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Overview
| Topology | Buck Converter |
| Input voltage | 20-40 V |
| Output 1 | 5 V / 10 A |
Description
The UC1843B-SP EVM uses the UC1843B-SP, INA901-SP, LM139AQML-SP, and UC1901-SP to create an isolated feedback flyback with current sensing and overcurrent flags. The UC1843B-SP is used to switch the low side MOSFET of the flyback converter and provides voltage and current to the output. The system uses the UC1843B-SP to provide 5-V and 10-A outputs. These outputs are not dependent on the UC1843B-SP itself, and can be increased or decreased depending on the design. The INA901-SP senses the input current which is then provided to the LM139AQML-SP to create an overcurrent flag. In a full system, this flag could be used to shutdown the UC1843B-SP and turn off the converter.
Features
- Pulse-by-pulse current limiting using UC1843B-SP
- PWM control using UC1843B-SP
- Current sensing using INA901-SP
- Overcurrent comparison using LM139AQML-SP
Typical applications
- Radiation hardened applications
- Space satellite isolated power supplies, Space satellite payloads
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | Q | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 885012006057 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 100 pF | ±5% | 50 | 0603 | -55 °C up to +125 °C | 1000 | – | 10 GΩ | NP0 Class I | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | ||
| 885012206081 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 470 pF | ±10% | 50 | 0603 | -55 °C up to +125 °C | – | 2.5 | 10 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | ||
| 885012206048 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 16 V(DC) | 220 nF | ±10% | 16 | 0603 | -55 °C up to +125 °C | – | 5 | 2.3 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | ||
| 750317433 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 885012006057 | SPEC | |
| 885012206081 | SPEC | |
| 885012206048 | SPEC | |
| 750317433 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | Q | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | Samples |
|---|