TLP3547 Evaluation Board Evaluation Report (II) - Response Speed Test

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TLP3547 Evaluation Board Evaluation Report (II) - Response Speed Test [Copy link]

 Following the article "TLP3547 Evaluation Board Evaluation Report (I) - Unboxing", this article will test the Toshiba photorelay TLP3547. This article tests the response speed. (Posting failed, restored from draft box, seems the picture is lost? Try to post again, if there is no picture, I will make it up later.) Experimental preparation: 1. Adjustable square wave generator (self-made) 2. 3.3V to 12V adapter board (self-made) 3. Voltage source 4. Oscilloscope 5. Load A group photo of the low-value experimental materials prepared Since I am relatively poor and don’t have a signal generator, I just made a simple one with the development board at hand. A homemade signal generator with adjustable square wave output, square wave 50Hz-1000Hz adjustable, duty cycle adjustable. Frequency step 10Hz, duty cycle step 0.1%. Since the output signal voltage of the above signal generator is 3.3V, it is not enough to drive Toshiba photorelay TLP3547. So next, make a self-made adapter board. Convert 3.3V to 12V. Use 5551 for signal amplification, and add a follower to reduce the output impedance. The load uses a 10K resistor, and the overall connection is completed. Connect a 12.6V voltage source and an oscilloscope probe, and start testing. Here's a picture of the whole thing First test the response speed under a 50Hz signal Expanding the waveform, we can see that the turn-on time is less than 0.5mS, which is much better than ordinary mechanical relays. Next, the performance of 100Hz, 200Hz, and 300Hz tests are similar. When the frequency rises to about 340Hz, it can no longer be fully conductive The above picture is from the manual of Toshiba photorelay TLP3547. Under my test conditions, the current is 12.About 5mA. The response speed is even better. The above test is a response speed test. Compared with traditional mechanical relays, it is not only a huge advantage in size. The speed is also much better. And it is silent.