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CHONGMING GROUP (HK) INT'L CO., LTD.
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NCP1234AD65R2G Fixed Frequency Current Mode Controller for Flyback Converters

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ChongMing Group (HK) Int'l Co., Ltd

City: shenzhen

Country/Region:china

Tel:86-755-88367702

Contact Person:
Ms.Doris Guo View Contact Details

NCP1234AD65R2G Fixed Frequency Current Mode Controller for Flyback Converters

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Model Number NCP1234AD65R2G
Certification new & original
Place of Origin original factory
Minimum Order Quantity 10pcs
Price Negotiate
Payment Terms T/T, Western Union, Paypal
Supply Ability 8400pcs
Delivery Time 1 day
Packaging Details Please contact me for details
Description Converter Offline Flyback Topology 65kHz 7-SOIC
Max working temperature +125°C
Min working temperature -40°C
switching frequency 65 kHz
current output 500 mA
packing reel
package SOIC-7
VDD POWER 28V
factory packing quantity 2500
Detailed Product Description

NCP1234AD65R2G Fixed Frequency Current Mode Controller for Flyback Converters

 

Features

Fixed−Frequency Current−Mode Operation with Built−In Ramp Compensation

65 kHz or 100 kHz Oscillator Frequency version

Frequency Foldback then Skip Mode for Maximized Performance in Light Load and Standby Conditions 

Timer−Based Overload Protection with Latched (option A) or Auto−Recovery (option B) Operation

High−voltage Current Source with Dynamic Self−Supply, Simplifying the Design of the VCC Capacitor Frequency Modulation for Softened EMI Signature, including during Frequency Foldback mode

Adjustable Overpower Compensation  

Latch−off Input for Severe Fault Conditions, Allowing Direct Connection of an NTC for Overtemperature Protection (OTP)

VCC Operation up to 28 V, with Overvoltage Detection 500 mA Peak Source/Sink Current Drive Capability

4.0 ms Soft−Start

Internal Thermal Shutdown

Pin−to−Pin Compatible with the Existing NCP12xx Series

These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant

 

 

 

Typical Applications

AC−DC Adapters for Notebooks, LCD, and Printers

Offline Battery Chargers

Consumer Electronic Power Supplies

 Auxiliary/Housekeeping Power Supplies

 

 

 

 

 

PIN FUNCTION DESCRIPTION

 

Pin NoPin NameFunctionPin Description
1LATCHLatch−Off InputPull the pin up or down to latch−off the controller. An internal current source allows the direct connection of an NTC for over temperature detection
2FBFeedbackAn optocoupler collector to ground controls the output regulation.
3CSCurrent SenseThis Input senses the Primary Current for current−mode operation, and Offers an overpower compensation adjustment.
4GND IC Ground
5DRVDrive outputDrives external MOSFET
6VCCVCC inputThis supply pin accepts up to 28 Vdc, with overvoltage detection
7   
8HVHigh−voltage pinConnects to the bulk capacitor or the rectified AC line to perform the functions of Start−up Current Source and Dynamic Self−Supply

 

 

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