- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄363216 > NCP1207A (ON SEMICONDUCTOR) PWM Current Mode Controller for Free Running Quasi Resonant Operation(電流模式控制的PWM控制器，用于自由振蕩的“準(zhǔn)諧振”操作) PDF資料下載
參數(shù)資料
| 型號： | NCP1207A |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | PWM Current Mode Controller for Free Running Quasi Resonant Operation(電流模式控制的PWM控制器，用于自由振蕩的“準(zhǔn)諧振”操作) |
| 中文描述： | PWM電流模式控制器運(yùn)行準(zhǔn)諧振操作（電流模式控制的脈寬調(diào)制控制器，用于自由振蕩的“準(zhǔn)諧振”操作免費(fèi)） |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 239K |
| 代理商： | NCP1207A |
Semiconductor Components Industries, LLC, 2005
September, 2005 Rev. 2
1
Publication Order Number:
NCP1207A/D
NCP1207A
PWM CurrentMode
Controller for Free Running
QuasiResonant Operation
The NCP1207A combines a true current mode modulator and a
demagnetization detector to ensure full borderline/critical Conduction
Mode in any load/line conditions and minimum drain voltage switching
(QuasiResonant operation). Due to its inherent skip cycle capability,
the controller enters burst mode as soon as the power demand falls
below a predetermined level. As this happens at low peak current, no
audible noise can be heard. An internal 8.0 s timer prevents the
freerun frequency to exceed 100 kHz (therefore below the 150 kHz
CISPR22 EMI starting limit), while the skip adjustment capability lets
the user select the frequency at which the burst foldback takes place.
The Dynamic SelfSupply (DSS) drastically simplifies the
transformer design in avoiding the use of an auxiliary winding to
supply the NCP1207A. This feature is particularly useful in
applications where the output voltage varies during operation (e.g.
battery chargers). Due to its highvoltage technology, the IC is
directly connected to the highvoltage DC rail. As a result, the
shortcircuit trip point is not dependent upon any V
CC
auxiliary level.
The transformer core reset detection is done through an auxiliary
winding which, brought via a dedicated pin, also enables fast
Overvoltage Protection (OVP). Once an OVP has been detected, the
IC permanently latches off.
Finally, the continuous feedback signal monitoring implemented
with an overcurrent fault protection circuitry (OCP) makes the final
design rugged and reliable.
Features
FreeRunning Borderline/Critical Mode QuasiResonant Operation
CurrentMode with Adjustable SkipCycle Capability
No Auxiliary Winding V
CC
Operation
AutoRecovery Overcurrent Protection
Latching Overvoltage Protection
External Latch Triggering, e.g. Via Overtemperature Signal
500 mA Peak Current Source/Sink Capability
Undervoltage Lockout for VCC Below 10 V
Internal 1.0 ms SoftStart
Internal 8.0 s Minimum T
OFF
Adjustable Skip Level
Internal Temperature Shutdown
Direct Optocoupler Connection
SPICE Models Available for TRANsient Analysis
PbFree Packages are Available
Typical Applications
AC/DC Adapters for Notebooks, etc.
Offline Battery Chargers
Consumer Electronics (DVD Players, SetTop Boxes, TVs, etc.)
Auxiliary Power Supplies (USB, Appliances, TVs, etc.)
MARKING
DIAGRAM
1207A/P = Device Code
A
= Assembly Location
L, WL
= Wafer Lot
Y, YY
= Year
W, WW
= Work Week
= PbFree Package
G
= PbFree Package
http://onsemi.com
PDIP8
N SUFFIX
CASE 626
1
8
1
8
SOIC8
D1, D2 SUFFIX
CASE 751
1
8
5
3
4
Dmg
CS
HV
PIN CONNECTIONS
7
6
2
NC
FB
GND
Drv
V
CC
1207AP
AWL
YYWWG
1
8
Device
Package
Shipping
ORDERING INFORMATION
NCP1207ADR2
SOIC8
2500/Tape & Reel
NCP1207AP
PDIP8
50 Units / Rail
NCP1207ADR2G
SOIC8
(PbFree)
2500/Tape & Reel
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.
1207A
ALYW
1
8
NCP1207APG
PDIP8
(PbFree)
50 Units / Rail
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NCP1207B | PWM Current-Mode Controller for Free Running Quasi-Resonant Operation |
| NCP1207BDR2G | PWM Current-Mode Controller for Free Running Quasi-Resonant Operation |
| NCP1207 | PWM Current-Mode Controller for Free Running Quasi-Resonant Operation(電流模式控制的PWM控制器，用于自由振蕩的“準(zhǔn)諧振”操作) |
| NCP1209 | PWM Voltage Mode Controller(電壓模式控制的PWM控制器) |
| NCP1212DR2G | Current Mode PWM Controller for Both Forward and Flyback Converters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| NCP1207A_07 | 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_10 | 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 |
| NCP1207AADAPGEVB | 功能描述:電源管理IC開發(fā)工具 NCP1207A 24 W RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| NCP1207ADR2 | 功能描述:電流型 PWM 控制器 Quasi Resonant RoHS:否 制造商:Texas Instruments 開關(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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。