92706 / 62504 JO IM No.7899-1/16

LB8659FN

LB8659PL

Features

• An actuator driver for digital camera is implemented on a single chip.

(1) Supports a constant voltage for the AF H-bridge

×2 : a stepping motor (STM) ×1.

- Constant voltage drive.

- Enables 1 phase, 1-2 phase and 2-phase excitation.

- VC1 and VC2 allow the constant voltage for each channel to be set independently.

(2) Supports a constant current for the shutter H-bridge

×1 : a voice coil motor (VCM) ×1.

- Constant current drive.

- ICH allows current setting for each current carrying direction.

→Supports current suppression while the shutter is open. [applies only to LB8659FN]

- A fast charge/discharge circuit allows for stabilization of response speed of the continuous drive mode.

- Allows offsetting of the constant current rising waveform with an external C.

(The external C is not required when an offset is not performed.)

→Prevent current rising variation of coil caused by supply voltage fluctuation.

- Implements regenerative brake logic.

(3) Supports a constant voltage for the iris H-bridge

×1 : a voice coil motor (VCM) ×1.

- Constant voltage drive.

- VC4 allows the independent constant voltage to be set.

(4) Supports a constant voltage for the zoom H-bridge

×1 : a DC motor (DCM) ×1.

- Constant voltage drive.

- VC3 allows the independent constant voltage to be set.

- Built-in short brake.

(5) Supports an open collector output for the photo sensor

×3 : a photo sensor (PR/PI) ×3.

- AFPI and ZMPI are turned ON in synchronization with focus mode and zoom mode, respectively.

- ZMPR can be controlled independently, regardless of mode.

[Actuator applications]

Focus

Shutter

Iris

Zoom

Applications

STM

VCM

VCM

DCM

Continued on next page.

Ordering number : ENN7899

Monolithic Digital IC

DSC Motor Driver

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