820155 DC-DC Supply 10-32Vin 90W KTD-00740-C Public User Manual Date: 2008-04-24 Page 1 of 9 User Manual for the 820155 DC-DC Power Supply 90W 10-32Vin
820155 DC-DC Supply 10-32Vin 90W KTD-00740-C Public User Manual Date: 2008-04-24 Page 2 of 9 Introduction The 820155 DC-DC Power Supply is a fully compliant ATX power supply designed to power a wide variety of motherboards like the KT690mITX, 786LCD/mITX, 886LCD-M and 986LCD-M families of boards. It has included cable kit inclusive ATX+12V cable, as required by the KT690 and 986LCD-M families.
820155 DC-DC Supply 10-32Vin 90W KTD-00740-C Public User Manual Date: 2008-04-24 Page 3 of 9 The power supply can be operated in two types of modes: “Standard ATX Supply Mode” and “Battery Driven Application Mode”. The input power voltage shall be 10 – 32V except for Battery Driven Application Mode where the minimum power input voltage is 11.2V (down to 8V is allowed for maximum 1 minute).
820155 DC-DC Supply 10-32Vin 90W KTD-00740-C Public User Manual Date: 2008-04-24 Page Functional diagram ATX+12V Conn. (J2) +V (J1) -V (J4) Protection circuit (Filter, Fuse, TVS, Under voltage, reverse voltage) Switch Logic 10 – 32V DC/DC converters LED (J5) SW (J3) Amp (J6) Microcontroller and I/O interface Jumpers (J10) Connector position J1 = +V J2 = ATX+12V J3 = SW J4 = -V J5 = LED J6 = AMP J7 = ATX Connector J8 = Switch J9 = Switch J10 = Jumpers ATX Power Conn.
820155 DC-DC Supply 10-32Vin 90W KTD-00740-C Public User Manual Date: 2008-04-24 Page 5 of 9 Functional/Connector description +V (J1) is for 10 – 25V power input (Vin) with reference to –V (J4). -V (J4) is Ground reference to +V (J1). SW (J3) Switch On/Off signal input to be used in Battery Driven Application Mode. This input shall be left unconnected when the PSU is used in Standard ATX Supply Mode (no Jumpers installed in J10).
820155 DC-DC Supply 10-32Vin 90W KTD-00740-C Public User Manual Date: 2008-04-24 Page 6 of 9 Jumpers (J10) By use of up to 3 Jumpers it is possible to select between 8 microcontroller driven timing modes. The default mode is no Jumpers installed in the J10 connector, position A, B, C and D. This mode is the standard ATX Supply mode.
820155 DC-DC Supply 10-32Vin 90W KTD-00740-C Public User Manual Date: 2008-04-24 Page 7 of 9 AMP (J6) The AMP connector can be used to remotely mute Audio Amplifiers etc. the first 4 seconds after PSU is turned on. In general the AMP is not required to mute the motherboard audio system when the motherboard is booting. In stead the BIOS can silence the speaker system. Pin 1 2 Signal Gnd RMT The RMT signal is unconnected the first 4 seconds after PSU turns on and then it is connected to Vin.
20155 DC-DC Supply 10-32Vin 90W KTD-00740-C Public User Manual Date: 2008-04-24 Page 8 of 9 Installation guide Standard ATX Supply mode: 1. Make sure no Jumpers are installed in J10. 2. Connect the PSU ATX Connector to the Motherboard ATX connector via the ATX Cable. The cable kit can be mounted two ways, make sure it’s done as requested.
820155 DC-DC Supply 10-32Vin 90W KTD-00740-C Public User Manual Date: 2008-04-24 Page 9 of 9 Specifications Input Requirements Battery Driven Application Mode: 12V battery, 11.2 -24V (down to 8V for a few seconds is accepted). Standard ATX Supply Mode: 10 – 25V regulated, max=15A. The power input is protected against over-voltage transients, short circuits (>15A) and in Battery Driven Application Mode the battery is protected against Deep Discharging.
