PC923 Technical Summary

Overview

The PC923 is a high-performance optocoupler designed for driving power MOSFETs and IGBTs in a variety of industrial and consumer applications. It integrates a direct drive circuit, enabling efficient switching of high-power devices while maintaining excellent noise immunity and isolation. The device is widely used in inverter-controlled systems, such as air conditioners, due to its high-speed response and robust electrical characteristics.

With a wide operating supply voltage range and high isolation voltage, the PC923 ensures reliable performance in demanding environments. It is also recognized by UL (file No. E64380), making it suitable for safety-critical applications.

Features

• Built-in Direct Drive Circuit: Capable of driving MOSFETs and IGBTs with output currents (IO1P, IO2P) up to 0.4A.
• High-Speed Response: Features low propagation delay times (tPLH, tPHL) for efficient switching applications.
• Wide Operating Supply Voltage Range: Supports a broad range of supply voltages (Vcc: 15V to 30V), enhancing versatility.
• High Noise Immunity: Designed to operate reliably in noisy environments, making it ideal for industrial applications.
• High Isolation Voltage: Provides strong electrical isolation between input and output (VISO), ensuring safety and reliability.
• UL Recognized: Certified under UL file No. E64380, meeting stringent safety standards.

Applications

The PC923 is suited for a variety of applications, including but not limited to:

• Inverter-Controlled Air Conditioners: Provides reliable switching for compressor drives and fan controls.
• Industrial Motor Drives: Used in variable frequency drives (VFDs) for precise motor control.
• Power Supplies: Ensures isolated gate driving in switch-mode power supplies (SMPS).
• Renewable Energy Systems: Suitable for solar inverters and wind turbine converters.
• Automotive Electronics: Used in electric vehicle (EV) power management systems.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (Vcc): 15V to 30V
• Operating Temperature Range (Ta): -10°C to 60°C
• Output Current (IO1P, IO2P): 0.4A (max)
• Isolation Voltage (VISO): High isolation voltage as specified in datasheet

Key Performance Parameters

• Propagation Delay (tPLH, tPHL): Optimized for high-speed switching.
• Common-Mode Rejection (CMH, CML): Ensures stable operation in noisy environments.
• Input-Output Isolation: Meets industry standards for safety and reliability.

Package Information

Pin Configuration

The PC923 is available in an 8-pin DIP package with the following pinout:

• Pin 1: NC (No Connection)
• Pin 2: Anode (Input side LED anode)
• Pin 3: Cathode (Input side LED cathode)
• Pin 4: NC (No Connection)
• Pin 5: Not Connected (Refer to datasheet for variant-specific details)
• Pin 6: Output (Gate drive output)
• Pin 7: GND (Ground reference for output side)
• Pin 8: Vcc (Supply voltage for output side)

Outline Dimensions

The device adheres to standard DIP package dimensions. For exact mechanical specifications, refer to the latest datasheet provided by SHARP.

Note: Always verify the latest device specifications before design-in. SHARP does not assume responsibility for defects arising from the use of outdated documentation.

Internal Connection Diagram

The PC923 integrates an OPIC (Optoelectronic Integrated Circuit) structure, combining a light-detecting element and a signal-processing circuit. This design ensures efficient signal transmission across the isolation barrier while minimizing external component requirements.

The internal diagram includes:

• Input-side LED for optocoupling.
• Output-side driver circuitry with transistors (Tr1, Tr2) for gate drive amplification.
• Built-in protection features to enhance reliability.

Additional Notes

For optimal performance, adhere to the following guidelines:

• Ensure proper heat dissipation in high-current applications.
• Use recommended PCB layout practices to minimize noise coupling.
• Verify isolation requirements based on application safety standards.

For the most up-to-date information, consult SHARP's official documentation or contact their technical support team.