LB8118M 查看數據表（PDF） - SANYO -> Panasonic

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LB8118M

Actuator Driver for Portable CD Players

SANYO -> Panasonic 

LB8118M

Supplementary Explanation

1. VCD supply

The VCD line is the power supply for the driver control blocks of channels 1 to 4. The VCD line can be supplied from the

DSP or ASP step-up circuit by using a coil with center tap (as shown in the Block Diagram).

However, because the allowable operating range for VCD is 3.6 V to 9.0 V, it is recommended that in order to reduce power

dissipation, the voltage should be set to the lower range. (Even if this power supply does not affect the control performance

such as the transfer gain.)

2. Sled step drive

Stepping control in this IC for the sled actuator is as described below. Normal V-type control is selected if the SLMODE pin

is set high, but by setting this pin low step drive mode with low power dissipation can be selected. (This only affects channel

4.)

The step drive starting level is input from the SLREF pin (must be higher than ASPREF), and the positive side step start is

determined by comparing the input voltage with IN4. For the negative side, the step start is determined automatically by

setting the differential voltage between the SLREF and the ASPREF on the opposite side, and then comparing that voltage to

IN4. In other words, the control characteristics become as defined by the solid line in the diagram below. (The rise on the

positive and negative steps has no hysteresis.)

Voltage between outputs

SLREF (greater than ASPREF)

If this voltage is set, the negative side step

start is determined automatically by setting the

differential voltage betwwen SLREF and

ASPREF on the opposite side as well.

No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,

nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or

indirectly cause injury, death or property loss.

Anyone purchasing any products described or contained herein for an above-mentioned use shall:

1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors

and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and

expenses associated with such use:

2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO

ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.

Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume

production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use

or any infringements of intellectual property rights or other rights of third parties.

This catalog provides information as of December, 1997. Specifications and information herein are subject to change without notice.

No.5825-11/11

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