CISPR 25 Class 5 Rated Multi-Output Power Supply with Pre-Boost for Automotive Cluster Unit

(ACTIVE) PMP9477

Description & Features

Technical Documents

Support & Training

Order Now


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


Description

The PMP9477 design is a conducted EMI optimized multi-output power supply for automotive cluster units.  The power supply has a pre-boost stage for cold crank and start-stop operation and two buck regulators.  The pre-boost stage features the LM3481 boost controller and will start to operate and regulate a 9.5V output when the input voltage drops below 9.5V.  It makes the design a wide input voltage range of 4.5V to 38V suitable for 12V automotive battery systems.  The design has two buck regulators following the pre-boost to generate 3 output voltages: the first stage buck generates a 5V, 2A output using the LM26003, and the second stage generates two outputs of 2.8V, 2A and 1.8V, 2A using the LM26420 (the max output power is 15W).  The LM26003 is a wide Vin non-synchronous buck regulator, and the LM26420 is a 5V input dual 2A, high frequency synchronous buck regulator.  All three ICs are available in automotive grade versions, qualified in AEC-Q100 Grade 1.  The board layout is optimized for improved conducted EMI performance.  The power inductor in the pre-boost stage is utilized as an input EMI filter, and thus no additional filter components are required.  The board is tested under the automotive EMC standard, CISPR 25, and its conducted emissions are in compliance with the CISPR 25 Class 5 requirements.

Features
  • Conducted EMI optimized PCB layout, no extra filter components needed
  • In compliance with the CISPR 25 Class 5 conducted emissions standard
  • 4.5V to 38V wide Vin range with pre-boost stage
  • LM3481, LM26003 and LM26420 are all available in AEC-Q100 qualified versions
  • Power enable/shutdown configurable via the jumper
  • Circuit board is tested, and the design files and test report are included

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


  




Parametrics
 PMP9477.1
(Output Voltage 1)
PMP9477.2
(Output Voltage 2)
PMP9477.3
(Output Voltage 3)
Vin (Min) (V)4.54.54.5
Vin (Max) (V)383838
Vout (Nom) (V)2.81.85
Iout (Max) (A)222
Output Power (W)5.63.610
Isolated/Non-IsolatedNon-IsolatedNon-IsolatedNon-Isolated
Input TypeDCDCDC
TopologyBuck- Integrated SwitchBuck- Integrated SwitchBuck- Non Sync

TI Devices (3)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM26003  3A Switching Regulator with High Efficiency Sleep Mode  Step-Down (Buck)  Sample & Buy View Design Kits & Evaluation Modules
LM26420  Dual 2.0A, High Frequency Synchronous Step-Down DC-DC Regulator  Step-Down (Buck)  Sample & Buy View Design Kits & Evaluation Modules
LM3481  High-Efficiency Controller for Boost, SEPIC and Flyback DC-DC Converters  Step-Up (Boost)  Sample & Buy View Design Kits & Evaluation Modules

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
PDF 1383 16 Oct 2014 99
Design files (4)
Title Abstract Type Size (KB) Date Views
ZIP 211 16 Oct 2014 93
PDF 1399 16 Oct 2014 49
PDF 396 16 Oct 2014 46
PDF 335 16 Oct 2014 144


Support & Training

TI E2E Community

As a member of  myTI you can join the TI E2E™ Community  where you can ask questions, share ideas and collaborate with fellow engineers and TI experts

Content is provided "AS IS" by the respective TI and Community contributors and does not constitute TI specifications. See  Terms of use.

Engage in the Community

Blogs

Wikis

Visit the TI Wiki