●Detailed Description of Change
■Littelfuse IXYS Integrated Circuits Division (ICD) would like to inform you of a change to the data sheet parameter “Input Control Current to Deactivate” and the addition of an “Input Control Voltage to Deactivate” parameter.
■The minimum “Input Control Current to Deactivate” rating is being reduced from 0.4 mA to 0.1 mA. A new parameter, “Input Control Voltage to Deactivate”, is being added to the data sheet with a minimum rating of 0.8 V.
■These changes are effective immediately and are documented in the updated data sheets available on the Littelfuse website.
●Reason for Change
■To ensure the security of supply for these products, an alternative supplier of the input LED was qualified and put into production. Over time, this more efficient LED exhibited a tendency to maintain the activated state of some Solid State Relays (SSRs) at lower input currents than its predecessor. Whereas the previous less efficient LED was not able to sustain operation with an input current of 0.4 mA, the replacement LED could. Reducing the minimum input control current to 0.1 mA guarantees the SSRs will deactivate as expected.
■In order to simplify circuit design where the input current cannot be accurately predicted, a secondary deactivation input control parameter is being provided. This supplementary deactivation parameter is based on the voltage applied to the input LED. As stated in the updated data sheets, the minimum voltage applied to the input LED that will sustain operation is 0.8 V.

Brand of Product：	Littelfuse
Part#：	LAA127 、 LBB127 、 LAA127P 、 LBB127P 、 LAA127PTR 、 LBB127PTR 、 LAA127S 、 LBB127S 、 LAA127STR 、 LBB127STR More Part#
Product Category：	More
Application：	More
Data Type：	PCN/EOL More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	April 15, 2024
Version Number：
Data Encoding：	PCN EIC-1131
Data Size：	168 KB