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LM5156XH

更新时间： 2024-09-27 02:49:51
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德州仪器 - TI /
页数 文件大小 规格书
49页 2261K
描述
LM5156xH 2.2-MHz Wide VIN 65-V Non-synchronous Boost/SEPIC/Flyback Controller with 150°C Maximum Junction Temperature

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LM5156XH 数据手册

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LM5156H, LM51561H  
SNVSBV2 – SEPTEMBER 2020  
LM5156xH 2.2-MHz Wide VIN 65-V Non-synchronous Boost/SEPIC/Flyback Controller  
with 150°C Maximum Junction Temperature  
1 Features  
2 Applications  
•
•
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  
•
•
•
•
•
•
Multiple-output flyback without optocoupler  
LED bias supply  
Wide input boost, SEPIC, flyback power module  
Portable speaker application  
Flyback POE power supply application  
Battery-powered boost, SEPIC, flyback  
3 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.  
– Input transient protection up to 65 V  
– Minimized battery drain  
•
•
Low shutdown current ( IQ ≤ 2.6 µA )  
Low operating current ( IQ ≤ 490 µA )  
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.  
•
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  
Device Information  
PART NUMBER  
PACKAGE(1)  
BODY SIZE (NOM)  
•
•
LM5156xH  
HTSSOP (14)  
5.0 mm × 4.4 mm  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
VSUPPLY  
VLOAD  
•
•
BIAS  
GATE  
CS  
VCC  
UVLO/SYNC  
DITHOFF  
AGND  
PGND  
FB  
Integrated protection features  
PGOOD  
– Constant peak current limiting over input  
voltage  
RT  
SS COMP  
– Optional hiccup mode overload protection (see  
the Device Comparison Table)  
– Programmable line UVLO  
Typical Boost Application  
– 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  
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
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