PS2503-4 Datasheet/PDFOptoisolators are devices that create electrical isolation between two or more circuits by using light. This type of isolation helps to prevent damage to sensitive electronic devices from high voltage transients or ground loops, and also eliminates capacitive or inductive coupling between the two circuits. PS2503-4 is a photovoltaic output optoisolator, which is designed to provide electrical isolation of up to 2500Vrms between the input and output circuits. Its high voltage isolation and wide operating temperature range make it suitable for a wide range of applications, such as motor control, robotics, and signal conditioning for industrial automation.
The basic operation of a photovoltaic output optoisolator is based on the photoelectric effect. In the simplest terms, when light shines on the photodiode, it produces a current, and when a voltage is applied to the photodiode, the current is released. This current is then applied to the phototransistor, which amplifies the signal, allowing it to be used as a switch for a device. The PS2503-4 optoisolator has two photodiodes, one for input and one for output, with a single phototransistor connected to both. In this way, the two circuits can be isolated from each other at high voltages.
The PS2503-4 optoisolator has a wide operating temperature range of -40°C to +85°C, and its input-output isolation is rated up to 2500Vrms. It has a current transfer ratio (CTR) of 50 – 200%, meaning that the output voltage is proportional to the input voltage up to 200%. This makes the device suitable for motor control, robotics, and other application where a high degree of accuracy is required.
The PS2503-4 optoisolator has two distinct modes of operation: normal operation and short circuit protection. In normal operation, the output transistor is enabled when the input voltage is greater than the threshold voltage. The current then flows through the phototransistor, activating the output circuit. In case of a short circuit, the current sensing circuit in the optoisolator detects it and immediately turns off the output transistor, preventing any damage to the output circuit.
The PS2503-4 optoisolator has a wide range of applications, such as motor control, robotics, and signal conditioning for industrial automation. It is particularly useful for high voltage applications, where a high degree of electrical isolation is required. Its wide operating temperature range allows it to be used in harsh environments, and its short circuit protection ensures that the output circuit is not damaged in case of a short circuit. Overall, the PS2503-4 optoisolator is a reliable and versatile product, making it suitable for a wide range of applications.