15-W System-Level Power Reference Design for Automotive Body Control Module

(ACTIVE) TIDA-00745

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Key Document

Description

TIDA-00745 is a 14-W system-optimized (CISPR25 Class 4) SMPS design for an automotive body control module. All buck converters used in this design are switching at 2.1 MHz. 

The design is divided into four major blocks:

  1. EMI filter: Common mode and a differential filter for conducted EMI suppression
  2. Preboost (TPS40210-Q1): Efficient low-cost nonsynchronous preboost design for 15-W application. The output is maintained at 7.5 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 7.5-V boost output). 
  3. Buck converters (LM53603-Q1, LM53601-Q1, and LM26420-Q1): All converters switch at 2.1 MHz for AM band avoidance and having a small size solution. LM53603-Q1 and LM53601-Q1 are at the front end and both are synchronous wide Vin automotive buck converters with a high-level of integration. 
  4. Downstream LDOs with trackable output voltage

Features
  • Lossless bypass operation; avoid loss in boost diode
  • Wide Vin integrated front end DC/DC converters:  LM53603-Q1, LM53601-Q1
  • Pass CISPR 25 Class 3 FM radio band
  • ICs AEC-Q100 qualified
  • 3.5-V to 30-V (20-V OVP) wide Vin range; supports cold cranking conditions

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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
 TIDA-00745.1
(Output Voltage 1)
TIDA-00745.2
(Output Voltage 2)
TIDA-00745.3
(Output Voltage 3)
TIDA-00745.4
(Output Voltage 4)
TIDA-00745.5
(Output Voltage 5)
Vin (Min) (V)47.57.54.54.5
Vin (Max) (V)3232325.55.5
Vout (Nom) (V)7.5563.31.32
Iout (Max) (A)22.6511
Output Power (W)15103.93.31.32
Isolated/Non-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-Isolated
Input TypeDCDCDCDCDC
TopologyBoost- Non SyncBuck- SynchronousBuck- SynchronousBuck- SynchronousBuck- Synchronous

TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM53601-Q1  3.5V to 36V, 1A Synchronous 2.1MHz Step-Down Converter for Automotive Applications  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LM53603-Q1  3.5 to 36Vin, 3 Ampere Synchronous DC-DC Converter for Automotive Applications  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
TPS40210-Q1  Automotive 4.5V to 52V Wide Input Range Current Mode Boost Controller  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TPS7B4250-Q1  Automotive 50mA 40V Voltage-Tracking LDO With 5mV Tracking Tolerance  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS7B4253-Q1  Automotive 300mA 40V Voltage-Tracking LDO With 4mV Tracking Tolerance  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM53601-Q1 Download Download
LM53603-Q1 Download
LM74610-Q1 Download Download
TPS40210-Q1 Download -
TPS7B4250-Q1 Download Download
TPS7B4253-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 8368 23 Mar 2016 0
Design files (5)
Title Abstract Type Size (KB) Date Views
ZIP 495 13 Apr 2016 0
ZIP 1266 13 Apr 2016 0
PDF 25 13 Apr 2016 0
PDF 203 13 Apr 2016 0
PDF 399 13 Apr 2016 0

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