TIDA-00744

50W System-Level Power Reference Design for Automotive Infotainment Systems

TIDA-00744

Design files

Overview

TIDA-00744 is a 50-W system-level SMPS design for mid-power automotive infotainment systems.
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 TVSs
  2. EMI filter: A differential filter for conducted EMI suppression
  3. Preboost: Efficient low-cost nonsynchronous preboost design for 50-W applications. The output is maintained at 10 V and when Vin > Vout (programmed boost out), the output follows the input and bypass operation is achieved (through a conducting PFET when VIN > programmed 10-V boost output).
  4. Dual buck controller: 2.2-MHz switching for AM band avoidance, as well as small-size solution. Supports two outputs; 5 V at 5 A and 3.3 V at 5 A. The syncout of controller is used to sync boost at F/9 frequency.

Features
  • Lossless bypass operation, avoids loss in boost diode
  • Wide Vin support for automotive application
  • Cycle-by-cycle current limit and optional hiccup-mode overload protection
  • Low-cost solution and high-efficiency solution for 50-W application
  • Smart diode for highly efficient reverse battery protection
Output voltage options TIDA-00744.1 TIDA-00744.2 TIDA-00744.3
Vin (Min) (V) 4 10 10
Vin (Max) (V) 32 32 32
Vout (Nom) (V) 10 3.3 3.3
Iout (Max) (A) 5 5 5
Output Power (W) 50 16.5 16.5
Isolated/Non-Isolated Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC DC
Topology Boost- Synchronous Buck- Synchronous Buck- Synchronous
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUBN0.PDF (10150 K)

Reference design overview and verified performance test data

TIDRKU1.PDF (450 K)

Detailed schematic diagram for design layout and components

TIDRKU2.PDF (617 K)

Detailed schematic diagram for design layout and components

TIDRKU3.PDF (28 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRKU8.ZIP (1537 K)

Files used for 3D models or 2D drawings of IC components

TIDCBX8.ZIP (640 K)

Design file that contains information on physical board layer of design PCB

Products

Includes TI products in the design and potential alternatives.

Boost controllers (external switch)

LM3481-Q12.97-V to 48-V high-efficiency controller for boost, SEPIC and flyback, AEC-Q100 qualified

Data sheet: PDF | HTML
Buck controllers (external switch)

LM5140-Q1Wide Vin Dual 2.2MHz low Iq Synchronous Buck Controller

Data sheet: PDF | HTML
Counters

CD74HC4017High Speed CMOS Logic Decade Counter/Divider with 10 Decoded Outputs

Data sheet: PDF
Ideal diode/ORing controllers

LM74610-Q10.48-V to 42-V, zero IQ automotive ideal diode controller

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide TIDA-00744 Test Results Mar. 21, 2016

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