2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller
Product details
Parameters
Package | Pins | Size
Features
- 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 2.2 MHz
- 12-Pin WSON package (3 mm × 2 mm)
- Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
- Minimized undershoot during cranking (start-stop application)
- Higher efficiency with low-power dissipation
- 100-mV ±7% Low current limit threshold
- Strong 1.5-A peak standard MOSFET driver
- Supports external VCC supply
- Avoid AM band interference and crosstalk
- Optional clock synchronization
- Dynamically programmable switching frequency from 100 kHz to 2.2 MHz
- Integrated protection features
- Constant peak current limiting over input voltage
- Optional hiccup mode short-circuit protection (see the Device Comparison Table)
- Programmable line UVLO
- OVP protection
- Thermal shutdown
- Accurate ±1% accuracy feedback reference
- Programmable extra slope compensation
- Adjustable soft start
- PGOOD indicator
- Create a custom design using the LM5155x with the WEBENCH power designer
All trademarks are the property of their respective owners.
Description
The LM5155x (LM5155 and LM51551) 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.
The LM5155x can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LM5155x 2.2-MHz Wide Input Nonsynchronous Boost, SEPIC, Flyback Controller datasheet (Rev. D) | Jan. 07, 2021 |
Application note | LM5155x FIT Rate and Failure Mode Distribution | Feb. 04, 2020 | |
Application note | How to design an isolated flyback using LM5155 | Feb. 05, 2019 | |
Application note | How to Design a Boost Converter Using LM5155 | Dec. 17, 2018 | |
User guide | LM5155EVM-BST User's Guide | Dec. 11, 2018 | |
Technical articles | How to add overvoltage protection to a synchronous boost controller | Sep. 17, 2018 | |
User guide | LM5155EVM-FLY User's Guide | Aug. 02, 2018 | |
Application note | Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout | Nov. 13, 2017 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Smart Piezo driver algorithm for Piezo applications
- Runs with I2C initialization
- GUI control via USB port
Description
The LM5155EVM-BST evaluation module showcases the features and performance of the LM5155, wide input non-synchronous boost controller. The standard configuration is designed to provide a regulate output of 24V at 2A from an input of 6V to 18V, switching at 440 kHz.
This EVM is designed for ease of (...)
Features
- Input voltage range: 6V to 18V
- Output voltage 24V at 2A
- 440kHz switching frequency
- External clock synchronization
Description
Features
- Input voltage range: 18V to 36V
- Isolated output voltage 5V at 4A
- Switching frequency 250kHz
- Two layer PCB with single sided component population
- Hiccup mode short circuit protection
Description
Features
- Input voltage range: 3V to 42V
- Output voltage 12V, up to to 2A
- Switching frequency 2.2 MHz
- Two layer PCB with single sided component population
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
-
download PMP40679 BOM.pdf (139KB) -
download PMP40679 Assembly Drawing.pdf (189KB) -
download PMP40679 PCB.pdf (1032KB) -
download PMP40679 CAD Files.zip (1180KB) -
download PMP40679 Gerber.zip (1602KB)
Design files
-
download PMP40488 Assembly Drawing.pdf (71KB) -
download PMP40488 PCB.pdf (238KB) -
download PMP40488 Gerber.zip (451KB) -
download PMP40488 BOM (Rev. B).pdf (134KB) -
download PMP40488 CAD Files (Rev. B).zip (478KB)
Design files
-
download PMP22151 BOM.pdf (292KB) -
download PMP22151 Assembly Drawing.pdf (131KB) -
download PMP22151 PCB.pdf (587KB) -
download PMP22151 CAD Files.zip (880KB) -
download PMP22151 Gerber.zip (449KB)
Design files
-
download PMP40555 BOM.pdf (98KB) -
download PMP40555 Assembly Drawing.pdf (107KB) -
download PMP40555 PCB.pdf (552KB) -
download PMP40555 CAD Files.zip (660KB) -
download PMP40555 Gerber.zip (1544KB)
Design files
-
download PMP40569 BOM.pdf (99KB) -
download PMP40569 Assembly Drawing.pdf (124KB) -
download PMP40569 PCB.pdf (598KB) -
download PMP40569 CAD Files.zip (834KB) -
download PMP40569 Gerber.zip (1573KB)
Design files
-
download TIDA-050023 BOM.pdf (37KB) -
download TIDA-050023 CAD Files.zip (2327KB) -
download TIDA-050023 Assembly Drawing.pdf (286KB) -
download TIDA-050023 Gerber.zip (713KB) -
download TIDA-050023 PCB.pdf (1558KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
WSON (DSS) | 12 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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