CIRCUITO Optoacoplador Salida DarlINGTON. APLICACIONES:
• Low power logic circuits
• Telecommunications equipment
• Portable electronics
• Solid state relays
• Interfacing coupling systems of different potentials and impedances.
AMPLIFICADOR OPTOAISLADO, ENCAPSULADO DIP-8. The HCPL-7840 isolation amplifi er family was designed for current sensing in electronic motor drives. In a typical implementation, motor currents fl ow through an external
resistor and the resulting analog voltage drop is sensed by the HCPL-7840. A diff erential output voltage is created on the other side of the HCPL-7840 optical isolation barrier. This differential output voltage is proportional to the motor current and can be converted to a single-ended signal by using an op-amp as shown in the recommended application circuit.
The HCPL-0370/3700 and HCPL-3760 are voltage/current threshold detection optocouplers. The HCPL-3760 is a low-current version of the HCPL-0370/3700. To obtain lower current operation, the HCPL-3760 uses a high-efficiency AlGaAs LED which provides higher light output at lower drive currents. The devices utilize threshold sensing input buffer ICs which permit control of threshold levels over a wide range of input voltages with a single external resistor. The input buffer incorporates several features: hysteresis for extra noise immunity and switching immunity, a diode bridge for easy use with ac input signals, and internal clamping diodes to protect the buffer and LED from a wide range of over-voltage and over-current transients. Because threshold sensing is done prior to driving the LED, variations in optical coupling from the LED to the detector will have no effect on the threshold levels.
El optoaislador MOC3011 consta de un diodo emisor de infrarrojos de arseniuro de galio, acoplado ópticamente a un interruptor bilateral de silicio y está diseñado para aplicaciones que requieren disparo aislado de TRIAC, bajo corriente de conmutación aislado de CA, un alto aislamiento eléctrico (a 7500V pico), de alto voltaje detector de punto muerto, pequeña tamaño, y de bajo costo.
The MOC3022 is a optically isolated triac driver devices. These devices contain a GaAs infrared emitting diode and a light activated silicon bilateral switch, which functions like a triac. They are designed for interfacing between electronic controls and power triacs to control resistive and inductive loads for 115/240 VAC operations.