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参数资料
| 型号： | NCP1207DR2 |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | 稳压器 |
| 英文描述： | PWM Current-Mode Controller for Free Running Quasi-Resonant Operation |
| 中文描述： | 0.5 A SWITCHING CONTROLLER, PDSO8 |
| 封装： | SOIC-8 |
| 文件页数： | 1/18页 |
| 文件大小： | 202K |
| 代理商： | NCP1207DR2 |
Semiconductor Components Industries, LLC, 2004
June, 2004 Rev. 6
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 latchesoff.
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
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
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
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.
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| NCP1207P | 功能描述:IC CTRLR PWM CM OVP OCP HV 8DIP RoHS:否 类别:集成电路 (IC) >> PMIC - AC-DC 转换器，离线开关 系列:- 标准包装:1 系列:FPS™ 输出隔离:隔离 频率范围:61kHz ~ 73kHz 输入电压:8 V ~ 26 V 输出电压:650V 功率（瓦特）:12W 工作温度:-40°C ~ 115°C 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-MDIP 包装:Digi-Reel® 其它名称:FSL206MRBNFSDKR |
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