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LM5122QMH/NOPB PDF预览

LM5122QMH/NOPB

更新时间: 2024-11-23 12:02:39
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
43页 1765K
描述
Wide Input Synchronous Boost Controller with Multiple Phase Capability

LM5122QMH/NOPB 数据手册

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LM5122/LM5122-Q1  
www.ti.com  
SNVS954C APRIL 2013REVISED MAY 2013  
Wide Input Synchronous Boost Controller with Multiple Phase Capability  
Check for Samples: LM5122/LM5122-Q1  
1
FEATURES  
APPLICATIONS  
Available in AEC-Q100 (LM5122-Q1)  
Maximum Input Voltage : 65 V  
12 V, 24 V, and 48 V Power Systems  
Automotive Start-Stop  
Min Input Voltage : 3.0 V (4.5 V for startup)  
Output Voltage up to 100 V  
Audio Power Supply  
High Current Boost Power Supply  
Bypass (VOUT = VIN) Operation  
DESCRIPTION  
The LM5122 is a multiphase capable synchronous  
boost  
synchronous boost regulator applications. The control  
method is based upon peak current mode control.  
Current mode control provides inherent line feed-  
forward, cycle-by-cycle current limiting and ease of  
loop compensation.  
1.2 V Reference with ±1.0% Accuracy  
Free-Run/Synchronizable Switching to 1 MHz  
Peak Current Mode Control  
controller  
intended  
for  
high-efficiency  
Robust 3 A Integrated Gate Drivers  
Adaptive Dead-Time Control  
Optional Diode Emulation Mode  
Programmable Cycle-by-Cycle Current Limit  
Hiccup Mode Overload Protection  
Programmable Line UVLO  
The switching frequency is programmable up to 1  
MHz. Higher efficiency is achieved by two robust N-  
channel MOSFET gate drivers with adaptive dead-  
time control. A user-selectable diode emulation mode  
also enables discontinuous mode operation for  
improved efficiency at light load conditions.  
Programmable Soft-Start  
Thermal Shutdown Protection  
Low Shutdown Quiescent Current: 9 μA  
Programmable Slope Compensation  
An internal charge pump allows 100% duty cycle for  
high-side synchronous switch (Bypass operation). A  
180º phase shifted clock output enables easy multi-  
phase interleaved configuration. Additional features  
include thermal shutdown, frequency synchronization,  
hiccup mode current limit and adjustable line  
undervoltage lockout.  
Programmable Skip Cycle Mode Reduces  
Standby Power  
Allows External VCC Supply  
Inductor DCR Current Sensing Capability  
Multiphase Capability  
Thermally Enhanced 20-Pin HTSSOP  
SIMPLIFIED APPLICATION DIAGRAM  
V
IN  
V
OUT  
+
VCC BST  
CSN  
SW  
LO  
HO  
COMP  
FB  
CSP  
VIN  
UVLO  
RES  
SLOPE  
SYNCIN/RT  
SYNCOUT  
SS  
MODE  
PGND  
AGND  
OPT  
LM5122  
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.  
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 © 2013, Texas Instruments Incorporated  

LM5122QMH/NOPB 替代型号

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LM5122MH/NOPB TI

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Wide Input Synchronous Boost Controller with Multiple Phase Capability
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