20-A automotive pre-regulator reference design
PMP30600-AH
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Key Document

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 Vpk
  • Efficiency 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 voltage
  • Input filter for minimizing conducted emissions is included

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Design Files

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Parametrics
 PMP30600-AH.1
(Output Voltage 1)
Vin (Min) (V)6
Vin (Max) (V)18
Vout (Nom) (V)5
Iout (Max) (A)20
Output Power (W)100
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBuck- Synchronous

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5146-Q1  Automotive 100-V synchronous buck DC/DC controller with wide duty-cycle range  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5146-Q1 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1999 13 Aug 2019
Design files (6)
Title Type Size (KB) Date
ZIP 62 13 Aug 2019
ZIP 561 13 Aug 2019
PDF 862 13 Aug 2019
PDF 105 13 Aug 2019
PDF 137 13 Aug 2019
PDF 114 13 Aug 2019
Related Tools & Software

Reference Designs (3)


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