NCP4305DDR2G AC-DC Power Conversion by ON Semiconductor

Secondary Side Synchronous Rectification Driver for High Efficiency SMPS Topologies

Status: Active
Series: NCP4305
RoHS: Compliant
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The NCP4305 is high performance driver tailored to control a synchronous rectification MOSFET in switch mode power supplies. Thanks to its high performance drivers and versatility, it can be used in various topologies such as DCM or CCM flyback, quasi resonant flyback, forward, and half bridge resonant LLC. The combination of externally adjustable minimum off-time and on-time blanking periods helps to fight the ringing induced by the PCB layout and other parasitic elements. A reliable and noise less operation of the SR system is insured due to the Self Synchronization feature. The NCP4305 also utilizes Kelvin connection of the driver to the MOSFET to achieve high efficiency operation at full load and utilizes a light load detection architecture to achieve high efficiency at light 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 and enables maximum SMPS efficiency. The high accuracy driver and 5 V gate clamp enables the use of GaN MOSFETs.

Where to Buy

Prices starting from US$0.49

Distributor Stock
Logo for RS
RS
from US$0.60
No stock
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Newark Electronics
from US$0.49
1,312
in stock
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element14
from US$0.55
1,312
in stock
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Farnell
from US$0.54
1,312
in stock
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Future Electronics
from US$0.59
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Avnet America
from US$0.56
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Avnet Asia
from US$0.54
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EBV Elektronik
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Avnet Silica
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Features

Precise True Secondary Zero Current Detection with Adjustable Threshold
Typically 20 ns Turn off Delay from Current Sense Input to Driver
Zero Current Detection Pin Capability up to 200 V
Optional Ultrafast (7ns) Trigger Input
Disable Input
Adjustable Minimum ON Time and Minimum OFF Time
Self Synchronization
8 A Sink, 4 A Source Drive capability
Light Load Detection with Modulated Gate Drive
4.5 V & 9 V UVLO Options and 36 V(Max)
Benefits
Allows for proper timing of SR MOSFET turn on and turn off
Maximizes conduction time of the MOSFET to increase efficiency
Allows direct connection of CS input to MOSFET drain in flyback applications
Improves performance for applications working in deep CCM
Enters the IC into a low consumption standby mode
Prevents accidental MOSFET turn on or turn off due to ringing
Ensures proper DRV pulses during operation
Fast turn off of MOSFET for optimized conduction period
Increased stability coming in and out of Light Load
Wide output operating voltages
Applications
High Power Density AC/DC Power Supplies
Server Power Supplies
High Density USB Adapters
End Products
Notebook Adapters
ATX & All-in-one Power Supplies

Specifications

Description NCP4305
Compliance Pb-free Halide free
VCC Max (V) 37
Vref Typ (V) N/A
ICC Max (A) 0.006
TA Min (°C) -40
TA Max (°C) 125
Package Type SOIC-8

Alternative Descriptions

Sync Rectification Driver, Soic-8 | Newark Electronics
SYNC RECTIFICATION DRIVER, SOIC-8 | element14
Secondary Side Controller SyncRect. SOIC | RS
Secondary Side Synchronous Rectification Driver | Future Electronics
SECONDARY SIDE SYNCHRON | Avnet America


Frequently Asked Questions

Where can I find additional details, specifications and documents for a NCP4305DDR2G?

Additional datasheets, footprints and schematics for NCP4305DDR2G are listed on our Part Details page. You can also find images and similar parts to NCP4305DDR2G on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for NCP4305DDR2G on our Product Comparison page. Access via the 'View Pricing & Stock' button to view NCP4305DDR2G price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does NCP4305DDR2G fall under?

The NCP4305DDR2G 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 NCP4305DDR2G 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 NCP4305DDR2G you can contact the distributor directly for product support, shipping queries etc.

Is the NCP4305DDR2G RoHS compliant?

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

Which authorised distributors for NCP4305DDR2G have stock available?

Authorised distributors including Newark Electronics, element14, Farnell, RS and Future Electronics have stock available or on a lead time for NCP4305DDR2G.

How do I check stock and lead times for all distributors?

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