20-A automotive pre-regulator reference design
Description
This reference design is a 100-W synchronous buck converter to supply automotive loads. The IC is LM5146-Q1 in fixed frequency operation at 250 kHz to ensure low noise operation. 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).
Features
- Power stage withstands surge voltages up to 36 VpkEfficiency higher than 95% over a output current range of 5-A to 20-A (at 14-V input voltage)Tight load regulation results in a low deviation (5 mV) of the output voltage over the whole range of the input voltageInput filter for minimizing conducted emissions is included
Applications
- Automotive radio tuner
- Automotive active noise cancellation
- Automotive head unit
- Automotive external amplifier
- Rear seat entertainment
- Telematics control unit
- Automotive USB charge
- Head-up display
- Voltage conditioning module
- Automotive media hub
- Intelligent antenna module
- Emergency call (eCall)
- Vehicle to everything (V2X)
- Automotive auxiliary display
- Aftermarket head unit
- Automotive cluster display
- Smart telematics gateway
Product Categories
- Power management