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Updated at 17/06/2025 10:30:15(UTC+8)

Certifications

ManyChip is committed to product quality and safety with ISO 9001, ISO 13485, ISO 45001, UL, RoHS, CQC and REACH certifications.

Description

The NCP1351 is a current−mode controller targeting low power off−line flyback Switched Mode Power Supplies (SMPS) where cost is of utmost importance. Based on a fixed peak current technique (quasi−fixed TON), the controller decreases its switching frequency as the load becomes lighter. As a result, a power supply using the NCP1351 naturally offers excellent no−load power consumption, while optimizing the efficiency in other loading conditions. When the frequency decreases, the peak current is gradually reduced down to approximately 30% of the maximum peak current to prevent transformer mechanical resonance. The risk of acoustic noise is thus
greatly diminished while keeping good standby power performance.
Features
•Quasi−fixed TON, Variable TOFF Current Mode Control
•Extremely Low Current Consumption at Startup
•Peak Current Compression Reduces Transformer Noise
•Primary or Secondary Side Regulation
•Dedicated Latch Input for OTP, OVP
•Programmable Current Sense Resistor Peak Voltage
•Natural Frequency Dithering for Improved EMI Signature
•Easy External Over Power Protection (OPP)
•Undervoltage Lockout
•Very Low Standby Power via Off−time Expansion
•Internal Temperature Shutdown
•SOIC−8 Package

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NCP1351BDR2G Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Surface Mount
Number of Pins	8 Pin
Case/Package	SOIC-8
Frequency	65 kHz
Supply Voltage (DC)	6.00V (min)
Halogen Free Status	Halogen Free
Number of Outputs	1 Output
Input Voltage (DC)	12.0 V
Output Voltage	20 V
Output Current	400 mA
Number of Positions	8 Position
Rise Time	90 ns
Topology	Flyback
Thermal Resistance	176 ℃/W
Fall Time	100 ns
Operating Temperature (Max)	150 ℃
Operating Temperature (Min)	-25 ℃
Supply Voltage	28 V
Supply Voltage (Max)	22 V
Supply Voltage (Min)	6 V
Input Voltage	12 V
	Show
Size-Length	5 mm
Size-Width	4 mm
Size-Height	1.5 mm
Operating Temperature	-25℃ ~ 125℃ (TJ)
Product Lifecycle Status	Active
Packaging	Tape & Reel (TR)
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance Edition	2015/12/17
ECCN Code	EAR99

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(Additional charges ($35-$50) may apply for delivery in these areas)
- Delivery date: usually 2 to 7 working days.
- A tracking number will be sent after your order ships.
- Carefully inspected and packed by ManyChip warehouse
- Vacuum packaging
- Anti-static packaging
- Shockproof foam
The terms here are for reference only, the actual terms are subject to the sales quotation.
- Please confirm product specifications when ordering.
- MOQ refers to the minimum order quantity required to purchase each part.
- If you have special ordering instructions, please indicate them on the ordering page.
- Inspection (PSI) will be performed prior to shipment.
- Income Quality Control (IQC), 1000+ qualified dealers.
- Chips are tested by authoritative organizations to ensure the quality, authenticity and safety of your device.
- Decapsulation control
- X-ray control
- XRF inspection
- Electrical testing
- Surface testing
-Digital components warehouse, covering an area of 800 square meters, with constant temperature and humidity

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