رله‌ رله‌ حالت‌جامد (اس اس آر)

Product Attributes

Introduction

The CPC1593 is a normally open (1-Form-A) Solid State Relay that incorporates load current limiting with over-voltage protection and thermal management. This self-resetting triple protection scheme protects not only the CPC1593’s load, but also the CPC1593 itself, thus creating a highly effective switching mechanism that is designed to survive in the harshest operating environments. Over-voltage protection is activated when the voltage across the switch is greater than 21V and the device is in current limit. The over-voltage protection deactivates the switch while allowing a restricted load current of less than 100μA to flow. When the voltage across the switch falls below the over-voltage threshold, the switches reactivate. If the fault persists, then these responses will repeat. The CPC1593 is designed for use in AC environments where fault conditions can persist for long periods of time, and where, upon removal of the fault, return to normal operation is expected. The CPC1593 is designed to survive extended power cross conditions. The CPC1593 is an optically coupled Solid State Relay composed of an input LED, two output MOSFET switches, and a photovoltaic array with operational management circuitry that integrates switch control, an active current limit with excess power regulation and thermal supervision circuitry. Designed specifically for switching AC loads, the CPC1593 is ideal for controlling in-rush current by means of it’s integrated active current limit with excess power regulation feature. The CPC1593 may also be used for switching low voltage DC loads. The CPC1593 has two different operating configurations: (1) unidirectional “DC Only”, and (2) bidirectional “AC/DC”. When configured for unidirectional DC-only operation, the device is limited to switching load voltages having a known fixed polarity but when configured for AC/DC operation, the CPC1593 is capable of polarity independent voltage switching. The advantage of operating the device in the AC/DC configuration is the flexibility of switching AC load voltages while restricting in-rush current to the maximum current limit value shown in the Electrical Characteristics table without sacrificing fault protection. Fault tolerance management at the CPC1593 load terminals is accomplished using a combination of current limiting, switch power regulation and thermal supervision. These features autonomously provide protection during fault conditions, then disengage once the fault clears allowing the device to automatically resume normal operation without external intervention. Faults originate from a number of causes ranging from equipment malfunctions such as load integrity failure or load voltage supply failure to environmentally initiated events such as power line contact with outside cabling or ground bounce due to a nearby lightning strike. Generally when a potentially damaging fault condition occurs, it presents itself as an elevated voltage resulting in excess load current through the switch.Active current limiting circuitry within the CPC1593 provides protection for itself, the printed circuit board (PCB) traces and the load by restricting the surge current to a tolerable level. Limiting the fault load current regulates the maximum power across all of the load components external to the CPC1593.

Features

• Integrated Active Current-Limit with Over-Voltage Protection Thermal Regulation
• 600Vₚ Blocking Voltage
• Guaranteed Turn-On: 2mA Input Control Current
• 3750Vᵣₘₛ Input/Output Isolation
• Low Drive Power Requirements
• Arc-Free With No Snubbing Circuits
• No EMI/RFI Generation
• Flammability Rating UL 94 V-0

Applications

• In-Rush Current Control
• Heating, Ventilation, Air Conditioning Control (HVAC)
• Security Systems
• Power Supplies
• Home Appliances
• IC Equipment Protection
• Instrumentation
• Medical Equipment—Patient/Equipment Isolation
• Industrial Controls