This reference design shows a complete power tree for automotive infotainment systems. The LM74700-Q1 provides reverse battery protection to the system and provides immunity to automotive transients specified in ISO 7637-2 and ISO 16750-2. The pre-booster with LM5150-Q1 provides a stable supply voltage of 10.5V during cranking for the dual-synchronous buck converter with LM5140-Q1, that provides an output voltage of 3.3V for a load current of 6.0A and an output voltage of 7.5V for a load current of 2.5A.
| Output voltage options | PMP30267.1 | PMP30267.2 | PMP30267.3 |
|---|---|---|---|
| Vin (Min) (V) | 3.2 | 10.5 | 10.5 |
| Vin (Max) (V) | 40 | 40 | 40 |
| Vout (Nom) (V) | 10.5 | 3.3 | 7.5 |
| Iout (Max) (A) | 1.5 | 6 | 2.5 |
| Output Power (W) | 15.75 | 19.8 | 18.75 |
| Isolated/Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated |
| Input Type | DC | DC | DC |
| Topology | Boost- Non Sync | Buck- Synchronous | Buck- Synchronous |
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | Automotive Power Reference Design for Infotainment Systems (Rev. A) | Oct. 01, 2019 |
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