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LM2724A PDF预览

LM2724A

更新时间: 2024-10-28 11:06:39
品牌 Logo 应用领域
德州仪器 - TI 驱动驱动器MOSFET驱动器
页数 文件大小 规格书
11页 696K
描述
高速 3A 同步 MOSFET 驱动器

LM2724A 数据手册

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NRND  
LM2724A  
www.ti.com  
SNVS242C JUNE 2003REVISED MARCH 2013  
LM2724A High Speed 3A Synchronous MOSFET Driver  
Check for Samples: LM2724A  
1
FEATURES  
DESCRIPTION  
The LM2724A is a dual N-channel MOSFET driver  
2
Shoot-Through Protection  
which can drive both the top and bottom MOSFETs in  
a push-pull structure simultaneously. The LM2724A  
takes a logic input and splits it into two complimentary  
signals with a typical 20ns dead time in between. The  
built-in cross-conduction protection circuitry prevents  
the top and bottom MOSFETs from turning on  
simultaneously. With a bias voltage of 5V, the peak  
sourcing and sinking current for each driver of the  
LM2724A is about 3A. Input UVLO (Under-Voltage-  
Lock-Out) ensures that all the driver outputs stay low  
until the supply rail exceeds the power-on threshold  
during system power on, or after the supply rail drops  
below power-on threshold by a specified hysteresis  
during system power down. The cross-conduction  
protection circuitry detects both driver outputs and will  
not turn on a driver until the other driver output is low.  
The top gate voltage needed by the top MOSFET is  
obtained through an external boot-strap structure.  
When not switching, the LM2724A only draws up to  
195µA from the 5V rail. The synchronization  
operation of the bottom MOSFET can be disabled by  
pulling the SYNC pin to ground.  
Input Under-Voltage-Lock-Out  
3A Peak Driving Current  
195µA Quiescent Current  
28V Input Voltage in Buck Configuration  
SOIC-8 and WSON Packages  
APPLICATIONS  
High Current DC/DC Power Supplies  
High Input Voltage Switching Regulators  
Fast Transient Microprocessors  
Notebook Computers  
TYPICAL APPLICATION  
VIN (up to 28V)  
D1  
C2  
+
1.5  
+5V  
C3  
Q1  
.33mF  
U1  
C1  
6
5
4
8
3
2
1
7
1mF  
BOOT  
VCC  
L1  
VOUT  
(to controller)  
(to controller)  
HG  
SW  
LG  
SYNC  
IN  
Q2  
+
GND  
C4  
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 © 2003–2013, Texas Instruments Incorporated  

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