NCP1251ASN65T1G - ON Semiconductor

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

NCP1251ASN65T1G
Manufacturer

ON Semiconductor
ChipWorker Part#

CW19526070
Category

AC to DC Converter, AC/DC Power Module
Package

TSOT-23-6
Description

Current Mode PWM Controller 500mA 65kHz 6Pin TSOP T/R
Documentation

Datasheet

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NCP1251ASN65T1G Specifications

Attribute	Attribute Value

Part Number	NCP1251ASN65T1G
Manufacturer	ON Semiconductor
ChipWorker Part#	CW19526070
Category	AC to DC Converter, AC/DC Power Module
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	6 Pin
Case/Package	TSOT-23-6
Frequency	65 kHz
Halogen Free Status	Halogen Free
Input Voltage (DC)	28.0 V
Output Voltage	28.3 V
Output Current	500 mA
Number of Positions	6 Position
Rise Time	40 ns
Switching Frequency	65 kHz
Topology	Flyback
Duty Cycle	80 %
Maximum Duty Cycle	80 %
Fall Time	30 ns
Operating Temperature (Max)	150 ℃
Operating Temperature (Min)	-40 ℃
Input Voltage	28 V
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Size-Length	3.1 mm
Size-Width	1.7 mm
Size-Height	1 mm
Operating Temperature	-40℃ ~ 125℃ (TJ)
Product Lifecycle Status	Active
Packaging	Tape & Reel (TR)
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
ECCN Code	EAR99

Product Description

Current-Mode PWM Controller for Off-line Power Supplies
The NCP1251 is a highly integrated PWM controller capable of delivering a rugged and high performance offline power supply in a tiny TSOP−6 package. With a supply range up to 28 V, the controller hosts a jittered 65 kHz or 100 kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the controller automatically folds back its switching frequency down to a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while limiting the peak current.
**Features**
• Fixed−Frequency 65 or 100 kHz Current−Mode Control Operation
• Internal and Adjustable Over Power Protection (OPP) Circuit
• Frequency Foldback Down to 26 kHz and Skip−Cycle in Light Load Conditions
• Internal Ramp Compensation
• Internal Fixed 4 ms Soft−Start
• 100 ms Timer−Based Auto−Recovery Short−Circuit Protection
• Frequency Jittering in Normal and Frequency Foldback Modes
• Option for Auto−Recovery or Latched Short−Circuit Protection
• OVP Input for Improved Robustness
• Up to 28 V VCC Operation
• Latched OVP Protection on VCC
• +300 mA / −500 mA Source/Sink Drive Capability
• Less than 100 mW Standby Power at High Line
• EPS 2.0 Compliant
• These are Pb−Free Devices
**Typical Applications**
• ac−dc Converters for TVs, Set−top Boxes and Printers
• Offline Adapters for Notebooks and Netbooks

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