NCP1234AD65R2G Fixed Frequency Current Mode Controller for Flyback Converters
manufacturer:
ON Semi / Catalyst Semi
Description:
Converter Offline Flyback Topology 65kHz 7-SOIC
Category:
Power Management ICs
Price:
Negotiate
Payment Method:
T/T, Western Union, Paypal
Specifications
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
Highlight:
integrated circuit ic
,integrated circuit components
Introduction
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 No | Pin Name | Function | Pin Description |
|---|---|---|---|
| 1 | LATCH | Latch−Off Input | Pull 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 |
| 2 | FB | Feedback | An optocoupler collector to ground controls the output regulation. |
| 3 | CS | Current Sense | This Input senses the Primary Current for current−mode operation, and Offers an overpower compensation adjustment. |
| 4 | GND | IC Ground | |
| 5 | DRV | Drive output | Drives external MOSFET |
| 6 | VCC | VCC input | This supply pin accepts up to 28 Vdc, with overvoltage detection |
| 7 | |||
| 8 | HV | High−voltage pin | Connects 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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Stock:
MOQ:
10pcs