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lab:ninjascc:hardware [2016-03-11 21:03] – chronolab:ninjascc:hardware [2016-04-02 09:13] (current) – chrono
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 ====== NinjaSCC Hardware ====== ====== NinjaSCC Hardware ======
  
-# Design Specifications+{{:lab:ninjascc:ninjascc.sch.svg|}}
  
-Desired NinjaSCC Specs to have a guideline during design phase. 
  
-| Symbol           | Parameter                  | Min  | Typ  | Max  | Unit | 
-|:----------------:|:--------------------------:|:----:|:----:|:----:|:----:| 
-| V<sub>MPP</sub>  | PV MPP Voltage             | 5    |      | 45   | V    | 
-| V<sub>OC</sub>   | PV Open-Circuit Voltage    |      |      | 50   | V    | 
-| I<sub>SC</sub>   | PV Short-Circuit Current   |      |      | 15   | A    | 
-| P<sub>MPP</sub>  | PV Power                   |      |      | 250  | W    | 
-| V<sub>Out</sub>  | Output Voltage             | 0    |      | 28   | V    | 
-| I<sub>Out</sub>  | Output Current             |      |      | 12.5 | A    | 
-| OVP              | Overvoltage Protection     |      |      | 45   | V    | 
-| OTP              | Overtemperature Protection |      | 125  |      | °C   | 
-| MPP<sub>Eff</sub>| MPP Efficiency             |      | 98.5 |      | %    | 
-| PM<sub>Eff</sub> | Panel-Mode Efficiency      |      | 99.5 |      | %    | 
  
 +^   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 
- 
-| Parameter            | Value    | Unit  | 
-|:--------------------:|:--------:|:-----:| 
-| Input Configuration  | 36 or 72 | Cells | 
-| Max. Input Voltage   | 45       | V     | 
-| Max. Input Current   | 20       | A     | 
-| Cont. Input Current  | 10       | A     | 
- 
-### Battery Output 
- 
-| Parameter            | Value    | Unit  | 
-|:--------------------:|:--------:|:-----:| 
-| Output Configuration | 12-24    | V     | 
-| Max. Input Current   | 20       | A     | 
-| Cont. Input Current  | 10       | A     | 
- 
-### Load Output 
- 
-| Parameter            | Value    | Unit  | 
-|:--------------------:|:--------:|:-----: 
-| Cont. Output Current | 10       | A     | 
- 
-## Environment 
- 
-| Parameter            | Value    | Unit  | 
-|:--------------------:|:--------:|:-----:| 
-| Min. Temperature     | -40      | °C    | 
-| Max. Temperature     | +85      | °C    | 
- 
-## PCB 
- 
-| Parameter            | Value    | Unit  | 
-|:--------------------:|:--------:|:-----:| 
-| Material             |  FIXME   |  -    | 
-| Layers               |  2       |  -    | 
-| PCB Thickness        |  2       |  mm   | 
-| Copper               |  70      |  µm   | 
-| Silkscreen           |  White   |  -    | 
-| Soldermask           |  Black   |  -    | 
- 
- 
-When the optimal operating condition falls into a narrow window 
-that Vin and Vout are within about ±2% of each other, the panel mode is engaged to take the advantage 
-of the almost lossless energy harvest feature. In panel mode as shown in Figure 6, Q5A/B remains ON 
-while the DC/DC converter shuts down, establishing a direct link between the PV panel output and the 
-string. 
- 
-When the panel mode is not the optimal operating condition, the MPPT/PM controller will turn-off PM 
-switches and engage the DC/DC converter for maximum power tracking. In a conventional Buck-and- 
-Boost converter, switching of the diagonal switches is synchronized. Namely Q1 and Q3 are turned on 
-and off at the same time. So are Q2 and Q4. 
- 
-NinjaSCC has four operating modes: 
- 
-  * Buck-Only (BK) 
-  * Boost-Only (BST) 
-  * Buck-Boost-Interleaved (BB) 
-  * Bypass (BP) 
- 
-Based on real-time assessment of the operating conditions, NinjaSCC dynamically 
-determines the optimal operating mode in order to track the maximum power point 
-of the PV panel, keeping overall conversion efficiency close to 100%. 
- 
- 
-Generally, when the PV panel’s Vmpp is lower than about 98% of Vout defined in Equation 2, the 
-controller will run the converter in the BK mode. Figure 7a shows the equivalent circuit of BK mode, where 
-only Q1 and Q2 are switching, while Q3 remains OFF and Q4 stays ON. 
-When the PV panel’s Vmpp is greater than about 102% of the output voltage defined in Equation 2, the 
-controller will run the converter in the BST mode. Figure 7b shows the equivalent circuit of BST mode. 
-Only Q3 and Q4 are switching, while Q2 remains OFF and Q1 stays ON. 
- 
- 
- 
-## Protection 
- 
-### ESD 
- 
-Input/Output lines can be subjected to extraneous voltage induced or directly connected - such as Electrostatic discharge (ESD). The circuitry itself should be designed to withstand the voltage. Special components 
-are available to do this and it is also possible to supplement the protection with Spark Gaps which can also be fabricated cheaply, as a trace pattern on a PCB. 
  
  
Trace:

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