FUNDAMENTALS OF FORWARD CONVERTER OPERATION IN CCM ..................................................................... 13
LT8311 SYNCHRONOUS CONTROL SCHEMES..................................................................................................... 17
PREACTIVE MODE SYNCHRONOUS CONTROL .................................................................................................... 17
SYNC MODE SYNCHRONOUS CONTROL ............................................................................................................. 19
OPTO-COUPLER CONTROL .................................................................................................................................. 21
Applications Information .......................................................................................................25
Related Parts .....................................................................................................................48
8311f
2
For more information
www.linear.com/LT8311
LT8311
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
TOP VIEW
CSW
FSW
FG
INTV
CC
V
IN
PMODE
OPTO
1
3
5
6
7
8
9
20 CSP
18 CSN
16 CG
15 SYNC
14 SS
13
PGOOD
12 TIMER
11 FB
CSW, FSW, CSP ....................................... –0.3V to 150V
SYNC ........................................................... –12V to 12V
V
IN
,
PGOOD
................................................ –0.3V to 30V
INTV
CC
,
PMODE
......................................... –0.3V to 18V
FB, SS, COMP ........................................... –0.3V to 2.5V
TIMER ....................................................... –0.3V to 1.5V
CSN........................................................... –0.3V to 0.4V
OPTO, TIMER Short-Circuit
Current Duration .................................... Infinite (Note 5)
Operating Junction Temperature Range
LT8311E (Notes 2, 3) ......................... –40°C to 125°C
LT8311I (Notes 2, 3) .......................... –40°C to 125°C
LT8311H (Notes 2, 3) ......................... –40°C to 150°C
LT8311MP (Notes 2, 3) ...................... –55°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10sec).................... 300°C
21
GND
COMP 10
FE PACKAGE
20-LEAD PLASTIC TSSOP
θ
JA
= 38°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT8311EFE#PBF
LT8311IFE#PBF
LT8311HFE#PBF
LT8311MPFE#PBF
TAPE AND REEL
LT8311EFE#TRPBF
LT8311IFE#TRPBF
LT8311HFE#TRPBF
LT8311MPFE#TRPBF
PART MARKING*
LT8311FE
LT8311FE
LT8311FE
LT8311FE
PACKAGE DESCRIPTION
20-Lead Plastic TSSOP
20-Lead Plastic TSSOP
20-Lead Plastic TSSOP
20-Lead Plastic TSSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–55°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
8311f
For more information
www.linear.com/LT8311
3
LT8311
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 12V, V
INTVCC
= 8V,
PMODE
= 5V, C
CG
= C
FG
= 100pF, unless
otherwise noted. (Note 2)
PARAMETER
Supply
V
IN
Operating Range
V
IN
UVLO
Quiescent Current
Error Amplifier
Feedback Reference Voltage
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Feedback Pin Bias Current
Error Amplifier Transconductance
Error Amplifier Voltage Gain
Error Amplifier Output Swing High
Error Amplifier Output Swing Low
Power Good
Power NOT Good (Outside This Window) % Relative to FB Ref Voltage
Power Good (Inside This Window)
Power Good Indicator Wait Time
Power Good Leakage
Power Good Output Low Voltage
Soft-Start (SS)
SS Wake-Up Slew Current
SS Wake-Up Offset Voltage
SS Charge Current
SS Pull-Down Amplifier Offset Voltage
Current Exists Upon Part Wake Up, Shuts Off After SS Wake Up
Offset Voltage Is Satisfied (Note 6)
V
FB
– V
SS
, Upon Part Wake Up SS Is Slewed Up to an Offset
Voltage Below FB by SS Wake-Up Slew Current
SS = 0V, FB = 0.6V (Note 9)
V
SS
– V
FB
, Pull-Down Amplifier Prevents SS from Rising Beyond
This Offset Voltage Above FB When the FB Pin Voltage Is Below
50% of the FB Reference Voltage
SS = 1.5V, FB = 0.6V (Note 7)
1.8
1.3V ≤ COMP (Note 5)
(Note 5)
(Note 5)
l
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
3.7
50
TYP
MAX
30
UNITS
V
V
mV
mA
V
%
%
nA
µmhos
dB
V
IN
Rising
Hysteresis
Not Switching
V
IN
= 12V
3.7V ≤ V
IN
≤ 30V, % of FB Ref Voltage
1.3V ≤ COMP ≤ 1.8V, % of FB Ref Voltage
Current Out of FB pin
1.3V ≤ COMP ≤ 1.8V
1.3V ≤ COMP ≤ 1.8V
FB = 1V
FB = 1.5V
l
3.6
100
4.5
3.7
150
5.5
1.245
0.1
0.1
200
l
1.209
1.227
0.015
0.05
120
370
65
1.9
0.75
±4
2.3
1
±10
±7
175
2.8
1.25
±16
V
V
%
%
µs
% Relative to FB Ref Voltage
Minimum Time That FB Must Stay within Power Good Window
Before
PGOOD
Pin Goes Low
PGOOD
= 30V
Current into
PGOOD
Pin = 1mA
l
±1
0.2
1
16
9
10
100
11
0.3
µA
V
mA
mV
µA
mV
SS Pull-Down Amplifier Maximum
Sink Current
SS High Clamp Voltage
Opto Driver
COMP Buffer Input Offset Voltage
Opto-Driver Reference Voltage
Opto-Driver DC Gain
13
2
0.9
1
–7
mA
V
V
V
V/ V
8311f
4
For more information
www.linear.com/LT8311
LT8311
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
:congratulate:We often test some motors in our factory. Every time we use control board + inverter + wireThere are so many things and it is troublesome, so I want to DIY a simple inverter with 51 sing...
Vocational college students play with microcontrollers, undergraduate students play with analog electronics, and graduate students play with ARMFPGA. PhD students play with systems. I don't know what ...
Author: Wang Huidong (a member of Mr. Express Team of Yibo Technology)Text:The day I met you, it was drizzling in the sky, andI got a vegetable dish in the school cafeteria to reward myself.My family ...
On September 11, Apple released the Apple Watch S5 series of watches. The launch of Apple Watch has redefined the smart watch industry, especially the addition of health monitoring functions, which al...
1. Several nouns
ABI:
The specifications that an executable file must follow in order to run in a specific execution environment;
Separately generated relocatabl...[Details]
1. Equipment Overview
Shell-and-tube heat exchangers are a common heat exchange device used in chemical evaporation and heating equipment. Currently, the tubesheets of shell-and-tube heat exch...[Details]
Some time ago, I attended the 4th Energy Chemistry Forum of the Chinese Chemical Society and learned about high-energy-density and high-safety batteries. I would like to summarize and share this wi...[Details]
Whether it is an electric car or an ordinary fuel car, for the vast majority of car buyers, the final cost of use is what they care about most. For fuel cars, how to save fuel is what drivers care ...[Details]
Multi-touch mobile phone
Multi-touch is a system that can respond to multiple touches on the screen at the same time. Multi-touch phones are divided into capacitive and resistive types. Capaci...[Details]
Capable of providing precise and efficient thermal management for artificial intelligence computing power, intelligent sensing and autonomous driving systems
Shenzhen, ...[Details]
1. Introduction
Electronic scales are gradually replacing traditional measuring tools like springs and balances in everyday life, such as electronic price computing scales and electronic weigh...[Details]
Definition of interactive projection system:
Interactive projection systems, also known as multimedia interactive projection, are available in floor, wall, and tabletop interactive projection....[Details]
According to foreign media reports, researchers at the University of Surrey have developed an artificial intelligence system that can accurately locate the location of equipment in densely populate...[Details]
Since its invention in the mid-1940s, the microwave oven has evolved from a humble beginning to commercial use, entering homes in the 1960s and rapidly gaining popularity. Its basic functionality a...[Details]
According to Nikkei, Japan has performed poorly in responding to China's power semiconductor challenges.
There are five major companies in Japan's power chip market: Mitsubishi Electric,...[Details]
Recently, Joyson Electronics has made positive progress in the core technology research and development of the robot's "brain and brain" and key components, and launched the industry's first integr...[Details]
To improve the lateral active safety of intelligent connected vehicles, the identification and definition of unexpected functional safety scenarios for the EPS (Electronic Steering System) ...[Details]
HTTP is the abbreviation of Hypertext Transfer Protocol. It is an application protocol based on TCP/IP communication protocol used to transmit HTML and image files. It is an application-level objec...[Details]
With growing environmental awareness, the continuous improvement of three-electric technology and the increasing deployment of infrastructure such as charging stations, the electrification of new e...[Details]
FPGA/CPLD
京公网安备 11010802033920号
EEWORLD
