NCP4308QDR2G AC-DC Power Conversion by ON Semiconductor

Synchronous Rectifier Controller

Status: Unknown
Series: NCP4308
RoHS: Compliant
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The NCP4308 is a synchronous rectifier controller for switch mode power supplies. The controller enables high efficiency designs for flyback, quasi resonant flyback and LLC topologies. Externally adjustable minimum off−time and on−time blanking periods provides flexibility to drive various MOSFET package types and PCB layout. A reliable and noise less operation of the SR system is insured due to the Self Synchronization feature. The NCP4308 also utilizes Kelvin connection of the driver to the MOSFET to achieve high efficiency operation at full load. The precise turn−off threshold, extremely low turn−off delay time and high sink current capability of the driver allow the maximum synchronous rectification MOSFET conduction time. The high accuracy driver and 5 V gate clamp make it ideally suited for directly driving GaN devices. To provide more flexibility in PCB layout there are two versions of this product. NCP4308 does NOT have LLD function NCP43080 has LLD function

Where to Buy

Prices starting from US$0.33

Distributor Stock
Logo for Farnell
Farnell
from US$0.33
No stock
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Logo for Newark Electronics
Newark Electronics
from US$0.42
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Features

Self−Contained Control of Synchronous Rectifier in CCM, DCM and QR for Flyback or LLC Applications
Precise True Secondary Zero Current Detection
Rugged Current Sense Pin (up to 150 V)
Adjustable Minimum ON−Time
Adjustable Minimum OFF-Time with Ringing Detection
Adjustable Maximum ON−Time for CCM Controlling of Primary QR Controller
Operating Voltage Range up to VCC = 35 V
8 A / 4 A Peak Current Sink / Source Drive Capability
GaN Transistor Driving Capability (options A and C)
Low Startup Current Consumption
Maximum Operation Frequency up to 1 MHz
Improved Robust Self Synchronization Capability
SOIC-8 and DFN−8 (4x4) and WDFN8 (2x2) Packages
These are Pb−Free Devices
Benefits
Robust design during power excurtion
Provides negligible switching losses and prolongs FET life
Robustness
Improves efficiency and design flexibility
Improves efficiency and design flexibility
Improves efficiency and design flexibility
Advantage with multiple Vout such as smart charging or USB-PD
higher drive strenght provides higher efficiency
GaN FET further improve efficiency and solution size
Improves standby power consumption
Provides higher OFF-ON time accuracy, thus improving efficiency
Applications
Notebook Adapters
LCD TVs
Notebook Adapters
Tablet Adapters
LCD TVs
End Products
High Power Density AC/DC Power Supplies (Cell Phone Chargers)
All SMPS with High Efficiency Requirements
Smartphone Adapters
AC-DC Power Adapters

Specifications

Compliance Pb-free Halide free

Alternative Descriptions

Synchronous Rectifier Controller/Reel |Onsemi NCP4308QDR2G | Newark Electronics
SYNC RECTIFIER CONTROLLER, 35V, SOIC-8 | Farnell


Frequently Asked Questions

Where can I find additional details, specifications and documents for a NCP4308QDR2G?

Additional datasheets, footprints and schematics for NCP4308QDR2G are listed on our Part Details page. You can also find images and similar parts to NCP4308QDR2G on this page.

What pricing and inventory information can I view?

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What category does NCP4308QDR2G fall under?

The NCP4308QDR2G is listed under Power Management > AC-DC Power Conversion > Secondary Side Controllers.

Can I view similar or alternative parts?

You can view similar parts to NCP4308QDR2G when available in the Secondary Side Controllers range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the NCP4308QDR2G you can contact the distributor directly for product support, shipping queries etc.

Is the NCP4308QDR2G RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by ON Semiconductor.

Which authorised distributors for NCP4308QDR2G have stock available?

Authorised distributors including Newark Electronics and Farnell have stock available or on a lead time for NCP4308QDR2G.

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