV

Load regulation V

HB-LOADIOUT

= 5 to 30 mA, VCC= 5 V –200 +200 mV

Truth Table

(Spindle Motor Block)

Inputs: The “H” state is when the + input of the corresponding

phase is 0.2 V or more higher than the – input.
The “L” state is when the + input of the corresponding
phase is 0.2 V or more lower than the – input.

Note: For items marked with an asterisk (*), the Hall comparator goes to the high level when the S/S pin is off (standby mode).

Source

→ Sink

Input Control

U V W VC

1

W → V

H H L

H

V → W L

2

W → U

H L L

H

U → W L

3

V → W

L L H

H

W → V L

4

U → V

L H L

H

V → U L

5

V → U

H L H

H

U → V L

6

U → W

L H H

H

W → U L

(Sled Motor Block)

Note: “—” indicates that the amplifier output is off.

Input (V

IN

) Mute

Output

SLD-OUT+ SLD-OUT–

H

H H L
L — —

L

H L H
L — —