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NCP4304: Secondary Side Controller, Synchronous Rectification, for High Efficiency SMPS Topologies

Datasheet: Secondary Side Synchronous Rectification Driver for High Efficiency SMPS Topologies
Rev. 6 (478kB)
Product Overview
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The NCP4304A/B is a full featured controller and driver tailored to control synchronous rectification circuitry in switch mode power supplies. Due to its versatility, it can be used in various topologies such as flyback, forward and Half Bridge Resonant LLC. The combination of externally adjustable minimum on and off times helps to fight the ringing induced by the PCB layout and other parasitic elements. Therefore, a reliable and noise less operation of the SR system is insured. The extremely low turn off delay time, high sink current capability of the driver and automatic package parasitic inductance compensation system allow to maximize synchronous rectification MOSFET conduction time that enables further increase of SMPS efficiency. Finally, a wide operating VCC range combined with two versions of driver voltage clamp eases implementation of the SR system in 24 V output applications.
Features   Benefits
     
  • Precise True Secondary Zero Current Detection with Adjustable Threshold
 
  • Allows for proper timing of SR MOSFET turn on and turn off
  • Automatic Parasitic Inductance Compensation
 
  • Compensates for the parasitic inducatance effects of TO-220 MOSFETS to optimize conduction time
  • Typically 40 ns Turn off Delay from Current Sense Input to Driver
 
  • Maximizes conduction time of the MOSFET to increase efficiency
  • Zero Current Detection Pin Capability up to 200 V
 
  • Allows direct connection of CS input to MOSFET drain in flyback applications
  • Optional Ultrafast Trigger Input
 
  • Improves performance for applications working in deep CCM
  • Disable Input
 
  • Enters the IC into a low consumption standby mode
  • Adjustable Minimum ON Time and Minimum OFF Time
 
  • Prevents accidental MOSFET turn on or turn off due to ringing
  • 5 A/2.5 A Peak Current Sink/Source Drive Capability
 
  • Fast turn off of MOSFET for optimized conduction period
  • Operating Voltage Range up to 30V
 
  • Allows for direct supply from the power supply output voltage in a wide range of applications
Applications   End Products
  • High Power Density AC/DC Power Supplies
 
  • Notebook Adapters
  • Server Power Supplies
  • ATX Power Supplies
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCP1397GANGEVB Consult Sales Office
Pb-free
High Performance Integrated High Voltage Driver Evaluation Board
NCP1937BADAPGEVB Active
Pb-free
90 W Adapter PFC+QR 10 MW Evaluation Board
Availability & Samples
Specifications
Case Outlines
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP4304ADR2G Active
Pb-free
Halide free
NCP4304 SOIC-8 751-07 1 260 Tape and Reel 2500 $0.44
NCP4304AMNTWG Active
Pb-free
Halide free
NCP4304 DFN-8 488AF 1 260 Tape and Reel 4000 $0.741
NCP4304BDR2G Active
Pb-free
Halide free
NCP4304 SOIC-8 751-07 1 260 Tape and Reel 2500 $0.44
NCP4304BMNTWG Active
Pb-free
Halide free
NCP4304 DFN-8 488AF 1 260 Tape and Reel 4000 $0.5683
Market Leadtime (weeks) : 8 to 12
FutureElectronics   (2020-08-19 00:00) : >1K
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 24,000
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 5,000
Avnet   (2020-08-19 00:00) : >1K
Market Leadtime (weeks) : 17 to 20

Product
Description
Pricing ($/Unit)
Compliance
Status
VCC Max (V)
Vref Typ (V)
ICC Max (A)
TA Min (°C)
TA Max (°C)
Package Type
NCP4304ADR2G  
 $0.44 
Pb
H
 Active   
30
N/A
0.0066
-40
125
SOIC-8
NCP4304AMNTWG  
 $0.741 
Pb
H
 Active   
30
N/A
0.0066
-40
125
DFN-8
NCP4304BDR2G  
 $0.44 
Pb
H
 Active   
30
N/A
0.0062
-40
125
SOIC-8
NCP4304BMNTWG  
 $0.5683 
Pb
H
 Active   
30
N/A
0.0062
-40
125
DFN-8
Case Outlines
751-07    488AF   
Packages
NCP4304: Secondary Side Controller, Synchronous Rectification, for High Efficiency SMPS Topologies
NCP4304: Secondary Side Controller, Synchronous Rectification, for High Efficiency SMPS Topologies
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