Radiation Tolerant LED PSU
Power supply unit for emergency lamps that may need to be used in areas with radiation. The power supply consists of a transformer, a diode bridge, capacitors and an optional voltage stabilisation device. It converts a 207V to 253V 50Hz AC to a stable DC voltage and current, as required by the LED load.
TEMPLATE TEXT BELOW. PLEASE MODIFY*
Functional specifications
- 5 input/output ports with independently programmable direction (Lemo 00 connectors).
- Output levels: LVTTL, capable of driving +2.5 V over a 50-Ohm load. At power-up the outputs are in Hi-Z state.
- Input levels: any logic standard from Vih = 1 V to Vih = 5 V (programmable threshold).
- Output Rise/fall times: max. 2 ns.
- I/O bandwidth: 200 MHz.
- Programmable 50-Ohm input termination in each channel.
- LVDS I/O on the carrier side.
- One of the inputs is capable of driving a global clock net in the carrier's FPGA.
- Inputs and outputs protected against +15V pulses with a pulse width of up to 10us @ 50Hz.
- 4-layer PCB
Block diagram
Project information
- Official production documentation: EDMS EDA-02408
- Notes on the hardware design
- Software
- Frequently Asked Questions
- Users
Contacts
Commercial producers
- FMC DIO - FMC 5-channel Digital I/O module Seven Solutions, Spain
- FMC DIO 5ch TTL a Creotech, Poland
- fmc dio 5chttla INCAA Computers, Netherlands.
Project
- Erik van der Bij - CERN - General question about project
- Tom Wlostowski - CERN - Designer
Project Status
Date | Event |
27-05-2011 | Start of brainstorming. |
19-07-2011 | Five cards built. Has some bugs. |
20-09-2011 | Updated schematics in SVN. Will pass through CERN's design office. |
12-10-2011 | Production documentation available in EDMS. Project closed. |
07-11-2011 | Seven Solutions will produce and commercialise the cards. |
16-12-2011 | Order placed for production test software writing. |
24-02-2012 | Seven Solutions will deliver 5 cards 2nd week of March. Production test program will be written in March. |
20-03-2012 | Two IC's in design V1-0 are of wrong type. Will create a new version. No PCB change required. |
13-04-2012 | First version of Production test program written and documented in PTS project. |
13-04-2012 | Order for 10 V1 modules placed. |
15-08-2012 | V2-0 design being made to solve known Issues. V1-2 solves issue 487. Removed "withstands output shorted" spec: it works but is out of spec of driver IC. |
13-09-2012 | Delivery of 10 V1 modules will be shipped to CERN. |
25-10-2012 | Review of V2-0. |
26-06-2014 | A new version of the PTS test program exists that loads the EEPROM with SDB data. Please contact us for info. |
Tom Wlostowski, Erik van der Bij - 9 February 2015