Description:The PS2802-1 and PS2802-4 are optically coupled isolators containing a GaAs light emitting diode and an NPN silicon darlington-connected photo transistor in a plastic SSOP for high density applications. This package has shield effect to cut off ambient light.
Renesas provides a recommended PCB layout guide in their application notes (e.g., AN17992) and evaluation board documentation. It's essential to follow these guidelines to ensure proper thermal management, noise reduction, and signal integrity.
The input capacitor values depend on the specific application, input voltage, and output current requirements. Renesas recommends using X7R or X5R ceramic capacitors with a minimum capacitance of 10uF and a voltage rating of 1.5 times the input voltage. Consult the datasheet and application notes for more detailed guidance.
While the datasheet specifies an operating temperature range of -40°C to 105°C, it's essential to consider the maximum ambient temperature for reliable operation. Renesas recommends derating the device's power dissipation to ensure reliable operation above 85°C. Consult the thermal derating curves in the datasheet for more information.
To ensure EMC, follow Renesas' guidelines for PCB layout, component selection, and shielding. Use a metal shield or a shielded inductor to reduce electromagnetic radiation. Additionally, consider using a common-mode choke and a Y-capacitor to filter out noise and reduce EMI.
Renesas recommends using a low-ESR ceramic capacitor (e.g., X7R or X5R) with a minimum capacitance of 10uF and a voltage rating of 1.5 times the output voltage. The output capacitor value may need to be adjusted based on the specific application, output current, and ripple requirements.
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PS2802-1-V-F3-A Overview
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