Typical application circuit and parameters of TLP52l-4(GB)

Photocoupler

TLP521-4(GB) Optical Isolation Module Overview

The optical isolation module TLP521-4(GB) is a fixed-timing optocoupler with exceptional base-emitter performance, offering superior conversion speed and high-temperature stability. Key features include a current transfer ratio ranging from 100% to 500%, an isolation voltage of at least 2500Vrms, a peak emitting/receiving voltage of 55V, a maximum leakage current of 10µA (at Ta = 85°C), and a minimum switching time of 42µs.

This device is particularly well-suited for applications requiring precise timing and reliable signal isolation. Its robust design ensures stable operation across a wide range of temperatures and conditions, making it ideal for industrial and automotive electronics. The TLP521-4(GB) is widely used in circuits where high-speed data transmission and electrical isolation are critical.

As illustrated in the typical application circuit below (Figure 1), this module demonstrates excellent performance in terms of both speed and accuracy. The conversion time parameters are detailed in Table 1, indicating that the maximum propagation delay is 42µs. This meets the requirements for efficient data transfer within a 1ms window, ensuring seamless communication even over long distances. By manipulating the input control pin, the optocoupler can be toggled between active and inactive states. When a high-level signal is applied to the input, the optocoupler operates normally, allowing the input signal to pass through to the output. Conversely, applying a low-level signal shuts down the output’s open-collector transistor, creating an external high-impedance condition.

Table 1 highlights additional specifications such as the forward current of the LED, the collector-emitter breakdown voltage, and the recommended operating conditions. These parameters underscore the versatility and reliability of the TLP521-4(GB). For instance, the forward current can reach up to 60mA, while the breakdown voltage is rated at 30V, providing ample headroom for various applications. Additionally, the module supports a wide operating temperature range, from -40°C to +110°C, ensuring its functionality in harsh environments.

In conclusion, the TLP521-4(GB) stands out as a reliable and efficient optocoupler, combining high-speed operation with robust insulation capabilities. Whether you’re designing a simple interface circuit or a complex industrial control system, this module offers the performance and flexibility needed to meet your requirements.