TLP250 MOSFET IGBT Driver: Manufacturer, Footprint and Applications
07 November 2023
Ⅲ. TLP250 symbol, footprint and pin configuration
Ⅳ. What are the features of TLP250?
Ⅴ. Technical parameters of TLP250
Ⅵ. How to use TLP250 isolated MOSFET driver?
Ⅶ. What are the applications of TLP250?
TLP250 is an optical coupler manufactured by Toshiba. Its input side is composed of GaAAs series light-emitting diodes, and the output side obtains the driving signal through an integrated photodetector. Its main features are electrical isolation between low-power and high-power circuits, and the optical transmission of electrical signals through light. The TLP250 boasts a forward current of 20mA and a minimum isolation voltage of 2500Vrms. It thrives in an operating temperature range spanning from -55°C to 125°C, making it versatile for diverse environments. Furthermore, this component is equipped with built-in high-voltage switches and low-power drivers, offering attributes like noise suppression, resistance to transient impacts, and reverse voltage protection. As a result of these capabilities, the TLP250 finds widespread utility in applications like PWM control, motor drivers, inverters, and various other uses.
Replacements and equivalents:
• FOD817
• MOC3021
• PC817
• TLP250F
• TLP250H
The TLP250 is manufactured by Toshiba. Founded in July 1875, Toshiba is a Japanese multinational conglomerate headquartered in Minato District, Tokyo. It provides equipment manufacturing and solutions for power development, industrial production, environmental protection, commercial offices, semiconductors and other fields. It is Japan's largest semiconductor manufacturer and the second largest integrated motor manufacturer, and is part of the Mitsui Group. Toshiba's original name was Tokyo Shibaura Electric Co., Ltd., which was formed in 1939 through the merger of Shibaura Manufacturing Co., Ltd. and Tokyo Electric Co., Ltd.
Toshiba's semiconductor products are mainly divided into two parts: large-scale integrated circuits and discrete devices, mainly involving fields such as power devices and motor drives. It is a mainstream supplier in low-voltage MOS and high-voltage IGBT devices, especially in the field of new energy vehicles, and its products have been widely used.
The following figures show the symbol, footprint and pin configuration of TLP250 respectively.
The TLP250 is equipped with a total of 8 pins, each with their respective names and descriptions, which are as follows:
Pin 1 (NC): No connection
Pin 2 (Anode): Anode terminal of LED diode
Pin 3 (Cathode): The cathode terminal of LED
Pin 4 (NC): No connection
Pin 5 (GND): Connect with ground of power supply
Pin 6 (Vo): Output terminal
Pin 7 (Vo): Output terminal
Pin 8 (Vcc): Connect with positive terminal of power supply
• Bidirectional transmission: It supports bidirectional transmission. It can transmit data from the sending end to the receiving end, and can also transmit data from the receiving end to the sending end, realizing two-way exchange of data.
• Easy to drive: TLP250 can drive lower current and is easy to operate with a simple drive circuit.
• Wide voltage range: It is an optocoupler with a large input voltage range and can work stably under a variety of power supply conditions.
• High-speed transmission: Its transmission delay time is relatively short, which means it can achieve higher transmission speeds while maintaining data stability and reliability.
• High isolation voltage: TLP250 is a high-performance optocoupler with an isolation voltage of 2500Vrms. It can effectively isolate different parts of the circuit and ensure the safety of systems and equipment.
• Stable transmission: TLP250 can maintain the stability and reliability of data during the transmission process, and is suitable for occasions that require high-precision data transmission.
Due to the small output current of TLP250, it requires an external power amplifier circuit when driving a larger power IGBT. Since the detection of current passing through the IGBT is limited to other circuits, this may have a certain impact on the efficiency of the IGBT. For example, when the IGBT is in a safe working area, early protection sometimes occurs. In order to improve the response speed, the control circuit and detection circuit need to respond to the current signal quickly, which is usually required to be completed within 10 microseconds from the occurrence of overcurrent to the reliable shutdown of the IGBT.
When overcurrent occurs, TLP250 will receive the shutdown signal from the controller and apply a negative voltage to the gate of the IGBT to achieve hard shutdown. It should be noted that the du/dt of this main circuit is much larger than that in the normal switching state, which will cause the voltage applied to both ends of the IGBT to increase a lot, so we need to use it with caution to prevent IGBT breakdown.
• Medical equipment: It is able to isolate the electrical connection between the control circuit and the patient, thus ensuring the safety and reliability of the medical process.
• Communication equipment: It effectively separates signal transmission circuits from receiving circuits, preventing interference and noise propagation.
• Serial communication: The TLP250 can be used to isolate serial communication to protect the communication line between a computer or microcontroller and an external device, such as RS-232 or RS-485 communication.
• High voltage measurement: When high voltage signals need to be measured, the TLP250 can be used as a voltage isolator to isolate the high voltage circuit from the measuring equipment to protect the safety of the operator and the measuring equipment.
• Industrial automation: It can be employed for the purpose of isolating control signals and actuators in order to mitigate electrical interference and enhance system stability.
• Motor driver: Furthermore, the TLP250 can find application in motor driver circuits to create isolation between the control signal and the motor, enhancing circuit stability and safeguarding the control circuit from motor-induced noise interference.
Frequently Asked Questions
1. What is the function of TLP250?
TLP250 is suitable for the gate driving circuit of IGBT or power MOS FET. A GaAlAs light-emitting diode is used on the input side. An integrated photodetector provides a driving signal to the output side. As a result, electrical isolation between low and high power circuits is the most important aspect.
2. How to use TLP250?
TLP250 is used as non inverting low side mosfet driver. you should connect an electrolytic capacitor of value 0.47uf between power supply. It provide protection to tlp250 by providing stabilize voltage to IC.
3. How does the TLP250 provide electrical isolation?
The TLP250 uses an infrared LED to emit light, and this light is detected by a phototransistor on the other side. Since there is no direct electrical connection between the LED and the phototransistor, it provides electrical isolation between the input and output circuits.
4. What are the advantages of using a TLP250 in circuit design?
The TLP250 offers electrical isolation, low input power consumption, and high noise immunity. It can be used to protect sensitive components and provide galvanic isolation in critical applications.
5. Can the TLP250 be used to control high-power loads?
The TLP250 itself is a low-power device, and it is not designed for directly controlling high-power loads. However, it can be part of a control circuit to isolate and drive higher power devices such as relays or power transistors.
