TLP250 contains a GaAlAs light emitting diode and an integrated photodetector, 8-pin dual-row package structure. It is suitable for IGBT or power MOSFET gate drive circuit. TPL250 use characteristics: ①TLP250 output current is small, when driving a larger power IGBT, an external power amplifier circuit is required; ②Because the current flowing through the IGBT is detected by other circuits, and only the current flowing through the IGBT is detected.