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Name: NCP1253BSN65T1G
Brand: ON Semiconductor
SKU: NCP1253BSN65T1G
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 NCP1253BSN65T1G

Part No.:: NCP1253BSN65T1G

Manufacturer:: ON Semiconductor

Package:: -

Datasheet:: NCP1253BSN65T1G.pdf

Description:: IC PWM CTLR OCP AUTO

In Stock:: 240

Quantity:: Add To Cart

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NCP1253BSN65T1G Specifications

Packaging:
Tape & Reel (TR),Cut Tape (CT),Cut Tape (CT),Digi-Reel®,Digi-Reel®
Series:
*
ProductStatus:
Active
OutputIsolation:
-
InternalSwitch(s):
-
Voltage-Breakdown:
-
Topology:
-
Voltage-StartUp:
-
Voltage-Supply(Vcc/Vdd):
-
DutyCycle:
-
Frequency-Switching:
-
Power(Watts):
-
FaultProtection:
-
ControlFeatures:
-
OperatingTemperature:
-

NCP1253BSN65T1G this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including NCP1253BSN65T1G price, data-sheet, in-stock availability, technical difficulties. Also. Quickly Enter the access of compare listing to find out replaceable electronic parts. If you want to retrieve comprehensive data for NCP1253BSN65T1G to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.

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NCP1253BSN65T1G information

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NCP1253BSN65T1G Typical application Circuitry

NCP1253BSN65T1G

NCP1253BSN65T1G is a versatile and efficient PWM controller designed by ON Semiconductor, primarily utilized in switched-mode power supplies (SMPS) for applications such as desktop power supplies, LCD monitors, and LED lighting systems. Its adaptive switching frequency and comprehensive protection features make it well-suited for a wide range of power conversion applications that demand high efficiency and reliability.

Application Scenario: Desktop Power Supply

One notable application for the NCP1253BSN65T1G is in the power supply units (PSUs) of desktop computers, where it controls the conversion of AC mains power to the multiple DC voltages required by the computer's components.

Parameter Features

- Adjustable Switching Frequency: Facilitates optimization of efficiency and electromagnetic interference (EMI) performance across various load conditions.

- Auto-Recovery Protection Features: Includes over-current, over-voltage, and under-voltage lockout protections to enhance system reliability.

- Built-In Soft-Start: Minimizes inrush current during startup, reducing stress on the power supply components.

- Frequency Foldback: Reduces switching frequency under light-load conditions to improve efficiency.

Detailed Circuit Connection for Desktop Power Supply

AC Input Stage

Connect the AC mains input to a rectification and filtering stage, then link the resulting high-voltage DC bus to the VCC pin (Pin 8) of the NCP1253BSN65T1G to power the controller.

PWM Control and Drive

Connect the GATE pin (Pin 6) to the gate of a primary side MOSFET that is coupled with the main transformer. The PWM signal from the NCP1253BSN65T1G modulates this MOSFET to regulate energy transfer through the transformer according to the load demand.

Feedback Loop and Voltage Regulation

Establish a feedback mechanism from the secondary side of the transformer to the FB pin (Pin 4), using components such as optocouplers and voltage dividers to ensure precise regulation of the output voltages.

Protection Features Configuration

Utilize the CS pin (Pin 5) for current sensing, connecting it through a sense resistor to the source of the primary side MOSFET. This setup enables the NCP1253BSN65T1G to implement over-current protection by monitoring the MOSFET's drain current.

Design Considerations

When designing a desktop PSU with the NCP1253BSN65T1G, several critical factors need to be taken into account:

- Transformer and Components Selection: Carefully choose the transformer and other passive components to match the desired output power and efficiency requirements, considering the NCP1253BSN65T1G's operating frequency and capabilities.

- EMI and Noise Reduction: Implement proper layout and shielding techniques to minimize EMI, especially given the high switching frequencies involved. Utilize snubbers and filters where necessary to attenuate noise.

- Thermal Management: Assess the thermal performance of the PSU, paying particular attention to the NCP1253BSN65T1G, the MOSFET, and the transformer. Implement appropriate cooling strategies to maintain optimal temperatures.

- Protection Setpoints: Accurately set the protection thresholds for over-current, over-voltage, and under-voltage lockout to ensure the PSU operates safely under all conditions, without unnecessary tripping.

Incorporating the NCP1253BSN65T1G into the design of desktop PSUs allows engineers to develop power supplies that are efficient, reliable, and capable of meeting the demanding power requirements of modern desktop computers, enhancing the overall system stability and performance.

NCP1253BSN65T1G FAQ

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6. What is the process for return or replacement of NCP1253BSN65T1G?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the NCP1253BSN65T1G we delivered, we will accept the replacement or return of the NCP1253BSN65T1G only when all of the below conditions are fulfilled:

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

(2)We are informed of the defect described above within 90 days after the delivery of NCP1253BSN65T1G.

(3)The PartNo is unused and only in the original unpacked packaging.

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(1)Inform us within 90 days

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