PCLT-2A数据手册电路保护的TVS-混合技术规格书PDF

描述 Description

The PCLT-2A is a dual input current limiter device designed for 24 V DC automation applications.

This product is compatible with the type 2 (7.5 mA) or type 3 (3 mA) characteristic of the IEC 61131-2 standard. An internal resistance RREFallows the limiting current value to be adjusted from 3 to 7.5 mA.

Each input voltage clamping block protects the module input against electromagnetic interference such as those described in the IEC 61131-2 standard, IEC 61000-4-2 (ESD), 4-4 (transient burst), 4-5 (voltage surge) and 4-6 (conducted radio frequency interference) standards. The supply input is also designed with such a protection structure.

The low tolerance of the current limitation allows a drastic reduction in the dissipation of the input compared to a resistive input. The PCLT2 is packaged in TSSOP14 - a very low RTHexposed pad package that allows the PCB cooling pad to be reduced.

The output block of each termination channel transfers the input logic state to a logic output and a light emitting diode (LED).

特性 Features

• 2 channel topology: low side input with common ground
• Wide range input DC voltage:
•VI= - 0.3 to 30 V with RI= 0 Ω
•VI= - 30 to 35 V with RI= 750 Ω
• Current limiter:
•3 to 7.5 mA programmable reference
•ILIM= 6.1 mA to 8.8 mA with RREF= 10 kΩ
•ILIM= 2.8 mA to 4.3 mA with RREF= 22 kΩ
•Narrow limiter spread: < 17%
•Temperature compensated operation
• Output drive:
•No output activation below 2 mA input
•1.5 mA minimum output activating current in opto-coupler mode
•Programmable CMOS output mode option (VMOD> 2.9 V)
• LED drive for sensor status: 4.4 mA typical with RREF= 10 kΩ
• Input protection (RI= 750 Ω CIN= 22 nF)
• IEC 61000-4-2 ESD, Level 4
•In contact, ± 8 kV; in air, ± 15 kV
•Criteria B: temporary disruption
• IEC 61000-4-5 voltage surge, Level 3
•± 500 V with 42 Ω series resistor in differential mode
•Criteria B: temporary disruption
• IEC 61000-4-4 transient burst immunity
•± 4 kV peak voltage; 5 kHz repetitive rate
•Criteria A: fully functional
• IEC 61000-4-6 conducted RFI
•10 VRMS
•Criteria A: fully functional
• Input protection against -30 V reverse polarity
• Ambient temperature: -25 to 85 °C
• Benefits
•Enable input to meet type1, 2 and 3 characteristics of IEC 61131-2 standard
•Compatible operation with 2 and 3 wires proximity sensor according EN60947-5-2 standard
•Flexible configuration driving either opto- coupler, or CMOS bus controller input, or 12 V AS-Interface network
•Reduced overall dissipation
•Enhanced functional reliability
•Compact with high integration
•Surface mount package for highly automated assembly
•Insensitive to the on-state sensor impedance

简介

PCLT-2A属于电路保护的TVS-混合技术。由制造生产的PCLT-2ATVS - 混合技术混合技术 TVS（瞬态电压抑制器）产品族中的产品属于过压保护产品，其中结合了基于多种技术的保护机制，例如串联连接的 MOV（金属氧化物压敏电阻）和 GDT（气体放电管），旨在同时获得低漏电流和自恢复箝位工作特性。