參數(shù)資料
型號(hào)： NCP1280
廠商： ON SEMICONDUCTOR
英文描述： Active Clamp Voltage Mode PWM Controller for Off-Line Applications
中文描述： 有源鉗位電壓模式PWM控制器，用于離線應(yīng)用
文件頁(yè)數(shù)： 1/18頁(yè)
文件大小： 129K
代理商： NCP1280
Semiconductor Components Industries, LLC, 2004
April, 2004 Rev. 1
1
Publication Order Number
NCP1280/D
NCP1280
Active Clamp Voltage Mode
PWM Controller for OffLine
Applications
The NCP1280 provides a highly integrated solution for offline
power supplies requiring highefficiency and low parts count. This
voltage mode controller provides control outputs for driving a forward
converter primary MOSFET and an auxiliary MOSFET for active
clamp circuit. The second output with its programmable delay can also
be used for driving a synchronous rectifier on the secondary or for
asymmetric half bridge circuits. Incorporation of high voltage startup
circuitry (with 700 V capability) reduces parts count and system
power dissipation. Additional features such as line UV/OV protection,
soft start, single resistor programmable (high) frequency oscillator,
line voltage feedforward, dual mode overcurrent protection and
maximum duty cycle control, allow converter optimization at minimal
cost. Compared to a traditional forward converter, an NCP1280 based
converter can offer significant efficiency improvements and system
cost savings.
Features
Internal High Voltage StartUp Regulator (25 V to 700 V)
Dual Control Outputs with Adjustable Overlap Delay
Programmable Maximum Duty Cycle Control
Single Resistor Oscillator Frequency Setting
Fast Line Feedforward
Line Under/Overvoltage Lockout
Dual Mode Overcurrent Protection
Programmable Soft Start
Precision 5.0 V Reference
Typical Applications
OffLine Power Converters in 100500 W Range
Desktop Power Supplies (HighEnd)
Industrial Power Supplies
Plasma/LCD TV FrontEnd
TX1
NCP1280
+
Driver
Opto
Error
Amplifier
Startup
Feedforward
(100 V 425 V)
UV/OV
Overlap
Delay
+
V
in
V
out
(3.3 V)
C
out
L
out
Figure 1. Forward Converter for Offline Applications Using PFC Inputs
C
clamp
OUT1
OUT2
V
in
FF
t
D
Drive
SR
Device
Package
Shipping
ORDERING INFORMATION
NCP1280DR2
SO16
2500/Tape & Reel
NCP1280= Device Code
A
= Assembly Location
WL
= Wafer Lot
Y
= Year
WW
= Work Week
MARKING
DIAGRAM
16
SO16
D SUFFIX
CASE 751B
NCP1280
AWLYWW
1
1
16
http://onsemi.com
PIN CONNECTIONS
SS
DC
MAX
1
16
V
EA
R
T
V
REF
C
SKIP
t
D
CS
OUT2
FF
GND
UV/OV
OUT1
NC
V
AUX
V
in
For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NCP1280/D 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Active Clamp Voltage Mode PWM Controller For Off-Line Applications
NCP1280_05 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Active Clamp Voltage Mode PWM Controller for Off-Line Applications
NCP1280DR2 功能描述:電壓模式 PWM 控制器 Active Clamp RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
NCP1280DR2G 功能描述:電壓模式 PWM 控制器 Active Clamp Voltage Mode PWM RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
NCP1282 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Power Factor Controllers
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