数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

SF5539 数据表(PDF) 1 Page - SIFIRST TECHNOLOGIES NANHAI LIMITED

部件名 SF5539
功能描述  管-BalanceTM PWM Power Switch Fixed 50KHz Fsw
Download  2 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  SIFIRST [SIFIRST TECHNOLOGIES NANHAI LIMITED]
网页  http://www.sifirsttech.com/en/
标志 SIFIRST - SIFIRST TECHNOLOGIES NANHAI LIMITED

SF5539 数据表(HTML) 1 Page - SIFIRST TECHNOLOGIES NANHAI LIMITED

  SF5539 Datasheet HTML 1Page - SIFIRST TECHNOLOGIES NANHAI LIMITED SF5539 Datasheet HTML 2Page - SIFIRST TECHNOLOGIES NANHAI LIMITED  
Zoom Inzoom in Zoom Outzoom out
 1 / 2 page
background image
©SiFirst Technology
- 1 -
Confidential
SiFirst_DS_5539_V1.0
SF5539
FEATURES
◆ Less than 75mW Standby Power
◆ Built-in 600V Power MOSFET
◆ Programmable OLP Debounce Time
◆ Proprietary η
-Balance
TM
Control to Boost
Light Load Efficiency
◆ Proprietary “Zero OCP/OPP Recovery Gap”
Control
◆ Fixed 50KHz Switching Frequency
◆ Built-in Soft Start Function
◆ Very Low Startup Current
◆ Frequency Reduction and Burst Mode Control
for Energy Saving
◆ Current Mode Control
◆ Built-in Frequency Shuffling
◆ Built-in Synchronous Slope Compensation
◆ Cycle-by-Cycle Current Limiting
◆ Built-in Leading Edge Blanking (LEB)
◆ Constant Power Limiting
◆ Pins Floating Protection
◆ Audio Noise Free Operation
◆ VDD OVP & Clamp
VDD Under Voltage Lockout (UVLO)
APPLICATIONS
Offline AC/DC Flyback Converter for
◆ AC/DC Adaptors
◆ Open-frame SMPS
GENERAL DESCRIPTION
SF5539 is a high performance, high efficiency, highly
integrated current mode PWM power switch for
offline flyback converter applications.
In SF5539, PW M switching frequency with shuffling is
fixed to 50KHz and is trimmed to tight range. When
the
output
power
demands
decrease,
the
IC
decreases
switching
frequency
based
on
the
proprietary η
-Balance
TM
control to boost power
conversion efficiency at the light load. When output
power falls below a given value, the IC enters into
burst mode and provides excellent efficiency without
audio noise.
The IC can achieve “Zero OCP/OPP Recovery Gap”
using
SiFirst’s
proprietary
control
algorithm.
Meanwhile, the OCP/OPP variation versus universal
line input is compensated.
The IC has built-in synchronized slope compensation
to prevent sub-harmonic oscillation at high PWM duty
output. The IC also has built-in soft start function to
soften the stress on the MOSFET during power on
period.
SF5539 integrates functions and protections of Under
Voltage
Lockout
(UVLO),
VCC
Over
Voltage
Protection (OVP), Cycle-by-cycle Current Limiting
(OCP),
Pins
Floating
Protection,
Over
Load
Protection (OLP), VCC Clamping, Leading Edge
Blanking (LEB), etc.
SF5539 is available in DIP8 packages.
TYPICAL APPLICATION
EMI
Filter
AC IN
SF5539
DC Out
TL431
1
VDD
FB
CS
GND
CT
2
3
4
8
7
6
5
GND
Drain
Drain
η-Balance
TM
PWM Power Switch
Fixed 50KHz Fsw


类似零件编号 - SF5539

制造商部件名数据表功能描述
logo
SIFIRST TECHNOLOGIES NA...
SF5539H SIFIRST-SF5539H Datasheet
87Kb / 2P
   Less than 75mW Standby Power
SF5539HDP SIFIRST-SF5539HDP Datasheet
87Kb / 2P
   Less than 75mW Standby Power
More results

类似说明 - SF5539

制造商部件名数据表功能描述
logo
SIFIRST TECHNOLOGIES NA...
SF1539W SIFIRST-SF1539W Datasheet
86Kb / 2P
   管-BalanceTM PWM Power Switch Fixed 50KHz Fsw
SF1539 SIFIRST-SF1539 Datasheet
51Kb / 2P
   管-BalanceTM PWM Power Switch Fixed 50KHz Fsw
SF1533 SIFIRST-SF1533 Datasheet
52Kb / 2P
   管-BalanceTM PWM Power Switch Fixed 50KHz Fsw
SF1548 SIFIRST-SF1548 Datasheet
64Kb / 2P
   管-BalanceTM PWM Power Switch Fixed 65KHz Fsw
SF1546 SIFIRST-SF1546 Datasheet
87Kb / 2P
   管-BalanceTM PWM Power Switch Fixed 65KHz Fsw
SF1549 SIFIRST-SF1549 Datasheet
65Kb / 2P
   管-BalanceTM PWM Power Switch Fixed 65KHz Fsw
SF1539HT SIFIRST-SF1539HT Datasheet
53Kb / 2P
   管-BalanceTM PWM Power Switch Fixed 65KHz Fsw and OTP Protection
SF1531S SIFIRST-SF1531S Datasheet
63Kb / 2P
   管-BalanceTM Current Mode PWM Controller
SF5580 SIFIRST-SF5580 Datasheet
82Kb / 2P
   HV-mWTM?곊?BalanceTM PWM Controller Fixed 65KHz Fsw
SF1585 SIFIRST-SF1585 Datasheet
63Kb / 2P
   Cost Effective, High Power, 管-BalanceTM PWM Controller
More results


Html Pages

1 2


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com