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LM5116WG/NOPB PDF预览

LM5116WG/NOPB

更新时间： 2024-11-17 11:15:19
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
34页 1013K
描述
100V 宽输入电压同步降压控制器 | NAR | 20 | -40 to 125

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LM5116WG/NOPB 数据手册

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LM5116WG  
www.ti.com  
SNVS599D –OCTOBER 2008–REVISED FEBRUARY 2013  
LM5116WG Wide Range Synchronous Buck Controller  
Check for Samples: LM5116WG  
1
FEATURES  
DESCRIPTION  
The LM5116WG is a synchronous buck controller  
intended for step-down regulator applications from a  
high voltage or widely varying input supply. The  
control method is based upon current mode control  
utilizing an emulated current ramp. Current mode  
control provides inherent line feed-forward, cycle by  
cycle current limiting and ease of loop compensation.  
The use of an emulated control ramp reduces noise  
sensitivity of the pulse-width modulation circuit,  
allowing reliable control of very small duty cycles  
necessary in high input voltage applications. The  
operating frequency is programmable from 50 kHz to  
1 MHz. The LM5116WG drives external high-side and  
low-side NMOS power switches with adaptive dead-  
time control. A user-selectable diode emulation mode  
enables discontinuous mode operation for improved  
efficiency at light load conditions. A low quiescent  
current shutdown disables the controller and  
consumes less than 10 µA of total input current.  
2
•
Hermetic Package for Harsh Operating  
Environments  
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Emulated Peak Current Mode  
Wide Operating Range up to 100V  
Low IQ Shutdown (< 10 µA)  
Drives Standard or Logic Level MOSFETs  
Robust 3.5A Peak Gate Drive  
Free-Run or Synchronous Operation to 1 MHz  
Optional Diode Emulation Mode  
Programmable Output from 1.215V to 80V  
Precision 1.5% Voltage Reference  
Programmable Current Limit  
Programmable Soft-Start  
Programmable Line Under-Voltage Lockout  
Automatic Switch to External Bias Supply  
CPGA-20 with No Thermal Shutdown  
Additional features include  
a high voltage bias  
regulator, automatic switch-over to external bias for  
improved efficiency, frequency synchronization, cycle  
by cycle current limit and adjustable line under-  
voltage lockout. The device is available in a CPGA-20  
high temperature ceramic package with the thermal  
shutdown feature disabled.  
Typical Application  
VIN  
VCC  
VIN  
LM5116WG  
C
VCC  
R
R
C
UV2  
IN  
HB  
UVLO  
V
IN  
UV1  
C
HB  
HO  
SW  
L
EN  
VOUT  
C
SYNC  
RT/SYNC  
C
OUT  
LO  
CS  
R
T
R
S
COMP  
FB  
CSG  
C
COMP  
DEMB  
C
HF  
R
COMP  
VOUT  
VCCX  
R
R
FB2  
SS  
RAMP  
C
AGND PGND  
RAMP  
C
SS  
FB1  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2008–2013, Texas Instruments Incorporated  
1234567...34

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