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LM5156H

ACTIVE

2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum

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Data sheet

LM5156H

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 1.5 Vin (max) (V) 60 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Boost, Flyback, SEPIC Rating Catalog Vout (min) (V) 1.5 Vout (max) (V) 300 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Nonsynchronous rectification, Power good, Spread Spectrum, UVLO adjustable Iq (typ) (µA) 490 Duty cycle (max) (%) 93 TI functional safety category Functional Safety-Capable
Vin (min) (V) 1.5 Vin (max) (V) 60 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Boost, Flyback, SEPIC Rating Catalog Vout (min) (V) 1.5 Vout (max) (V) 300 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Nonsynchronous rectification, Power good, Spread Spectrum, UVLO adjustable Iq (typ) (µA) 490 Duty cycle (max) (%) 93 TI functional safety category Functional Safety-Capable
HTSSOP (PWP) 14 32 mm² 5 x 6.4
  • 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
  • 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

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.

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.
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LM5156 ACTIVE 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum Functionally equivalent device in a WSON package

Technical documentation

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Type Title Date
* Data sheet LM5156xH 2.2-MHz Wide VIN 65-V Non-synchronous Boost/SEPIC/Flyback Controller with 150°C Maximum Junction Temperature datasheet PDF | HTML 23 Sep 2020
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
Application note EMI 감소 기법, 듀얼 랜덤 확산 스펙트럼 (Rev. A) PDF | HTML 21 Nov 2022
Application note LM5156을 사용하여 부스트 컨버터를 설계하는 방법 (Rev. A) PDF | HTML 21 Nov 2022
Application note How to Design a Boost Converter Using the LM5156 (Rev. A) PDF | HTML 14 Nov 2022
Application note EMI Reduction Technique, Dual Random Spread Spectrum (Rev. A) 19 Oct 2022
Functional safety information LM34966-Q1, LM5156x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution (Rev. C) PDF | HTML 28 Apr 2021
EVM User's guide LM5156HEVM-FLY Evaluation Module PDF | HTML 15 Sep 2020
Certificate LM5156HEVM-FLY EU Declaration of Conformity (DoC) 31 Aug 2020

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