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--- en:ztex_boards:ztex_fpga_boards:power_supply_selection [2011/12/05 21:42] – 84.181.74.229
+++ en:ztex_boards:ztex_fpga_boards:power_supply_selection [2011/12/05 22:11] – 84.181.74.229
@@ Line 1: / Line 1: @@
 ====== Power supply selection guide ======
-Experimental Boards [[http://www.ztex.de/usb-fpga-1/exp-1.2.e.html|1.2]], [[http://www.ztex.de/usb-fpga-1/exp-1.3.e.html|1.3]] and [[http://www.ztex.de/usb-fpga-1/exp-1.10.e.html|1.10]], [[http://www.ztex.de/usb-fpga-1/pwr-1.1.e.html|Power Supply Modules 1.1]] and [[http://www.ztex.de/usb-fpga-1/usb-fpga-1.15x.e.html|USB-FPGA Modules 1.15x]] have recommended valid input voltage range of 4.5V to 16V (absolute maximum: 18V).
+Experimental Boards [[http://www.ztex.de/usb-fpga-1/exp-1.2.e.html|1.2]], [[http://www.ztex.de/usb-fpga-1/exp-1.3.e.html|1.3]] and [[http://www.ztex.de/usb-fpga-1/exp-1.10.e.html|1.10]], [[http://www.ztex.de/usb-fpga-1/pwr-1.1.e.html|Power Supply Modules 1.1]] and [[http://www.ztex.de/usb-fpga-1/usb-fpga-1.15x.e.html|USB-FPGA Modules 1.15x]] have valid input voltage range of 4.5V to 16V (absolute maximum: 18V).
 All products are equipped with with a standard DC connector with 5.5mm outer diameter and 2.1mm center pin diameter. The center pin is the positive pole, the outer contact is negative pole.
-The following rules should be considered for the selection of the power supply:
+The following rules have to be considered for the selection of the power supply:
-  * Any power supply with minimum voltage of at least 4.5V and a peak voltage of less than 16V (absolute maximum: 18V) can be used. The current requirement depends from the product and the application.
+  * The peak voltage of the power supply must be less than 16 V (absolute maximum: 18 V) and the minimum voltage must be at least 4.5V. Any power supply within that range can be used. The current requirement depends from the product and the application.
   * If non-stabilized power supplies are used, it must be ensured that the peak idle voltage is within the valid range.
   * Stabilized power supplies are save if they are within the valid range. Switching supplies are always stabilized, stabilized transformer based supplies are usually labeled with "stabilized" or "regulated"
@@ Line 14: / Line 14: @@
   * From various shops in internet, e.g. from [[http://www.ebay.com/sch/i.html?_nkw=switching+power+supply+12v|Ebay]]
-  * Universal power supplies with switchable output voltage from the supermarket or electronic stores. These supplies should be stabilized since they have to work with a wide range of consumer electronics. Make sure that you choose a proper voltage and the correct polarization (center pin: +, outer contact: -)
+  * Universal power supplies with switchable output voltage from the supermarket or electronic stores. These supplies usually have voltage regulators. (Take care for the correct polarization: center pin: +, outer contact: -).
   * Power supplies from unused consumer electronics, e.g. routers, switches