Broadcom SS02-0B00-00: Technical Overview and Application Guide

The Broadcom SS02-0B00-00 is a highly integrated optoelectronic module designed for precision motion control and encoding applications. This device exemplifies the critical role of optocouplers in providing reliable, noise-immune feedback in systems operating in electrically harsh environments. It functions as a reflective sensor, typically combining an infrared emitter and a phototransistor detector in a compact, standardized package.

A core technical characteristic of this module is its ability to detect contrast and motion. It achieves this by emitting infrared light from its internal LED and measuring the intensity of the light reflected back to its sensor. This principle allows it to accurately read patterns, such as those on a code wheel or code strip, translating physical movement into a digital square wave output. This output is essential for determining position, speed, and direction of rotation in various motor types.

The SS02-0B00-00 is particularly noted for its high resolution and response speed, making it suitable for demanding applications. Its design ensures stability across a range of operating temperatures, a vital feature for industrial and automotive systems. Furthermore, the built-in Schmitt trigger provides hysteresis, resulting in clean, sharp digital signal transitions even with slowly changing or noisy input signals, thereby significantly enhancing system noise immunity.

Application Guide

This sensor is ubiquitous in brushless DC (BLDC) motor commutation. Here, it is used to detect the position of the rotor by reading a patterned disk attached to the motor shaft. This information is fed back to the motor controller to electronically commutate the windings at the precise optimal moment for efficient and smooth operation.

Beyond motor control, its applications extend to:

Rotary and Linear Encoders: Providing essential feedback for closed-loop servo systems in robotics, CNC machinery, and precision instrumentation.

Tachometers: Measuring rotational speed for diagnostic and control purposes in consumer appliances (e.g., washing machines, drones) and industrial equipment.

Paper Detection: Sensing the presence or absence of paper, labels, or other materials in printers, copiers, and automated teller machines (ATMs).

General Purpose Object Detection: Used in vending machines, arcade games, and automation equipment to count items or confirm the presence of an object.

When integrating the SS02-0B00-00, key design considerations include the selection of appropriate current-limiting resistors for the emitter LED to ensure longevity and optimal output intensity, and pull-up resistors on the phototransistor output to define the logic high voltage level. Care must also be taken in the mechanical alignment between the sensor and the code wheel or target surface to maximize signal integrity.

ICGOOODFIND: The Broadcom SS02-0B00-00 is a fundamental optoelectronic component that provides critical motion sensing and encoding capabilities. Its robust design, noise immunity, and high reliability make it an indispensable solution for motor commutation and precision position feedback across a vast spectrum of industrial, automotive, and consumer applications.

Keywords:

Optocoupler

Motion Control

Encoder

BLDC Motor

Reflective Sensor