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參數資料
| 型號： | NCP1378 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation |
| 中文描述： | PWM電流模式控制器自由運行準諧振操作 |
| 文件頁數： | 1/16頁 |
| 文件大?。?/td> | 152K |
| 代理商： | NCP1378 |
Semiconductor Components Industries, LLC, 2004
October, 2004 Rev. 1
1
Publication Order Number:
NCP1378/D
NCP1378
PWM CurrentMode
Controller for FreeRunning
QuasiResonant Operation
The NCP1378 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 transformer core reset detection is done through an auxiliary
winding which, brought via a dedicated pin, also enables fast Over
Voltage Protection (OVP). Once an OVP has been detected, the IC
permanently latches off.
The NCP1378 also features an efficient protective circuitry that, in
presence of an overcurrent condition, disables the output pulses and
enters a safe burst mode, trying to restart. Once the default has gone,
the device autorecovers. Finally an internal 1.0 ms SoftStart
eliminates the traditional startup stress.
The NCP1378 is tailored for low voltage applications having
UVLO thresholds of 8.4 V (on) and 7.5 V (off).
Features
PbFree Package is Available*
FreeRunning Borderline/Critical Mode QuasiResonant Operation
Latched Overvoltage Protection
AutoRecovery ShortCircuit Protection Via UVLO Crossover
CurrentMode with Adjustable Skip Cycle Capability
Internal 1.0 ms SoftStart
Internal Temperature Shutdown
Internal Leading Edge Blanking
500 mA Peak Current Source/Sink Capability
External Latch Triggering, e.g. Via Overtemperature Signal
Direct Optocoupler Connection
SPICE Models Available for TRANsient Analysis
Internal 8.0 s Minimum T
OFF
Typical Applications
BatteryBased Operations
*For additional information on our PbFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques Reference
Manual, SOLDERRM/D.
SOIC8
D SUFFIX
CASE 751
PIN CONNECTIONS
Device
Package
Shipping
ORDERING INFORMATION
NCP1378DR2
SOIC8
2500 Tape & Reel
MARKING
DIAGRAMS
A
WL, L
YY, Y
WW, W = Work Week
= Assembly Location
= Wafer Lot
= Year
1
8
1
8
PDIP7
P SUFFIX
CASE 626B
1
Dmg
8 HV
2
FB
3
CS
4
GND
6 V
CC
5 Drv
(Top View)
NCP1378P
PDIP7
50 Units/Tube
1378
ALYW
1378P
AWL
YYWW
1
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.
NCP1378PG
PDIP7
(PbFree)
50 Units/Tube
1
8
http://onsemi.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| NCP1378/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 Free Running Quasi-Resonant Operation |
| NCP1378_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 |
| NCP1378DR2 | 功能描述:電流型 PWM 控制器 Quasi Resonant RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| NCP1378DR2G | 功能描述:電流型 PWM 控制器 Quasi Resonant Current Mode PWM RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| NCP1378P | 功能描述:電流型 PWM 控制器 Quasi Resonant RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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