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LM51551 - 2.2-MHz Wide Input Nonsynchronous Boost Flyback Controller

Download the LM51551 datasheet PDF. This datasheet also covers the LM5155 variant, as both devices belong to the same 2.2-mhz wide input nonsynchronous boost flyback controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The LM5155x ( LM5155 and LM51551 ) device is a wide input range, non-synchronous boost controller that uses peak current mode control.

The device can be used in boost, SEPIC, and flyback topologies.

Key Features

  • 1 Functional safety capable.
  • Documentation available to aid functional safety system design.
  • Wide Input Operating Range for Battery.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM5155-etcTI.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number LM51551
Manufacturer Texas Instruments
File Size 1.67 MB
Description 2.2-MHz Wide Input Nonsynchronous Boost Flyback Controller
Datasheet download datasheet LM51551 Datasheet

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Other Datasheets by Texas Instruments

Part Number Description
LM51551-Q1 2.2-MHz Wide Input Nonsynchronous Boost Flyback Controller
LM5155 2.2-MHz Wide Input Nonsynchronous Boost Flyback Controller
LM5155-Q1 2.2-MHz Wide Input Nonsynchronous Boost Flyback Controller
LM5150-Q1 Wide VIN Automotive Boost Controller
LM51501-Q1 Wide VIN Automotive Boost Controller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
Product Folder Order Now Technical Documents Tools & Software Support & Community LM5155, LM51551 SNVSB75B – DECEMBER 2018 – REVISED JANUARY 2020 LM5155x 2.2-MHz Wide Input Nonsynchronous Boost, SEPIC, Flyback Controller 1 Features •1 Functional safety capable – Documentation available to aid functional safety system design • Wide Input Operating Range for Battery Applications – 3.5-V to 45-V Operating Range – 2.97-V to 16-V When BIAS = VCC – Minimum Boost Supply Voltage 1.5 V When BIAS ≥ 3.5 V – Input Transient Protection up to 50 V • Minimized Battery Drain – Low Shutdown Current ( IQ ≤ 2.6 µA ) – Low Operating Current ( IQ ≤ 480 µA ) • Small Solution Size and Low Cost – Maximum Switching Frequency of 2.