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NCP12400AAAAB1

更新时间： 2024-12-01 02:11:23
品牌 Logo 应用领域
安森美 - ONSEMI /
页数 文件大小 规格书
46页 4913K
描述
Fixed Frequency Current Mode Controller for Flyback Converters

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NCP12400AAAAB1 数据手册

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Fixed Frequency Current  
Mode Controller for Flyback  
Converters  
NCP12400  
The NCP12400 is a new fixed−frequency current−mode controller  
featuring the Dynamic Self−Supply. This function greatly simplifies  
www.onsemi.com  
the design of the auxiliary supply and the V capacitor by activating  
CC  
the internal startup current source to supply the controller during  
start−up, transients, latch, stand−by etc. This device contains a special  
HV detector which detects the application unplug from the ac input  
line and triggers the X2 discharge current. This HV structure allows  
the brown−out detection as well.  
SOIC−7  
It features a timer−based fault detection that ensures the detection of  
overload and an adjustable compensation to help keep the maximum  
power independent of the input voltage.  
Due to frequency foldback, the controller exhibits excellent  
efficiency in light load condition while still achieving very low  
standby power consumption. Internal frequency jittering, ramp  
compensation, and a versatile latch input make this controller an  
excellent candidate for the robust power supply designs.  
CASE 751U  
MARKING DIAGRAM  
8
XXXXX  
ALYWG  
G
1
A dedicated Off Mode allows to reach the extremely low no load  
input power consumption via “sleeping” whole device and thus  
minimize the power consumption of the control circuitry.  
400VWXYZf  
= Specific Device Code  
(see page 2)  
= Assembly Location  
= Wafer Lot  
= Year  
= Work Week  
A
L
Y
W
G
Features  
• Fixed−Frequency Current−Mode Operation 65 kHz or 100 kHz  
Frequency Options  
= Pb−Free Package  
• Frequency Foldback then Skip Mode for Maximized Performance  
(Note: Microdot may be in either location)  
in Light Load and Standby Conditions  
• Timer−Based Overload Protection with Latched (Option A) or  
Autorecovery (Option B) Operation  
PIN CONNECTIONS  
1
4
8
5
• High−Voltage Current Source with Brown−Out Detection and  
FAULT  
FB  
HV  
Dynamic Self−Supply, Simplifying the Design of the V Circuitry  
CC  
• Frequency Modulation for Softened EMI Signature  
CS  
V
CC  
• Adjustable Overpower Protection Dependant on the Mains Voltage  
• Fault Input for Overvoltage and Over Temperature Protection  
GND  
DRV  
(Top View)  
• V Operation up to 28 V, with Overvoltage Detection  
CC  
• 300/500 mA Source/Sink Drive Peak Current Capability  
• 4/10 ms Soft−Start  
ORDERING INFORMATION  
See detailed ordering and shipping information on page 43 of  
this data sheet.  
• Internal Thermal Shutdown  
• No−Load Standby Power < 30 mW  
• X2 Capacitor in EMI Filter Discharging Feature  
• These are Pb−Free Devices  
Typical Applications  
• Offline Adapters for Notebooks, LCD, and Printers  
• Offline Battery Chargers  
• Consumer Electronic Power Supplies  
• Auxiliary/Housekeeping Power Supplies  
• Offline Adapters for Notebooks  
© Semiconductor Components Industries, LLC, 2017  
1
Publication Order Number:  
October, 2019 − Rev. 5  
NCP12400/D  
1234567...46

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