3834
This DC-DC Converter is recommended for space applications requiring good efficiency at low power as well as a small package size.
Features
- Efficiency optimized for lower power applications
- GaN switching transistor at fixed 250 kHz for low ripple
- No SEE: LET > 82meV*cm^2/mg
- Magnetically coupled regulation
- Inhibit-not function
Specifications
- Input: 12 VDC to VDC
- Input Range (Continuous): 9 VDC to 20 VDC (START)
- Input Range (Full Power): 8 VDC to 20 VDC (RUN)
- Isolation Input to Case: 500 VDC to VDC
- Isolation Input to Output: 500 VDC to VDC
- Isolation Output to Case: 500 VDC to VDC
- Storage Temp: -65 °C to 150 °C
- Shock: to MIL-STD-810 Method 516.5 Procedure III
- Acceleration: to MIL-STD 883 Method 2001, test condition A1, Y1 direction, 500G's
- Vibration: to MIL-STD-883 Method 2026, test condition 2H
- Weight: 18 gms typical to gms typical
Environment
- 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
- 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
Additional Notes
To operate converter, open inhibit-not pin
To inhibit converter, connect inhibit-not pin to input return
If needed use EMI Filter MDI Model 3747 available separately
Single Output Devices
| Parameters | Conditions | 3834-S3.3 (2W) | 3834-S05 (2W) | 3834-S12 (2W) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| MIN | TYP | MAX | MIN | TYP | MAX | MIN | TYP | MAX | ||
| Output set voltage | — | +3.15 | +3.3 | +3.45 | +4.8 | +5 | +5.2 | +11.8 | +12 | +12.2 |
| Output current | Vin min — Vin max | 0.06A | — | 0.6A | 0.04 | — | 0.4A | 0.017 | — | 0.170A |
| Efficiency | Pout = max rated load | 66% | 69% | — | 71% | 74% | — | 75% | 78% | — |
| Line regulation | Pout = max rated load Vin min — Vin max |
— | 100mV | 200mV | — | 110mV | 200mV | — | 200mV | 350mV |
| Load regulation | Pout = 10% to F.L. | — | 100mV | 200mV | — | 100mV | 200mV | — | 150mV | 300mV |
| Output ripple | F.L. BW 2 MHz mVpp |
— | 30 | 50 | — | 30 | 50 | — | 60 | 120 |
| Parameters | Conditions | 3834-S15 (2W) | 3834-S28 (2W) | ||||
|---|---|---|---|---|---|---|---|
| MIN | TYP | MAX | MIN | TYP | MAX | ||
| Output set voltage | — | +14.8 | +15 | +15.2 | 27.7V | 28V | 28.3V |
| Output current | Vin min — Vin max | 0.013 | — | 0.133 | 0.007A | - | 0.071A |
| Efficiency | Pout = max rated load | 75% | 78% | — | 75% | 78% | — |
| Line regulation | Pout = max rated load Vin min — Vin max |
— | 200mV | 400mV | — | 400mV | 700mV |
| Load regulation | Pout = 10% to F.L. | — | 200mV | 400mV | — | 400mV | 700mV |
| Output ripple | F.L. BW 2 MHz mVpp |
— | 70 | 150mV | — | 180mV | 300mV |
Dual Output Devices
| Parameters | Conditions | 3834-D05 (2W) | 3834-D12 (2W) | 3834-D15 (2W) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| MIN | TYP | MAX | MIN | TYP | MAX | MIN | TYP | MAX | ||
| Output set voltage | +lout = -lout+ | +4.8 -4.8 |
+5.0 -5.0 |
+5.2 -5.2 |
+11.8 -11.8 |
+12.0 -12.0 |
+12.2 -12.2 |
+14.8 -14.8 |
+15.0 -15.0 |
+15.2 -15.2 |
| Output current | Vin min — Vin max | 0.02A | — | 0.2A | 0.008A | — | 0.083A | 0.007A | — | 0.067A |
| Efficiency | Pout = max rated load | 71% | 74% | — | 75% | 78% | — | 75% | 78% | — |
| Line regulation | Pout = max rated load Vin min — Vin max |
— | ±110mV | ±200mV | — | ±200mV | ±350mV | — | ±200mV | ±400mV |
| Load regulation | Pout = 10% to F.L. | — | ±100mV | ±200mV | — | ±150mV | ±300mV | — | ±200mV | ±400mV |
| Output ripple | F.L. BW 2 MHz mVpp |
— | 30mV | 50mV | — | 60mV | 120mV | — | 70mV | 150mV |
Pinout Table
| 3834-SXX | 3834-DXX |
|---|---|
| Pin-1: +12VDC Input | Pin-1: +12VDC Input |
| Pin-2: +12VDC Input Rtn | Pin-2: +12VDC Input Rtn |
| Pin-3: Output Pos | Pin-3: Output Pos |
| Pin-4: Output Rtn | Pin-4: Output Rtn |
| Pin-5: Case | Pin-5: Case |
| Pin-6: N/C | Pin-6: Output Neg |
| Pin-7: Inhibit-not | Pin-7: Inhibit-not |
Case Styles
| Part Number Designator | Case Style | Pin Count | Mounting | Step File |
|---|---|---|---|---|
| MN | Case Style 16 | 7 | Seam Weld Flangeless PCB Mount | — |
