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參數(shù)資料
| 型號： | NCP1207 |
| 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“準諧振”操作) |
| 中文描述： | PWM電流模式控制器上運行的免費準諧振操作（電流模式控制的脈寬調制控制器，用于自由振蕩的“準諧振”操作） |
| 文件頁數(shù)： | 1/18頁 |
| 文件大?。?/td> | 203K |
| 代理商： | NCP1207 |
Semiconductor Components Industries, LLC, 2004
October, 2004 Rev. 8
1
Publication Order Number:
NCP1207/D
NCP1207
PWM CurrentMode
Controller for Free Running
QuasiResonant Operation
The NCP1207 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 NCP1207. 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 (OCP) circuitry makes the final design
rugged and reliable.
Features
PbFree Packages are Available*
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
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
Typical Applications
ACDC Adapters for Notebooks, etc.
Offline Battery Chargers
Consumer Electronics (DVD Players, SetTop Boxes, TVs, etc.)
Auxiliary Power Supplies (USB, Appliances, TVs, etc.)
*For additional information on our PbFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
PDIP8
N SUFFIX
CASE 626
1
8
1
8
SOIC8
D1, D2 SUFFIX
CASE 751
1
8
5
3
4
(Top View)
DMG
CS
HV
PIN CONNECTIONS
7
6
2
NC
FB
GND
Drv
V
CC
MARKING
DIAGRAMS
8
1207/P = Device Code
A
= Assembly Location
WL, L
= Wafer Lot
YY, Y
= Year
WW, W = Work Week
1207
ALYW
1207P
AWL
YYWW
1
8
http://onsemi.com
Device
Package
Shipping
ORDERING INFORMATION
NCP1207DR2
SOIC8
2500/Tape & Reel
NCP1207P
PDIP8
50 Units/Tube
NCP1207DR2G
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.
1
NCP1207PG
PDIP8
(PbFree)
50 Units/Tube
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| 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 |
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