20W isolated DC-DC converter Wide input and regulated single output
20W isolated DC-DC converter Wide input and regulated single output
Descriptions
VCB48_SBO-20WR3 series are isolated 20W DC-DCconverter products with a 2:1 input voltage range.They feature efficiencies of up to 90%, 150VDC input to output isolation,operating temperature of -40C to +85C,input under-voltage protection,output over-curent,
short-circut,over-voltage protection,which is widely used in communication field, such as switches,repeaters,inteligent communication gateways, GPS synchronous clock and 4G/5G base station etc.
FEATURES
- Wide 2: 1 input voltage range
- High efficiency up to 90%
- I/O isolation test voltage 1.5K VDC
- Input under-voltage protection, output
- over-current, short-circuit, over-voltage protection
- Operating ambient temperature range: -40C to +85C
- Industry standard 1/ 16 brick, complies with DOSA standard
Specifications
| Selection Guide | |||||||
| Certification | Part No. | Input Voltage (VDC) | Output |
Full Load Efficiency② (%) Min./Typ. |
Max. Capacitive Load(µF) |
||
| Nominal (Range) |  Max. |
Voltage (VDC) |
Current(mA) Max./Min. |
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|
EN |
VCB4803SBO-20WR3 |
48 (36-75) |
80 |
3.3 | 5000/0 | 84/86 | 7200 |
| VCB4805SBO-20WR3 | 5 | 4000/0 | 86/88 | 7200 | |||
| VCB4812SBO-20WR3 | 12 | 1667/0 | 87/89 | 1600 | |||
| VCB4815SBO-20WR3 | 15 | 1333/0 | 87/89 | 1000 | |||
| VCB4824SBO-20WR3 | 24 | 833/0 | 88/90 | 470 | |||
| VCB4828SBO-20WR3 | 28 | 714/0 | 88/90 | 470 | |||
|
Notes: ① Exceeding the maximum input voltage may cause permanent damage; ② Efficiency is measured at nominal input voltage and rated output load. |
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| Input Specifications | |||||
| Item | Operating Conditions | Min. | Typ. | Max. | Unit |
| Input Current (full load / no load) | Nominal input voltage | -- | 474/ 15 | 485/30 |  A |
| Reflected Ripple Current | -- | 50 | -- | ||
| Surge Voltage (1sec. max.) | -0.7 | -- | 100 |
VDC |
|
| Start-up Voltage | -- | -- | 36 | ||
| Under-voltage Protection | 26 | 29 | -- | ||
| Start-up Time | Nominal input voltage & constant resistance load | -- | -- | 100 | ms |
| Input Filter | C filter | ||||
| Hot Plug | Unavailable | ||||
|
Ctrl* |
Module on | Ctrl pin open or pulled high (TTL 3.5- 12VDC) | |||
| Module off | Ctrl pin pulled low to GND (0- 1.2VDC) | ||||
| Input current when off | -- | 6 | 10 |  A |
|
| Note: *The Ctrl pin voltage is referenced to input GND. | |||||
| Output Specifications | ||||||
| Item | Operating Conditions | Min. | Typ. | Max. | Unit | |
| Voltage Accuracy | 5%- 100% load | -- | ± 1 | ±3 |
% |
|
| Linear Regulation | Input voltage variation from low to high at full load | -- | ±0.2 | ±0.5 | ||
| Load Regulation① | 5%- 100% load | -- | ±0.5 | ± 1 | ||
| Transient Recovery Time | 25% load step change, nominal input voltage | -- | 300 | 500 | µs | |
| Transient Response Deviation | 25% load step change, nominal input voltage | 3.3V, 5V output | -- | ±5 | ±8 | % |
| Others | -- | ±3 | ±5 | |||
| Temperature Coefficient | Full load | -- | -- | ±0.03 | %/C | |
| Ripple & Noise② | 20MHz bandwidth, 5%- 100% load | -- | 100 | 150 | mV p-p | |
| Trim | 90 | -- | 110 |
%Vo |
||
|
Output Voltage Remote Compensation(sense) |
-- | -- | 105 | |||
| Over-voltage Protection |
Input voltage range |
1 10 | -- | 160 | ||
| Over-current Protection | 1 10 | 140 | 190 | %Io | ||
| Short-circuit Protection | Continuous, self-recovery | |||||
|
Note: ①Load regulation for 0%- 100% load is ±3%; ②Ripple & Noise at < 5% load is 5%Vo max. The ”parallel cable” method is used for ripple and noise test, please refer to DC-DC ConverterAplicationNotesfor specific information. |
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| General Specifications | |||||
| Item | Operating Conditions | Min. | Typ. | Max. | Unit |
| Isolation | Input-output Electric Strength Test for 1 minute with a leakage current of 1mA max | 1500 | -- | -- | VDC |
| Insulation Resistance | Input-output resistance at 500VDC | 1000 | -- | -- | MQ |
| Isolation Capacitance | Input-output capacitance at 100KHz/0. 1V | -- | 1000 | -- |  F |
| Operating Temperature | See Fig. 1 | -40 | -- | +85 | C |
| Storage Temperature | -55 | -- | + 125 | ||
| Storage Humidity | Non-condensing | 5 | -- | 95 | %RH |
| Vibration | 10- 150Hz, 5G, 0.75mm. along X, Y and Z | ||||
| Switching Frequency* | PWM mode | -- | 230 | -- | KHz |
| MTBF | MIL-HDBK-217F@25C | 1000 | -- | -- | K hours |
| Note:*Switching frequency is measured at full load. The module reduces the switching frequency for light load (below 50%) efficiency improvement. | |||||
| Mechanical Specifications | |
| Dimensions | 33.02 × 22.86 × 12.60mm |
| Weight | 8.2g (Typ.) |
| Cooling Method | Free air convection |
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