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:
|    | A   | B                                                                                            | C                  | D   | E                                                                                                                                                                                                                                                                                                                                                                    | F   | G   | H   | I   | J   | K   | L   | M   |
|---:|:----|:---------------------------------------------------------------------------------------------|:-------------------|:----|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:----|:----|:----|:----|:----|:----|:----|:----|
| 20 |     | Minimum Line Frequency, fLINEmin =                                                           | 47                 | Hz  | For universal line enter 47 Hz                                                                                                                                                                                                                                                                                                                                       |     |     |     |     |     |     |     |     |
| 21 |     | Minimum Input Voltage for Start-Up, VINPUTrun =                                              | 85                 | VAC |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 22 |     |                                                                                              |                    |     |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 23 |     | OUTPUT SPECIFICATIONS                                                                        |                    |     |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 24 |     | Regulated Output Voltage, Constant Voltage Mode, VOUT_CV =                                   | 3.3                | VDC |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 25 |     | Full Load Rated Output Current, IOUT =                                                       | 3.3                | A   |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 26 |     | Target Constant Current Mode Output Load Threshold, IOCC =                                   | 3.5                | A   |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 27 |     | Target Minimum Output Voltage During Constant Current Regulation, VOUT_CC =                  | 3.15               | VDC |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 28 |     | Allowable Output Voltage Drop During Load-Step Transient in Constant Voltage Mode, VOUTΔ =   | 0.05               | V   |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 29 |     | Maximum Peak to Peak Output Voltage Ripple, VRIPPLE =                                        | 80                 | mV  |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 30 |     | Maximum Desired Switching Frequency, User must input value not greater than 100 kHz,  fmax = | 70                 | kHz | [Target Cell]                                                                                                                                                                                                                                                                                                                                                        |     |     |     |     |     |     |     |     |
| 31 |     | Output Over Voltage Protection, VOUT_OVP =                                                   | 3.55               | V   |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 32 |     | Required Positive Load Step Transient Current, ITRAN =                                       | 3                  | A   |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 33 |     | Maximum Allowable Response Time to Load Step Transient, tRESP =                              | 20                 | ms  |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 34 |     | Target Maximum Stand By Power Dissipation, PSBtarget =                                       | 20                 | mW  |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 35 |     |                                                                                              |                    |     |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 36 |     | COMPONENT SELECTION USER INPUTS                                                              |                    |     |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 37 |     | COMPONENT                                                                                    | PARAMETER          |     | COMMENT                                                                                                                                                                                                                                                                                                                                                              |     |     |     |     |     |     |     |     |
| 38 |     | Input Capacitor, CBULK                                                                       |                    |     |                                                                                                                                                                                                                                                                                                                                                                      |     |     |     |     |     |     |     |     |
| 39 |     | Desired Minimum Valley Voltage, VBULKvalley_desired =                                        | 85                 | V   | Used to determine the required input bulk capacitor at minimum line, full load. For DC input, use VINPUTrun                                                                                                                                                                                                                                                          |     |     |     |     |     |     |     |     |
| 40 |     | Recommended Input Bulk Capacitance, CBULK =                                                  | 31.887285577560178 | µF  | Using a value less than recommended will result in a minimum valley voltage less than desired, requiring a larger power stage to accommodate the higher currents due to the lower input rail.  Using a value larger than recommended will result in a higher input rail and lower currents on the power stage but higher peak current in the input capacitor itself. |     |     |     |     |     |     |     |     |



min_row: 20
max_row: 40
min_col: 1
max_col: 13
target_cell_row_idx: 30
target_cell_col_idx: 5
target_cell_value: None
formula: =IF(fmax_target>100,"Desired switching frequency must be lower than 100 kHz",IF(fmax_target<0.17,"Desired switching frequency must be higher than 170 Hz",""))