參數(shù)資料
型號(hào)： NCP1205P2
廠商： ON SEMICONDUCTOR
元件分類(lèi)： 穩(wěn)壓器
英文描述： Single Ended PWM Controller Featuring QR Operation and Soft Frequency Foldback
中文描述： SWITCHING CONTROLLER, 125 kHz SWITCHING FREQ-MAX, PDIP14
封裝： PLASTIC, DIP-14
文件頁(yè)數(shù)： 1/20頁(yè)
文件大?。?/td> 163K
代理商： NCP1205P2
Semiconductor Components Industries, LLC, 2002
April, 2002 – Rev. 2
1
Publication Order Number:
NCP1205/D
NCP1205
Single Ended PWM
Controller Featuring QR
Operation and Soft
Frequency Foldback
The NCP1205 combines a true Current Mode Control modulator
and a demagnetization detector to ensure full Discontinuous
Conduction Mode in any load/line conditions and minimum drain
voltage switching (Quasi–Resonant operation, also called critical
conduction operation). With its inherent Variable Frequency Mode
(VFM), the controller decreases its operating frequency at constant
peak current whenever the output power demand diminishes.
Associated with automatic multiple valley switching, this unique
architecture guarantees minimum switching losses and the lowest
power drawn from the mains when operating at no–load conditions.
Thus, the NCP1205 is optimal for applications targeting the newest
International Energy Agency (IEA) recommendations for standby
power.
The internal High–Voltage current source provides a reliable
charging path for the V
CC
capacitor and ensures a clean and short
start–up sequence without deteriorating the efficiency once off.
The continuous feedback signal monitoring implemented with an
Over–Current fault Protection circuitry (OCP) makes the final design
rugged and reliable. An internal Over Voltage Protection (OVP) circuit
continuously monitors the V
CC
pin and stops the IC whenever its level
exceeds 36 V. The DIP14 offers an adjustable version of the OVP
threshold via an external resistive network.
Features
Natural Drain Valley Switching for Lower EMI and Quasi–Resonant
Operation (QR)
Smooth Frequency Foldback for Low Standby and Minimum Ripple
at Light–Load
Adjustable Maximum Switching Frequency
Internal 200 ns Leading Edge Blanking on Current Sense
250 mA Sink and Source Driver
Wide Operating Voltages: 8.0 to 36 V
Wide UVLO Levels: 7.2 to 15 V Typical
Auto–Recovery Internal Short–Circuit Protection (OCP)
Integrated 3.0 mA Typ. Start–Up Source
Current Mode Control
Adjustable Over–Voltage Level
Available in DIP8 and DIP14 Package
Applications
High Power AC/DC Adapters for Notebooks, etc.
Offline Battery Chargers
Power Supplies for DVD, CD Players, TVs, Set–Top Boxes, etc.
Auxiliary Power Supplies (USB, Appliances, etc.)
PDIP–14
P SUFFIX
CASE 646
14
MARKING
DIAGRAMS
A
WL = Wafer Lot
YY
= Year
WW = Work Week
= Assembly Location
1
1
14
NCP1205P2
AWLYYWW
PDIP–8
N SUFFIX
CASE 626
1
8
NCP1205P
AWL
YYWW
1
8
Device
Package
Shipping
ORDERING INFORMATION
NCP1205P
PDIP–8
50 Units/Rail
NCP1205P2
PDIP–14
25 Units/Rail
http://onsemi.com
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PDF描述
NCP1205 Single Ended PWM Controller Featuring QR Operation and Soft Frequency Foldback
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NCP1205P2G 功能描述:電流型 PWM 控制器 Single Ended Quasi Resonant PWM RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
NCP1205PG 功能描述:電流型 PWM 控制器 Single Ended Quasi Resonant PWM RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
NCP1207/D 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PWM Current-Mode Controller for Quasi-Resonant Operation
NCP1207A 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:PWM Current-Mode Controller for Free Running Quasi-Resonant Operation
NCP1207A_06 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:PWM Current−Mode Controller for Free Running Quasi−Resonant Operation
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