HCPL-817-W6AE

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Optoisolators - Transistor, Photovoltaic Output provide electrical isolation between two circuits, thereby protecting control circuitry from high-voltage transients and interferences in the process. The HCPL-817-W6AE optoisolator offers a combination of performance, versatility, and reliability in a small SO-8 package. It features a photovoltaic transistor output with a high collector saturation voltage (VCE(sat) of 0.5V) and a low base-emitter saturation voltage (VBE(sat) of 0.7V) to provide fast switching and low power dissipation.

The HCPL-817-W6AE is designed for applications that require isolation between a high-voltage power circuit and the control circuit. It’s ideal for use in building control, automation equipment, industrial control systems, and a variety of applications that require high voltage isolation of the control circuit. The small form factor and low power consumption also make it suitable for use in mobile devices.

Working Principle

The HCPL-817-W6AE uses a photovoltaic output optoisolator to provide electrical isolation between two circuits. This optoisolator couples a LED input with a high-gain NPN transistor output. When an input current is supplied, the LED emits light that activates the phototransistor output. The phototransistor then amplifies the current, which can be used to drive circuits with a voltage up to 400V.

To provide electrical isolation between the two circuits, the HCPL-817-W6AE implements a double-die construction where the LED and the phototransistor are in separate wafers. This allows the LED and phototransistor to be independently biased, providing excellent electrical isolation.

Features & Benefits

• High collector saturation voltage (VCE(sat) of 0.5V) for fast switching
• Low base-emitter saturation voltage (VBE(sat) of 0.7V) for low power dissipation
• High gain output current (IBO) up to 85mA
• Small SO-8 package for use in mobile devices and other space-constrained applications
• Double die construction for excellent electrical isolation between the LED and phototransistor
• High voltage isolation between the input and output circuits

Applications

The HCPL-817-W6AE optoisolator can be used in a variety of applications that require electrical isolation between a high-voltage power circuit and the control circuit, including building control, automation equipment, and industrial control systems.

In building control and automation equipment, this optoisolator can be used to protect important control circuitry from interferences in the process and high-voltage transients. In industrial control systems, the HCPL-817-W6AE can be used to switch high voltage loads, such as solenoid valves, relays, and motors.

The small form factor and low power consumption of the HCPL-817-W6AE also make it suitable for use in mobile devices, such as smartphones and tablets, where space and power consumption are paramount.

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