LM5121

更新时间： 2024-09-29 12:19:27

品牌	Logo	应用领域
德州仪器 - TI		开关控制器
页数	文件大小	规格书
43页	2242K
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Wide Input Synchronous Boost Controller with Disconnection Switch Control

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LM5121 数据手册

LM5121/LM5121-Q1

www.ti.com

SNVS963A –SEPTEMBER 2013–REVISED SEPTEMBER 2013

Wide Input Synchronous Boost Controller with Disconnection Switch Control

Check for Samples: LM5121/LM5121-Q1

FEATURES

•

Thermally Enhanced 20-Pin HTSSOP Package

•

Available in AEC-Q100 (T_J= –40ºC to 125ºC)

Maximum Input Voltage: 65 V

APPLICATIONS

•

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

High Current Boost Power Supply

Battery Powered System

Bypass (V_OUT= V_IN) Operation

1.2 V Reference with ±1.0% Accuracy

Free-Run/Synchronizable up to 1 MHz

Peak Current Mode Control

DESCRIPTION

The LM5121 is a synchronous boost controller

intended for high-efficiency, high power 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.

Robust Integrated 3 A Gate Drivers

Adaptive Dead-Time Control

Optional Diode Emulation Mode

Programmable Cycle-by-Cycle Current Limit

Programmable Line UVLO

The switching frequency is programmable up to 1

MHz. Higher efficiency is achieved using two robust

N-channel MOSFET gate drivers with adaptive dead-

time control. A user-selectable diode emulation mode

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

Programmable Skip Cycle Mode Reduces

Standby Power

The LM5121 provides disconnection switch control

which completely disconnects the output from the

input during an output short or a shutdown condition.

During start-up sequence, inrush current is limited by

the disconnection switch control.

•

Supports External VCC Bias Supply Option

Load Disconnection in Shutdown Mode (True

Shutdown)

An internal charge pump allows 100% duty cycle

operation of the high-side synchronous switch

(Bypass operation). Additional features include

thermal shutdown, frequency synchronization, hiccup

mode current limit and adjustable line undervoltage

lockout.

•

Inrush Current Limiting

Hiccup Mode Short Circuit / Overload

Protection

•

Circuit Breaker Function

Capable of Input Transient Suppression

Capable of Reverse Battery Protection

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.

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.

12 3 4 5 6 7...43

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LM5121 替代型号

型号	品牌	替代类型	描述	数据表
LM5122	TI	功能相似	Wide Input Synchronous Boost Controller with Multiple Phase Capability

与LM5121相关器件

型号	品牌	获取价格	描述	数据表
LM5121_15	TI	获取价格	LM5121 Wide Input Synchronous Boost Controller with Disconnection Switch Control
LM5121MH/NOPB	TI	获取价格	Wide Input Synchronous Boost Controller with Disconnection Switch Control
LM5121MHE/NOPB	TI	获取价格	Wide Input Synchronous Boost Controller with Disconnection Switch Control
LM5121MHENOPB	TI	获取价格	Wide Input Synchronous Boost Controller with Disconnection Switch Control
LM5121MHNOPB	TI	获取价格	Wide Input Synchronous Boost Controller with Disconnection Switch Control
LM5121MHX/NOPB	TI	获取价格	Wide Input Synchronous Boost Controller with Disconnection Switch Control
LM5121MHXNOPB	TI	获取价格	Wide Input Synchronous Boost Controller with Disconnection Switch Control
LM5121-Q1	TI	获取价格	Wide Input Synchronous Boost Controller with Disconnection Switch Control
LM5121-Q1_15	TI	获取价格	LM5121 Wide Input Synchronous Boost Controller with Disconnection Switch Control
LM5121QMH/NOPB	TI	获取价格	Wide Input Synchronous Boost Controller with Disconnection Switch Control

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