TLP3547 Evaluation Board Comprehensive Evaluation Report

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TLP3547 Evaluation Board Comprehensive Evaluation Report [Copy link]

  1. Off topic: I had no plan to apply for this evaluation activity, but I received multiple email reminders, and I may use similar devices in the future, so I couldn't help but apply again. I received the evaluation board very quickly, and the packaging was in place as always, with two foam bags on the outside and a plastic shell inside. The plastic shell is the protagonist of the evaluation----TLP3547. 2. Opening----See The evaluation board of TLP3547 is made of two boards spliced together, which should be a structure specially adopted for the consistency of traditional relay packaging. Finally, the DIP package became the four pins below, the two on the left are the "coil" terminals, and the two on the right are the "normally open contacts". 2. Data sheet - check According to the official statement, TLP3547 is a high-current photorelay product series launched by Toshiba with DIP8 package and industry-leading 5A drive current. It is mainly used to promote its replacement of mechanical relays in industrial applications. There are three series: TLP3547, TLP3548 and TLP3549. TLP3547 is a 60V photorelay with industry-leading The TLP3548 is a 400V product with a 0.4A (max) drive current and a 1ms (max) high-speed switch. The TLP3549 is the industry's first photorelay using the super-junction MOSFET "DTMOS series", a 600V product with a 0.6A (max) drive current. The three series are graded and graded to suit different applications for different voltage and current levels. However, through checking, it can be found that Toshiba later released two medium-voltage products, one is the 100V TLP3823 with a 3A drive current, and the other is the 200V TLP3825 with a 1.5A drive current.

Toshiba's new photorelays have a guaranteed pulsed on-state current three times greater than the continuous on-state current, which ensures a wider safety design margin.

Below is the official data sheet for the TLP3547. 379745[/attach]

III. Characteristic Test

Two main tests were conducted: 1) The relationship between the forward voltage drop VF and the on-current IF on the LED side; 2) The action delay test between the "coil" on/off and the "contact" closing and opening

The test connection diagram is shown in the figure above. When testing 3.1, connect point A to the positive pole of the power supply, point B to the red test lead of the multimeter, and the black test lead of the multimeter to the negative pole of the power supply. A 1.5K resistor is connected in series in the middle. Set the multimeter to the mA current range to measure the current connection method. 3.2 During the test, point A is connected to the positive power supply (5V or 3.3V), point B is connected to the GPIO pin of the 51 MCU and the stm32 MCU. When the pin outputs a low level, TLP3547 is turned on. The measurement point is point B, and the "contact" output side is connected as shown in the figure above. C is connected to the power supply + (5V or 3.3V), the load is a 500Ω (measured resistance 499Ω) high-power winding resistor, point E is connected to the power supply -, and the measurement point is point D. 3.1 LED side, that is, the relationship between VF and IF on the “coil side”: 379748 379749 379750 379751 379752 379753 379754 379755 379756 379757 379758 379759 379750 379751 379752 379753 379754 379755 379756 379757 379758 379759 379750 379751 37975 3.2) Switching time delay test, no oscilloscope was used for the test, but a logic analyzer was used

3.2.1 Use 51 MCU for the test, the power supply voltage on the left and right sides is 4.78V

宋体]

The measured waveforms are two times closed and two times turned on.

Conclusion The delay time when turned on is about 1.57ms, and the delay time when turned off is about 0.1ms. , 宋体]3.2.2 Use STM32 MCU for testing. The actual power supply voltage on the left and right sides is 3.28V.

Conclusion The delay time when turned on is about 2.9ms, and the delay time when turned off is about 90us.

The data given in the manual is that the typical value of TON is 2.5ms, less than 5ms, and the typical value of TOFF is 0.1ms, less than 10ms.

ps: Please ignore the pictures below. Some pictures have incorrect internal editing content and are automatically attached as attachments and cannot be deleted.

Xuhuanbin

very nice,

Xuhuanbin

宝哥的小号

Hello, are the arrows marking the paths between them? How are the four pins connected to your diagram? Do you connect the power supply directly to the chip?

宝哥的小号

Isn't it just 1, 2 to connect to the power supply? After connecting to the power supply, 3.4 is not connected.

wo4fisher

Brother Bao's small account posted on 2018-9-28 18:22 Isn't it just 1 and 2 connected to the power supply? After connecting the power supply, 3.4 is not connected

23 is connected to the forward voltage of 1.5V, and then the 58 side needs to be connected to the power supply according to the figure. The inside is a semiconductor, not a pure resistor, and cannot be directly measured.

wo4fisher

Brother Bao's small account posted on 2018-9-28 18:22 Isn't it just 1 and 2 connected to the power supply? After connecting the power supply, 3.4 is not connected

The evaluation board has a resistor in series at the "coil" end, so the voltage must be slightly larger for the internal diode to conduct. The output end must be loaded and powered according to the diagram I drew, otherwise it will not work, or use a multimeter diode 8+5- to measure, the impedance will change.

wo4fisher

Posted by Bao Ge's small account on 2018-9-28 18:22 Isn't it just 1, 2 connected to the power supply? After connecting the power supply, 3.4 is not connected

There are test diagrams in the chip manual, or you can refer to the test diagram.