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Name: NCP1271D65R2G
Brand: ON Semiconductor
SKU: NCP1271D65R2G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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ON Semiconductor NCP1271D65R2G

Part No.:: NCP1271D65R2G

Manufacturer:: ON Semiconductor

Package:: 8-SOIC (0.154, 3.90mm Width), 7 Leads

Datasheet:: NCP1271D65R2G.pdf

Description:: IC OFFLINE SWITCH FLYBACK 7SOIC

In Stock:: 3468

Quantity:: Add To Cart

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NCP1271D65R2G Typical application Circuitry

NCP1271D65R2G

The NCP1271D65R2G is a versatile PWM controller integrated circuit primarily used in Switched Mode Power Supplies (SMPS). It is designed to provide a high-efficiency power conversion, which is essential in applications like AC-DC adapters, off-line battery chargers, and auxiliary power supplies in consumer electronics, PCs, and servers.

Application Scenario: AC-DC Adapter

A typical application of the NCP1271D65R2G is in an AC-DC adapter, where it plays a central role in converting AC mains voltage into a stable DC output, efficiently powering devices or charging batteries.

Parameter Features

The NCP1271D65R2G is characterized by:

- Adjustable Switching Frequency: Allows optimization of the transformer size and efficiency.

- Integrated Overvoltage, Overload, and Short Circuit Protection: Increases power supply dependability and safety.

- Green Mode Operation: Reduces power consumption under light-load or no-load conditions.

Circuit Connection Detail

Incorporating the NCP1271D65R2G into an AC-DC adapter involves meticulous attention to the following pin connections:

1. High Voltage Input (HV) Pin (Pin 1): Connect this pin to the rectified and filtered AC mains voltage. It's crucial to ensure that this voltage is stable and well-regulated for the proper functioning of the NCP1271D65R2G.

2. System Ground (GND) Pin (Pin 2): Attach this pin to the system ground. The NCP1271D65R2G's noise immunity and operational stability depend on a low-resistance path to the ground.

3. Feedback (FB) Pin (Pin 3): Connect this pin to the voltage feedback network. It's essential for regulating the output voltage and maintaining tight control over the voltage supplied to the load.

4. Drive (DR) Pin (Pin 4): This pin connects to the gate of the power switch (usually a MOSFET). The drive signal from this pin controls the switching of the power switch, effectively regulating the energy transferred to the transformer and then to the load.

Design Considerations

When designing a circuit with the NCP1271D65R2G, several crucial factors must be considered:

- EMI and Noise Reduction: Switching power supplies can generate electromagnetic interference (EMI). It's essential to design the layout to minimize EMI, using techniques like proper grounding, shielding, and the use of EMI filters.

- Thermal Management: The NCP1271D65R2G can generate heat during operation. Ensure proper thermal management to maintain performance and reliability, especially at higher loads.

- Component Selection: The choice of external components, especially the transformer, diodes, and capacitors, is crucial. They must be of high quality and suitable for the switching frequencies and power levels of the application.

In conclusion, the NCP1271D65R2G is a highly efficient PWM controller, ideal for applications requiring stable and efficient power conversion, such as AC-DC adapters. A well-thought-out circuit design, taking into account aspects like EMI and noise reduction, thermal management, and careful component selection, is essential to fully harness the capabilities of the NCP1271D65R2G.

NCP1271D65R2G information

NCP1271D65R2G Specifications

Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
Soft-Skip™
ProductStatus:
Not For New Designs
OutputIsolation:
Isolated
InternalSwitch(s):
No
Voltage-Breakdown:
-
Topology:
Flyback
Voltage-StartUp:
12.6 V
Voltage-Supply(Vcc/Vdd):
10V ~ 20V
DutyCycle:
80%
Frequency-Switching:
65kHz
Power(Watts):
-
FaultProtection:
Current Limiting, Over Load, Over Voltage, Short Circuit
ControlFeatures:
-
OperatingTemperature:
-40°C ~ 125°C (TJ)

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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

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