SANYO LB8109M Datasheet

Ordering number: EN5233

Monolithic Digital IC

LB8109M

Actuator Driver for Portable CD Players

Overview

The LB8109M is an actuator driver IC designed for portable CD players that operate at 2.4 V (two Ni-Cd batteries) or 3.0 V (two dry cells).

Package Dimensions

unit : mm

3148-QIP44MA

[LB8109M]

SANYO : QIP44MA

Functions and Features

H bridge drivers (output dynamic range maximum is about 2 V) on chip for four channels to drive each CD actuator (the focus coil, the tracking coil, the spindle motor, and the sled motor).

Step-up circuit (voltage to be set by an external resistor) on chip that is used to apply voltage to the CD DSP, ASP and microcontroller. Center-tap coil for step-up circuit makes it possible to supply the driver control voltage. (However, the drive Tr, L, C, and Di are all external.)

Oscillator circuits for each converter on chip. (C and R are external.)

Four-channel driver control output is divided into two groups (the focus/tracking group and the spindle/sled group) for minimum loss at double-speed play. Higher operating voltage in each group is converted to power supply of each 2ch H bridge driver by PMW conversion. (However, the PWM PNP-Tr, NPN-Tr, L, C, and Di are all external.)

Sled motor driving mode is switchable between step drive mode for lower power dissipation, and normal V-type drive mode. (The other three channels are fixed to V-type.)

In the spindle motor drive circuit, the control gain can be doubled for double-speed play. (Switching port provided.)

PWM step-down circuit for external power operates when external power (8 V or more) is supplied. In this function, external power is converted to V In play mode, step-up voltage for DSP has to be set lower than V V

So step-down voltage (V (However, the PWM PNP-Tr, NPN-Tr, L, C, and Di are all external.)

Battery pulse charging function on chip. (However, the drive NPN-Tr, and the current feedback C and R are external.)

Having one 358-type OP amplifier on chip, it is suitable for a variety of applications. (Power supply: VCD)

The system can be started up and stopped by outputs from the microcontroller.

Actuator muting function on chip (for all four channels simultaneously).

Thermal shutdown circuit on chip.

) setting of two types is possible with two pairs of external resistor. (Switching port is provided.)

power supply, and two type voltage setting is possible.

, but in charging the battery, it has to be set higher than

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13096HA (II) No.5233-1/9

LB8109M

Specifications

Absolute Maximum Ratings atTa=25°C

Parameter Symbol Conditions Ratings Unit Maximum supply voltage V V

pin input voltage VCDmax 10 V

H bridge output current I Allowable power dissipation Pd max Independant IC 700 mW Operating temperature Topr –20 to +75 Storage temperature Tstg –55 to +150

Allowable Operating Ranges at Ta = 25°C

Parameter Symbol Conditions Ratings Unit Supply voltage V V

pin input voltage V

drop setting voltage when

external voltage input is applied

Electrical Characteristics atTa=25°C, VCC=3V,VCD=4V

max 7V

max Maximum per channel is 400 mA. 800 mA

OUT

CC CD

CC(EXT)

1.6 to 5.0 V

3.6 to 9.0 V

3.0 to 5.0 V

Parameter Symbol Conditions min typ max Unit

[Power Supply Block]

Standby current drain I V

no-signal current drain I

CCO

CC CD

S/S = [H], the total of VCCand V

S/S = [L], VCCline only 7.0 10.0 mA S/S = [L], with no driver input 5.0 8.0 mA

[Externally set step-up circuit]

ASP drive output current I Reference voltage of step-up

circuit

pin input bias current I

ASP

UPBASE pin saturation voltage

Load regulation R Line regulation R Minimum off duty D

O ASPDRVVASP

ref ASP

B V ASP

O UPBASEIO

LD ASP LN ASP

min ASP

= 1 V 2.2 2.8 3.4 mA Determined at ASP drive pin 1.23 1.28 1.33 V V

= 1.5 V 200 nA

ASP

= 1 mA 0.2 V

= 3.5 V, L = 30 µH, C = 220 µF 1000 mV/A

ASP

= 3.5 V, L = 30 µH, C = 220 µF 100 mV/V

ASP

[S/S Pin Function]

S/S start voltage V S/S off voltage V

ON VCC–1.0 V

OFF VCC–0.5 V

[H Bridge Output Block, PWM Block]

Output saturation voltage V V

pin maximum output

OUT

voltage

PWM applied offset voltage V

H sat

OUT

PWMOFF

IO= 200 mA, TOP + BOTTOM 0.30 0.45 V

max 2.25 V

At mute state (each output = 0) 0.23 0.26 0.29 V

DNB – 1,2 pins output current Io DNB1,2 V Load regulation R Line regulation R

LDVOUTVOUT LNVOUTVOUT

= max, L = 30 µH 1000 mV/A = max, L = 30 µH 100 mV/V

[Drive Control Block]

CH1 to 4 input voltage range V ASP REF input voltage range V Input bias current I Input offset voltage V

IN1–4 ASPR

BIN off IN

CH1,2,4 transfer gain G124 CH3 L side transfer gain G3L CH3 H side transfer gain G3H

Each VIN=V V

ASP REF

RL=10Ω 7.1 8.3 9.5 dB

RL=10Ω 13.6 14.8 16.0 dB

ASP REF

= 2 V –30 +30 mV

= 2 V 2.0 µA

0.5 VCD–0.5 V

1.2 VCD–1.3 V

20 µA

20 %

/600 A

OUT

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LB8109M

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Parameter Symbol Conditions min typ max Unit

Negative/positive transfer gain difference

Input dead zone voltage range V G-SELECT pin low-gain side

selection voltage G-SELECT pin high-gain side

selection voltage

[SLED Drive Circuit]

SL REF pin input voltage range

SL REF pin input bias current I Positive side setting offset

voltage between IN4 and SL REF

Dual side step width difference voltage

SL MODE pin high voltage V SL MODE pin low voltage V

[Muting Block]

Mute on voltage V Mute off voltage V

[OP Amplifier Block]

Input offset voltage V Input bias current for each

input Common-mode input voltage

range Open-loop voltage gain G

[External Voltage Input Block]

Minimum operating input voltage when external voltage input is applied

EXTDRV pin output current I VZ pin voltage V VZ pin inflow current I V

EXT,VEXT

Input bias current V

EXT,VEXT

Step-up circuit reference

-CHG pin

voltage EXTBASE pin saturation

voltage

[OSC Block]

OSCPWR pin output voltage V Maximum oscillation frequency F Input bias current I

[Pulse Charging Function]

Internal reference voltage V CHG-ON pin ON voltage V CHG-ON Pin OFF voltage V CHG-MON pin input bias

current CHGDRV pin output current I

[TSD Block]

Operating temperature T Temperature hysteresis width ∆T

Note 1: For parameters which have an entry of ‘‘design target value’’ in the ‘‘Conditions’’ column, no measurements are made.

∆G

GSELL-TH

GSELH-TH

SL REF

B SL REFVSL REF

off SL REFVSL REF

SL DIFF

H SL MODE

L SL MODE

ON MUTE

OFF MUTE

OFF OP

BOP

CM OP

VOP

I EXT

O EXT DRVVEXT

B EXTCHG

B EXT

Vref

E-CHG

Vref

EXT

EXTBASEIO

OSCPWR

OSC max

B OSC

CHG REF

CHG-ON

CHG-OFF

B CHG MONVCHG MON

O CHG DRVVCHG MON

TSD

RL=10Ω –1.0 0 +1.0 dB

RL=10Ω, output voltage difference 5 mV or less

SL REF

OPin(+) = OPin(–)=2V 200 nA

atf=10kHz 31 34 37 dB

RIN=1kΩ 8.0 V

= 1 V (CHG-ON [L]) 170 210 250 µA V

=10V,RIN=1kΩ 6.4 6.9 7.4 V

EXT

= 1.5 V

EXT

EXT-CHG

Both determined at EXTDRV pin EXT-CHG side: CHG-ON [H]

= 1 mA 0.2 V

= 0 V –2.0 µA

OSC

Design target value, Note 1 180 Design target value, Note 1 20

030mV

2.0 V

1.0 V

+0.1 VCD–1.0 V

ASP REF

= 2 V 200 nA

= 2.3 V, V

ASP REF

= 2 V –20 +20 mV

= 2 V –25 +25 mV

2.0 V

1.0 V

2.0 V

1.0 V

–5 +5 mV

VCD–1.5 V

20 mA

= 1.5 V (CHG-ON [H])

200 nA

1.23 1.28 1.33 V

VCC–0.15 V

100 kHz

0.32 0.35 0.38 V

2.0 V

1.0 V = 0.3 V 200 nA = 0 V 2.4 3.0 3.6 mA

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