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Name: NCP4306AAHZZZADR2G
Brand: ON Semiconductor
SKU: NCP4306AAHZZZADR2G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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ON Semiconductor NCP4306AAHZZZADR2G

Part No.:: NCP4306AAHZZZADR2G

Manufacturer:: ON Semiconductor

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

Datasheet:: NCP4306AAHZZZADR2G.pdf

Description:: SECONDARY SIDE SYNCHRONOU

In Stock:: 2500

Quantity:: Add To Cart

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NCP4306AAHZZZADR2G Typical application Circuitry

NCP4306AAHZZZADR2G

NCP4306AAHZZZADR2G is a synchronous rectification controller designed by ON Semiconductor, aimed at improving efficiency in switch-mode power supplies (SMPS), particularly in applications like AC-DC adapters, server and desktop power supplies, and telecommunication equipment.

Application Scenario: AC-DC Adapter for Laptop Computers

A common application for the NCP4306AAHZZZADR2G is in the secondary side of AC-DC power adapters for laptops, where it controls synchronous MOSFETs to provide efficient rectification of the AC input to DC output.

Parameter Features

- Adaptive Gate Drive Timing: Adjusts the timing of the MOSFET gate drive signals to optimize efficiency.

- Wide VCC Operating variety: Accommodates a wide variety of power levels and supply voltages.

- Maximized Efficiency: Through synchronous rectification, it significantly reduces power losses compared to traditional diode rectification.

- Built-in protection features: To guarantee safe operation under unusual circumstances, over-voltage protection (OVP) and under-voltage lockout (UVLO) are included.

Detailed Circuit Connection for AC-DC Adapter

Rectification Stage Configuration

Integrate the NCP4306AAHZZZADR2G into the secondary side of the AC-DC converter by connecting its VCC pin (Pin 1) to the secondary side positive rail. This setup powers the controller and prepares it to manage the synchronous rectification process.

Synchronous MOSFET Gate Control

Connect the GATE driver outputs (Pins 5 and 6) of the NCP4306AAHZZZADR2G to the gates of the synchronous rectification MOSFETs. These connections are pivotal for turning the MOSFETs on and off at the correct times to conduct current during the appropriate phase of the AC cycle, thus replacing the traditional diode rectifiers.

Feedback and Sensing

Utilize the CS pin (Pin 2) for connecting a current-sense resistor or transformer to provide feedback related to the output current. This information allows the NCP4306AAHZZZADR2G to optimize the timing of the gate drive signals, enhancing efficiency.

Protection Features Activation

Ensure proper configuration of the UVLO and OVP functions by connecting the appropriate resistive dividers to the VCC and feedback pins, safeguarding the power supply and the load against under-voltage and over-voltage conditions.

Design Considerations

When designing an AC-DC adapter circuit with the NCP4306AAHZZZADR2G, several important factors need to be considered:

- MOSFET Selection: Choose synchronous MOSFETs with low RDS(on) to minimize conduction losses and support the efficiency goals set by using the NCP4306AAHZZZADR2G.

- Timing Adjustment: Fine-tune the adaptive gate drive timing to match the specific transformer and MOSFET characteristics used in the design, optimizing rectification efficiency.

- Thermal Management: Despite the efficiency improvements, closely monitor the thermal performance of the MOSFETs and the NCP4306AAHZZZADR2G itself, especially in compact adapter designs where heat dissipation might be challenging.

- Layout Considerations: Carefully plan the PCB layout to minimize the loop areas associated with high-current paths and to ensure robust ground connections, reducing potential EMI and ensuring stable operation.

Incorporating the NCP4306AAHZZZADR2G into the design of AC-DC adapters for laptops allows for the creation of more efficient, cooler-running, and potentially more compact power supplies, directly benefiting both the performance and portability of the end devices.

NCP4306AAHZZZADR2G information

NCP4306AAHZZZADR2G Specifications

Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
-
ProductStatus:
Active
Applications:
Secondary-Side Controller, Synchronous Rectifier
Voltage-Input:
-
Voltage-Supply:
35V
Current-Supply:
1.4 mA
OperatingTemperature:
-40°C ~ 125°C (TJ)
MountingType:
Surface Mount

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