The output terminal of the transistor optocoupler is a photosensitive transistor. Both the photodiode and the photosensitive transistor have linear characteristics and current amplification capabilities within a certain range. Transistor optocouplers are typically used for voltage feedback in power circuits and for signal detection and control in control circuits.Application areas: household appliances, switching power supplies, smart meters, etc.

The opto-isolated triac, internally integrating an optocoupler and a bidirectional triac, is commonly used for AC load control, including zero-crossing and non-zero-crossing output types. The standard type opto-isolated triac can provide a 100mA current driving capability, while the enhanced type (internally integrating dual-layer triacs) can provide a current driving capability ranging from 300 to 1200mA.Application areas: household appliances, lighting controllers, high-voltage AC switches, etc.

The output terminal of the Darlington optocoupler consists of two primary transistors, which have a higher current amplification factor compared to ordinary transistors. This allows for driving larger output currents with a small input current. Darlington optocouplers, like transistor optocouplers, are typically used for voltage feedback in power circuits and for signal detection and control in control circuits.Application areas: household appliances, switching power supplies, smart meters, etc.

The output terminal of the opto-relay is structured with a MOSFET. Opto-relays have several advantages including small size, absence of mechanical contacts, long lifespan, low actuation current, high isolation voltage, high-speed switching, low leakage current, and support for thermal switching. The triggering current of an opto-relay is very small, typically not exceeding 3mA.Application areas: automotive electric propulsion control systems, Battery Management Systems (BMS), battery monitoring, photovoltaic inverters, etc.

High-speed optocouplers are nonlinear optocouplers, with their current transfer characteristics exhibiting nonlinearity. These types of optocouplers are suitable for various high-speed communication protocol transmission scenarios, enabling lossless transmission of signals ranging from 1 to 50 MHz.Application areas: automotive electronic control, instrumentation, smart home, etc.

Gate Driver Optocouplers consist of a GaAsP LED, which is optically coupled to the power output stage of an integrated circuit. These optocouplers are particularly suitable for driving power IGBTs and MOSFETs.Application areas: servo motors, industrial variable frequency drives, etc.

Intelligent gate driver optocouplers are IGBT gate driver optocouplers that feature built-in functions such as Vce saturation detection, abnormal status feedback, UVLO (Under Voltage Lockout), Miller clamp activation, and automatic fault reset.Application areas: IGBT and power MOSFET isolation drivers (high-power power supply boards), brushless motor drives (elevator motors, water pumps), industrial inverters, UPS power supplies, etc.

The intelligent power module interface optocoupler is typically a gate drive interface optocoupler with high CMR (Common Mode Rejection).Application areas: IPM (Intelligent Power Module) interface isolation, isolated IGBT/MOSFET drivers (high-power power supply boards), AC and brushless DC motor drives (air conditioners, washing machines), industrial variable frequency drives, general-purpose digital isolation, etc.