100W System-Level Power Reference Design for Automotive Infotainment System

(ACTIVE) PMP10749

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Key Document

Description

PMP10749 is a 100-W system-level SMPS design for a higher-power automotive infotainment system. The design has protections, such as load dump through TVS (ISO pulse testing), as well as reverse voltage (innovative smart diode with very low Iq) protection. Furthermore, all the controllers (boost and dual bucks) are in SYNC for EMI-optimized design.


The design is divided into four major blocks:

  1. Protection: Reverse battery protection through efficient smart diode and automotive transient protections through TVS.
  2. EMI filter: 14-A common modes choke at front end with a differential filter for conducted EMI suppression.
  3. Preboost: Highly efficient synchronous preboost design for 100-W application. The output is maintained at 10 V and when Vin > Vout , the output follows the input and true bypass operation is achieved.
  4. Dual buck controller: 2.2-MHz switching for AM band avoidance, as well as small size solution. Supports two outputs: 5 V at 10 A, as well as 3.3 V at 10 A. The syncout of controller is used to sync boost at F/10 frequency.

 

Features
  • 2.2-MHz switching for SYNC buck controller – avoid AM band + smaller size
  • Wide Vin support for automotive application
  • Cycle-by-cycle current limit and optional hiccup-mode overload protection
  • Low-cost and high-efficiency solution for 100-W application
  • Smart diode for highly efficient reverse battery protection

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Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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Parametrics
 PMP10749.1
(Output Voltage 1)
PMP10749.2
(Output Voltage 2)
PMP10749.3
(Output Voltage 3)
Vin (Min) (V)41010
Vin (Max) (V)323232
Vout (Nom) (V)103.33.3
Iout (Max) (A)101010
Output Power (W)1003333
Isolated/Non-IsolatedNon-IsolatedNon-IsolatedNon-Isolated
Input TypeDCDCDC
TopologyBoost- SynchronousBuck- SynchronousBuck- Synchronous

TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CD74HC4017  High Speed CMOS Logic Decade Counter/Divider with 10 Decoded Outputs  Specialty logic  Sample & Buy Not Available
LM5122-Q1  Automotive Grade, 3-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capabili  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
LM5140-Q1  Wide Vin Dual 2.2MHz low Iq Synchronous Buck Controller  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LM74610-Q1  Zero Iq Reverse Polarity Protection Smart Diode Controller  Power switches  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CD74HC4017 Download -
Download Download
Download Download
Download Download
LM5122-Q1 Download
LM5140-Q1 Download Download
LM74610-Q1 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 6708 21 Mar 2016 7
Design files (5)
Title Abstract Type Size (KB) Date Views
ZIP 454 21 Mar 2016 6
ZIP 1778 21 Mar 2016 5
PDF 25 21 Mar 2016 5
PDF 611 21 Mar 2016 7
PDF 495 21 Mar 2016 7

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