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-# Design Specifications 
  
-Desired NinjaSCC Specs to have a common frame of reference during design and 
-documentation phase. 
  
-## Electrical+^   Parameter    ^   Value   ^ 
 +|     Layers     |     2     | 
 +|   Thickness    |   2 mm    | 
 +|     Copper     |   70 µm   | 
 +|   Silkscreen   |   White   | 
 +|   Soldermask   |   Black   | 
 +|  Substrate HQ  |  P96/P26  | 
 +|  Substrate MQ  |   IS410   | 
 +|  Substrate LQ  |    FR4    |
  
-### Input 
- 
-| Symbol           | Parameter                  | Min  | Typ  | Max  | Unit | 
-|:----------------:|:--------------------------:|:----:|:----:|:----:|:----:| 
-| V<sub>MPP</sub>  | PV MPP Voltage             | 11.5 |  18  | 36   | V    | 
-| V<sub>OC</sub>   | PV Open-Circuit Voltage    |      |      | 45   | V    | 
-| I<sub>SC</sub>   | PV Short-Circuit Current   |      |      | 15   | A    | 
-| P<sub>MPP</sub>  | PV MPP Power               |      |      | 250  | W    | 
-| -                | Panel/Cell Configuration   |  18  |  36  | 72   | Cells| 
- 
-### Battery 
- 
-| Symbol           | Parameter                  | Min  | Typ  | Max  | Unit | 
-|:----------------:|:--------------------------:|:----:|:----:|:----:|:----:| 
-| V<sub>Bat</sub>  | Charge Voltage             | 5    | 13.4 | 45   | V    | 
-| I<sub>Bat</sub>  | Charge Current             |      |      | 15   | A    | 
- 
-NinjaSCC will by default fall into a 12V system. Any other check, charge,  
-equalize and float setpoints can easily be overriden in software to leave 
-more headroom for all kinds of use-cases and many battery types like lead-acid, 
-gel,agm and lithium battery packs in the 12V to 36V range. 
- 
-### Load 
- 
-| Symbol           | Parameter                  | Min  | Typ  | Max  | Unit | 
-|:----------------:|:--------------------------:|:----:|:----:|:----:|:----:| 
-| V<sub>Load</sub> | Output Voltage             | 5    |      | 45   | V    | 
-| I<sub>Load</sub> | Cont. Output Current       |      |      | 15   | A    | 
- 
- 
-### Efficiency 
- 
-| Symbol               | Parameter                | Min  | Typ  | Max  | Unit | 
-|:--------------------:|:------------------------:|:----:|:----:|:----:|:----:| 
-| BK-MPP<sub>Eff</sub> | Buck-Mode MPP Efficiency |      | 98.5 |      | %    | 
-| BST-MPP<sub>Eff</sub>| Boost-Mode MPP Efficiency|      | 98.5 |      | %    | 
-| TR<sub>Eff</sub>     | Transit Efficiency       |      | 99.5 |      | %    | 
- 
- 
-## Environment 
- 
-| Symbol           | Parameter                  | Min  | Typ  | Max  | Unit | 
-|:----------------:|:--------------------------:|:----:|:----:|:----:|:----:| 
-| Temp             | Operating Temperature      | -40  |  25  |  85  | °C   | 
-| OTP              | Overtemperature Protection |      | +85  |      | °C   | 
-| OVP              | Overvoltage Protection     |      |      | 45   | V    | 
- 
-## PCB 
- 
-| Parameter            | Value    | 
-|:--------------------:|:--------:| 
-| Layers               |  2       | 
-| Thickness            |  2 mm    | 
-| Copper               |  70 µm   | 
-| Silkscreen           |  White   | 
-| Soldermask           |  Black   | 
-| Substrate HQ         | P96/P26  | 
-| Substrate MQ         |  IS410   | 
-| Substrate LQ         |   FR4    | 
- 
-## Protection 
- 
-### Electrical 
- 
-    * Short-Current  
-    * Over-Voltage 
-    * Over-Current 
-    * LVD (Low-Voltage Disconnect) 
-    * Undesired/Fatal Back-Channel DC GND return (High-Side Load Switch) 
-    * Electromagnetic and Lightning induced extraneous Voltage Transients 
-    * Local ESD 
-     
-### Environmental 
- 
-    * Battery Temperature Monitoring (optional) 
-    * PV Panel Temperature Monitoring (optional) 
-    * PCB Temperature Monitoring 
-    * Over-Temperature controlled Shutdown 
-    * Fan-Control 
-    * Assembly PU-Coating 
-     
-## Controller 
- 
-Since Arduinos have been around for a while and have a very broad 
-spectrum of documentation, HOWTOs and open-source code to learn from, the  
-AVR ATMega32U4 8-Bit Microcontroller (with built-in USB support so that  
-we can [give FTDI the finger](https://hackaday.com/tag/ftdigate/)) was  
-chosen as the main controller in a fully Arduino-Micro compatible  
-configuration while adding a couple of protective features to it.  
-This way, NinjaSCC can be used and flashed over USB like any other  
-Arduino-Micro board. 
- 
-## Monitoring & Metrics 
- 
-Constantly monitor and collect all relevant system metrics and operating 
-parameters and deliver a high-resolution, near real-time metrics stream 
-over USB to be live-viewed and/or shipped into a metrics storage engine  
-like [influxdb](https://github.com/influxdata/influxdb) to achieve  
-real-time, remote system awareness and data to optimize further. 
- 
-## Remote Control 
- 
-Any DC/DC regulation parameter can be overriden in software by remote 
-controlling NinjaSCC over USB, so playing and experimenting on a live,  
-working converter with instant metric feedback will be a great opportunity  
-to study its behaviour while changing parameters and operating modes  
-manually. And of course a fun and hands-on learning assistance while  
-teaching buck/boost technology to others. 
- 
-## Resilience 
- 
-Designed in a built-to-last approach, components have been selected in 
-a range between automotive qualified and up to aerospace/military grade 
-quality. A non-profit approach is the key here, because this way the 
-focus gets back where it should belong: On the product and the 
-component quality it is made of. Without undue compromise.  
-To further decrease the chance of total system failure, most important  
-system blocks and components have been set up n+1 redundant, wherever  
-possible and reasonable. Energy is everything. Without it, we are nothing. 
-NinjaSCC must withstand gale force sub-arctic winds at -40°C while still 
-providing power to the camera you've put out there for over a year, 
-to make a movie about glacier calving or you are in a remote desert and  
-need power to operate your water pump. When you're truely off-grid, this # 
-is the device that must not fail (or at last reasonably max out the chance  
-that it does), because murphy dictates: it usually does so at the worst possible point  
-in time.  
  
  
Trace:

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