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參數(shù)資料
| 型號(hào)： | NCP1207ADR2 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | PWM Current-Mode Controller for Free Running Quasi-Resonant Operation |
| 中文描述： | 0.5 A SWITCHING CONTROLLER, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大?。?/td> | 197K |
| 代理商： | NCP1207ADR2 |
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Semiconductor Components Industries, LLC, 2004
November, 2004 Rev. 1
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 Package is 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.)
PDIP8
N SUFFIX
CASE 626
1
8
1
8
SO8
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
1207A/P = Device Code
A
= Assembly Location
WL, L
= Wafer Lot
YY, Y
= Year
WW, W
= Work Week
1207AP
AWL
YYWW
1
8
Device
Package
Shipping
ORDERING INFORMATION
NCP1207ADR2
SOIC8
2500/Tape & Reel
NCP1207AP
PDIP8
50 Units/Tube
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.
http://onsemi.com
1207A
ALYW
1
8
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PDF描述 |
|---|---|
| NCP1207ADR2G | PWM Current-Mode Controller for Free Running Quasi-Resonant Operation |
| NCP1207A | 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) |
| 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) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCP1207ADR2G | 功能描述:電流型 PWM 控制器 Quasi Resonant Current Mode 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 |
| NCP1207AP | 功能描述:電流型 PWM 控制器 Quasi Resonant 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 |
| NCP1207APG | 功能描述:電流型 PWM 控制器 Quasi Resonant Current Mode 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 |
| NCP1207B | 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 |
| NCP1207BDR2G | 功能描述:電流型 PWM 控制器 ANA QUASI RESNT SMPS 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 |
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