Nuvoton KA41908B Lens Motor Driver
Zoom, focus and iris cotrol lens driver | CAP Control, 256 microstep | SPI
Main Features
- Voltage drive system 256-step microstep drivers (2 systems)
- Motor current amplitude and phase can be adjusted for each channel (CAP (Correction Amplitude & Phase) function)
- Accurate position control of Iris by using Hall sensor and built-in PID control circuit
- Motor control by 4-line serial data communication
- 2 systems of open-drain for driving LED
Description
KA41908B uses a unique digital circuit for Hall Iris position control to realize low power consumption and low acoustic noise drive. This help to shorten the lens module design time.
In addition, KA41908B has CAP(Correction of Amplitude and Phase) function, which enables the stepper motor for zoom / focus to operate with low acoustic noise. Stepper control by internal settings through SPI interface communication contributes to reducing calculation load of MCU.
KA41908B is the best selling product for lens module drive of surveillance camera and web camera.
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