EEWORLDEEWORLDEEWORLD

Part Number

Search

LT8309IS5#TRPBF

Description
IC reg flyback iso adj tsot23-5
Categorysemiconductor    Power management   
File Size221KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance  
Download Datasheet Compare View All

LT8309IS5#TRPBF Overview

IC reg flyback iso adj tsot23-5

LT8309
Secondary-Side
Synchronous Rectifier Driver
FeaTures
n
n
n
n
n
DescripTion
The
LT
®
8309
is a secondary-side synchronous rectifier
driver that replaces the output rectifier diode in a flyback
topology. By replacing the diode with a N-channel MOSFET,
applications are no longer restricted by the heat constraints
of the output diode. The IC replicates the behavior of a
diode by sensing the drain-to-source voltage to determine
when the current becomes negative. The LT8309's low
minimum on- and off-times help improve noise immunity.
The fast propagation delay of 26ns allows applications to
operate in discontinuous conduction mode (DCM) and
critical conduction mode (CrCM). The gate driver features
a 0.8Ω pull-down device for fast turn-offs. The 40V V
CC
rating allows the part to be driven from the output volt-
age or the rectified drain voltage of the MOSFET. A low
quiescent current of 400µA maximizes efficiency at low
output currents.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
n
n
n
Works with DCM and BCM/CrCM Conduction Mode
Flyback Topologies
V
CC
: 4.5V to 40V
Supports Up to 150V MOSFETs
26ns Turn-Off Propagation Delay
Accurate Minimum On and Off Timers for Reliable
Operation
Adjustable and Accurate Trip Point: +5mV to –30mV
1Ω Gate Driver Pull-Down
SOT-23 5-Lead Package
applicaTions
n
n
High Output Current Flybacks
High Efficiency Flybacks
Typical applicaTion
40W, 5V Isolated Telecom Supply
V
IN
36V TO
72V
5.33:1
10µF
15.4k
412k
EN/UVLO
V
IN
R
FB
R
REF
60
100pF
147k
6.04k
TC
30.9k
0.1µF
SS
V
C
12.1k
15nF
GATE
SENSE
GND INTV
CC
4.7µF
V
OUT +
5V, 8A
100
95
90
EFFICIENCY (%)
85
80
75
70
V
OUT–
8309 TA01a
Efficiency vs Load Current
10
1µF
2.2k
V
CC
LT8309
400µF
V
IN
= 48V WITH LT8309
LT3748
6.2V
DRAIN
INTV
CC
GATE
GND
4.7µF
V
IN
= 48V WITH PDS760 DIODE
12m
65
0
1
2
3
4
5
6
LOAD CURRENT (A)
7
8
8309 TA01b
For more information
www.linear.com/LT8309
1
8309f

LT8309IS5#TRPBF Related Products

LT8309IS5#TRPBF LT8309ES5#TRPBF
Description IC reg flyback iso adj tsot23-5 IC reg flyback iso adj 5sot-23
SensorTile IoT Development Kit (5) - DIY Intercommunication
[i=s]This post was last edited by lb8820265 on 2016-10-29 10:41[/i] [align=left][font=微软雅黑][size=3]First, here is the effect picture:[/size][/font][/align][align=center][/align][align=left][font=微软雅黑]...
lb8820265 MEMS sensors
Has anyone used EVC to develop symbol mc1000?
The requirement is very simple, that is, every time you scan a barcode, write a line in a UP.TXT, and then scan the barcode again and write it in the second line, until you no longer scan the barcode....
wangwenjia Embedded System
Question: How to call the calculator in the driver?
I want to pop up a calculator on the keyboard with one click. I used WinExec("calc.exe",SW_SHOWNORMAL); but the compilation fails and the error 'WinExec' undefined; assuming extern returning int 'SW_S...
ATT001 Embedded System
Reasons why the POE module does not supply power
People often encounter this problem. When using a non-isolated module with a POE switch, several POE switch ports will not be powered. What is the problem? This is because of the POE chip on the POE m...
达普POE交换机 Industrial Control Electronics
The peak of the switching power supply [attached picture], is this considered high?
I used a switching power supply in my project, and I felt that the burrs were relatively large during use. Some power modules would cause the digital circuit to malfunction (the digital module would w...
子乐 Power technology
Why are aluminum electrolytic capacitors used in LED lighting circuits? What are the precautions?
LED lighting power supply belongs to switching power supply. Using aluminum electrolytic capacitor for filtering is an indispensable part of switching power supply design. The normal working life of s...
qwqwqw2088 Power technology

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2413  2317  943  30  1414  49  47  19  1  29 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号