This reference design is a 100-W synchronous buck converter to supply automotive loads. The IC is LM5146-Q1 in fixed frequency operation at 100 kHz to ensure low noise operation. This IC (LM5146-Q1) is designed for automotive with the ability to handle load dump for truck applications. A resistor-capacitor (RC) snubber attenuates noise in the RF band to reduce radiated emissions. To reduce system EMI, the design is prepared to either synchronize other converters (output) or be externally synchronized (input).
| Output voltage options | PMP30600-TH.1 |
|---|---|
| Vin (Min) (V) | 10 |
| Vin (Max) (V) | 36 |
| Vout (Nom) (V) | 5 |
| Iout (Max) (A) | 20 |
| Output Power (W) | 100 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Buck- Synchronous |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Test results for the reference design, including efficiency graphs, test prerequisites and more
Detailed schematic diagram for design layout and components
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | 20-A Automotive Pre-Regulator Reference Design With Extended Input Voltage Range | Sep. 20, 2019 |
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