Task: Formula-prediction-context (source dataset: ti-random)

You are given an table region extracted from a real Excel spreadsheet, which is centered around a cell called "Target Cell" (labeled as "[Target Cell]" shown in the table below). The table region below includes up to 10 rows above/below the Target Cell, and 10 columns to the left/right of the Target Cell. 

Your task is to analyze the table context surrounding the Target Cell, and predict the most likely Excel formula that should go in the Target Cell. If multiple formulas are possible, choose the most reasonable or commonly used based on context.

1. Please follow the standard formula syntax in Excel, e.g. always begins with an equal sign (=).
2. Base your predicted formula on the surrounding table context, e.g., column headers, annotations, and data values in nearby cells.
3. No explanation — just output the formula itself in a JSON format: {"formula": "your_formula_here"}.

Input Excel Snippet in Markdown format:
|    | B                                                             | C              | D                       | E   | F                                      | G                  | H      | I   | J   | K                         | L                     | M   | N                                        | O   | P   | Q   | R   |
|---:|:--------------------------------------------------------------|:---------------|:------------------------|:----|:---------------------------------------|:-------------------|:-------|:----|:----|:--------------------------|:----------------------|:----|:-----------------------------------------|:----|:----|:----|:----|
|  2 | CLEAR ALL USER INPUT GREEN CELLS BEFORE STARTING A NEW DESIGN |                |                         |     |                                        |                    |        |     |     |                           |                       |     |                                          |     |     |     |     |
|  3 | USER INPUTS                                                   |                |                         |     |                                        |                    |        |     |     |                           |                       |     |                                          |     |     |     |     |
|  4 | DESIGN REQUIREMENTS                                           |                |                         |     | USER SELECTED COMPONENT PARAMETERS     |                    |        |     |     |                           |                       |     |                                          |     |     |     |     |
|  5 |                                                               |                |                         |     |                                        | Target             | Actual |     |     |                           |                       |     |                                          |     |     |     |     |
|  6 | INPUT SPECIFICATIONS:                                         |                |                         |     | Input Bulk Capacitor (CIN)             | 150                |        | mF  |     | AC                        |                       |     |                                          |     |     |     |     |
|  7 | Minimum Input Voltage                                         | 90             | VAC                     |     | FLYBACK INDUCTOR                       |                    |        |     |     | DC                        |                       |     |                                          |     |     |     |     |
|  8 | Maximum Input Voltage                                         | 264            | VAC                     |     | Primary to Secondary Turns Ratio (NPS) | 6.500027009014009  |        |     |     | LATCH-OFF                 |                       |     |                                          |     |     |     |     |
|  9 | Minimum Line Frequency                                        | 47             | Hz                      |     | Primary Inductance (LP)                | 89.80068738378601  |        | mH  |     | SHUTDOWN/RETRY            |                       |     |                                          |     |     |     |     |
| 10 | Brownout Input Voltage                                        | 85             | VAC                     |     | Leakage Inductance                     | 1.7960137476757203 |        | mH  |     | intermediate calculations |                       |     |                                          |     |     |     |     |
| 11 |                                                               |                |                         |     | Primary to Bias Turns Ratio (NPB)      | 4.943134312244187  |        |     |     |                           |                       |     |                                          |     |     |     |     |
| 12 | OUTPUT SPECIFICATIONS:                                        |                |                         |     | HVMOSFET                               |                    |        |     |     | tON_initial               | [Target Cell]         | s   |                                          |     |     |     |     |
| 13 | Regulated Output Voltage                                      | 12             | Vdc                     |     | HVMOSFET VDS Rating                    | 580                |        | V   |     | LP_initial                | 8.980068738378601e-05 | H   |                                          |     |     |     |     |
| 14 | Maximum Output Load Current                                   | 5.142          | A                       |     | HVMOSFET COSS                          | 282.07240555218704 |        | pF  |     | IDRV_initial              | 3.568187314353385     | A   |                                          |     |     |     |     |
| 15 | Output Over-Voltage Threshold                                 | 14             | Vdc                     |     | HVMOSFET CISS                          | 5000               |        | pF  |     | LP_initial2A              | 8.980068738378601e-05 | H   |                                          |     |     |     |     |
| 16 | Output Ripple Voltage                                         | 0.24           | VPEAK-PEAK              |     | Minimum Peak Drain Current Rating      | 8.032128514056225  |        | A   |     | LP_initial2               | 8.980068738378601e-05 | H   |                                          |     |     |     |     |
| 17 |                                                               |                |                         |     | RMS Drain Current                      | 1.6383878358138602 |        | A   |     | tON_initial2              | 4.368355759130497e-06 | s   | worstcase on-time assuming 10% higher Lp |     |     |     |     |
| 18 | OVER-CURRENT AND BROWN-OUT FAULT RESPONSE                     |                |                         |     | OUTPUT CAPACITOR                       |                    |        |     |     | LP1                       | 8.980068738378601e-05 | H   |                                          |     |     |     |     |
| 19 | Fault Response                                                | SHUTDOWN/RETRY | SHUTDOWN/RETRY SELECTED |     | Minimum Output Ripple Current Rating   | 8.534277356748168  |        | A   |     | LPtarget                  | 8.980068738378601e-05 | H   |                                          |     |     |     |     |
| 20 |                                                               |                |                         |     | Maximum Output Capacitor ESR           | 9.193807951432651  |        | mW  |     | tONmax                    | 4.325104712010393e-06 | s   |                                          |     |     |     |     |
| 21 |                                                               |                |                         |     | Minimum Output Capacitance             | 280.804146832796   |        | mF  |     |                           |                       |     |                                          |     |     |     |     |
| 22 |                                                               |                |                         |     |                                        |                    |        |     |     |                           |                       |     |                                          |     |     |     |     |



min_row: 2
max_row: 22
min_col: 2
max_col: 18
target_cell_row_idx: 12
target_cell_col_idx: 12
target_cell_value: 3.4934210526315795e-06
formula: =((Vout+0.7)*Nps*((1/(fswmax*10^3))-(0.5*10^-6)))/(Vbulk_min+((Vout+0.7)*Nps))