2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with spread spectrum and hiccup
Product details
Parameters
Package | Pins | Size
Features
- Functional Safety-Capable
- Documentation available to aid functional safety system design
- Suited for wide input operating range battery applications
- 3.5-V to 60-V Operating range (65-V abs max)
- 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 65 V
- Minimized battery drain
- Low shutdown current ( IQ ≤ 2.6 µA )
- Low operating current ( IQ ≤ 490 µA )
- Small solution size and low cost
- Maximum switching frequency of 2.2 MHz
- Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
- EMI mitigation
- Selectable dual random spread spectrum
- Higher efficiency with low-power dissipation
- 100-mV ±7% accurate 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 overload 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
- 14-Pin HTSSOP package (5.0 mm × 4.4 mm)
- Create a custom design using the LM5156xH with the WEBENCH power designer
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Description
The LM5156xH (LM5156H and LM51561H) 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.
The device 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
= Top documentation for this product selected by TI
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LM5156xH 2.2-MHz Wide VIN 65-V Non-synchronous Boost/SEPIC/Flyback Controller with 150°C Maximum Junction Temperature datasheet | Sep. 23, 2020 |
Functional safety information | LM34966-Q1, LM5156x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution (Rev. B) | Jan. 12, 2021 | |
User guide | LM5156HEVM-FLY Evaluation Module | Sep. 15, 2020 | |
Application note | EMI Reduction Technique, Dual Random Spread Spectrum | Jun. 19, 2020 | |
Technical articles | How to add overvoltage protection to a synchronous boost controller | Sep. 17, 2018 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
LM5156HEVM-FLY
Description
The LM5156HEVM-FLY evaluation module showcases the features and performance of the LM51561 (TSSOP package) as wide input non-synchronous flyback controller. The standard configuration is designed to provide a regulated output of 5V at 4A from an input of 18V to 36V, switching at 250 kHz. This (...)
Features
- Input voltage range: 18V to 36V
- Isolate output voltage 5V at 4A
- Switching frequency 250kHz
- Hiccup mode short circuit protection
Design tools & simulation
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
HTSSOP (PWP) | 14 | View options |
Ordering & quality
Information included:
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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