LC898201

DATA SHEET www.onsemi.com CMOS LSI Iris/Zoom/Focus/Day‐Night Switching Drive Controller LC898201 Overview LC898201 is the appropriate motor control LSI for the surveillance camera usage, and it can drive iris, focus, zoom and Day/Night switching simultaneously. It incorporates feedback control circuits (max 2-systems), stepper motor control circuits (max 3-system) and VCM control circuit (1-system). Feedback Control Applies Iris Stepper Motor Controls Apply Focus, Zoom and Day/Night Switching Feedback Control Applies Iris Stepper Motor Controls Apply Focus and Zoom VCM Applies Day/Night Switching LC898201 can control a variety of lens units like these examples. Features Built-in Equalizer Circuit by Digital Operation ♦ Iris Control Equalizer Circuit ♦ Focus Control Equalizer Circuit (MR sensor can be connected) ♦ Coefficients can be Set Arbitrarily through the SPI Interface ♦ Computed Values in the Equalizer can be Monitored Built-in 3ch Stepper Motor Control Circuits SPI Bus Interface PI Control Circuit ♦ 30 mA Sink Output Terminal ♦ Built-in PI Detecting Function (A/D method) A/D Converter ♦ 12bit (6ch): Iris, Focus, PI Detection, General D/A Converter ♦ 8bit (4ch): Hall Offset, Constant Current Bias, MR Sensor Offset Operation Amplifier ♦ 3ch (Iris Control ×1, Focus Control ×2) PWM Pulse Generator ♦ PWM Pulse Generator for Feedback Control (Up to 12 bit Accuracy) ♦ PWM Pulse Generator for Stepper Motor Control (Up to 1024 Micro Steps) ♦ PWM Pulse Gener...