Product Series: 3847
3847
30 Watt Proton Rad Hard 100K+ DC-DC Booster Converter
Features
- RadHard TID >100kRad(Si)
- 2:1 Margin: Operates beyond 200kRad TID
- No SEE: LET > 82meV*cm^2/mg
- Power on soft start
- Fully hermetic package
Specifications
- Input: 12 VDC to VDC
- Input Range (Continuous): 9 VDC to 20 VDC
- Input Range (Full Power): 8 VDC to 20 VDC
- Isolation Input to Case: 500 VDC to VDC
- Isolation Output to Case: 100 VDC to VDC
- Storage Temp: -65 to +150
- Shock: 50 to
- Acceleration: 500 to
- Vibration: 30 to
- Weight: 60 to
Environment
- Grade L:
- Full Output Power at Tcase = 85°C
- Minimum Output Power at Tcase = -55°C
- Linearly derates to zero at Tcase = 115
- Grade L:
- TID up to 45kRad(Si)
- No SEE up to 60MeV*cm2/mg
- Grade S:
- Full Output Power at Tcase = 85°C
- Minimum Output Power at Tcase = -55°C
- Linearly derates to zero at Tcase = 115
- Grade S:
- TID up to 100kRad(Si)
- No SEE up to 60MeV*cm2/mg
- Grade LE:
- Full Output Power at Tcase = 125°C
- Minimum Output Power at Tcase = -55°C
- Linearly derates to zero at Tcase = 135
- Grade LE:
- TID up to 45kRad(Si)
- No SEE up to 60MeV*cm2/mg
- Grade SE:
- Full Output Power at Tcase = 125°C
- Minimum Output Power at Tcase = -55°C
- Linearly derates to zero at Tcase = 135
- Grade SE:
- TID up to 100kRad(Si)
- No SEE up to 60MeV*cm2/mg
- Grade EU:
- Full Output Power at Tcase = 85°C
- Minimum Output Power at Tcase = -55°C
- Linearly derates to zero at Tcase = 115
- Grade EU:
- TID up to kRad(Si)
- No SEE up to 60MeV*cm2/mg
Additional Notes
The 3847 is a Rad Hard non-isolated Booster with a 9VDC to 20 VDC input and a 28VDC output with 30W capability. Model 3847 is a modern GaN design specifically for cubesat, commercial space and traditional space applications. It features high efficiency and short circuit protection, packaged in a 1.35″ by 2.2″ flanged case.
Unlike simple DC-DC boosters which allow unlimited current when the output voltage is less than the input voltage, Model 3847 contains an internal FET that opens the input/output connection when the output voltage is less than the input voltage. This feature no only provides short circuit protection but also allows the output to be inhibited when commanded.
Single Output Devices
Toggle Columns: Parameter - Conditions
| Parameters | Conditions | 3847-S28 (30W) | ||
|---|---|---|---|---|
| 3847-S28 (30W) MIN | 3847-S28 (30W) TYP | 3847-S28 (30W) MAX | ||
| Output set voltage | — | 27.8 | 28 | 28.2 |
| Output current | Vin min — Vin max | — | — | 1.0A |
| Efficiency | Pout = max rated load | 89 | 92 | — |
| Line regulation | Pout = max rated load Vin min — Vin max |
— | 50mV | 250mV |
| Load regulation | Pout = 10% to F.L. | — | 50 mV | 250mV |
| Output ripple | F.L. BW 2 MHz mVpp |
— | 150 | 350 |
| Input Current (@12V) | Inhibited | — | 37mA | — |
Pinout Table
| 3847 |
|---|
| Pin-1: Soft Start |
| Pin-2: Inhibit - NOT |
| Pin-3: N/C |
| Pin-4: N/C |
| Pin-5: N/C |
| Pin-6: Adjust Return |
| Pin-7: Adjust |
| Pin-8: V Output |
| Pin-9: Output Return |
| Pin-10: V Input Return |
| Pin-11: V Input |
| Pin-12: case |
Case Styles
| Part Number Designator | Case Style | Pin Count | Mounting | Step File |
|---|---|---|---|---|
| 2 | Case Style 2 | 12 | Solder Sealed Flangelss PCB Mount | Download |
| F – 10 Pin | Case Style 3 | 10 | Solder Sealed Flanged PCB Mount | Download |
| I | Case Style 5 | 12 | Seam Weld Flangeless PCB Mount | Download |
| IF | Case Style 6 | 12 | Seam Weld Flanged PCB Mount | Download |
| WF | Case Style 8 | 12 | Seam Weld Flanged Chassis Mount | Download |
| PB | Case Style 10 | 12 | Solder Sealed PCB Stud Mount | Download |
| PE | Case Style 12 | 12 | Seam Weld Stud PCM Mount | Download |
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