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

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.

特性

Precise True Secondary Zero Current Detection with Adjustable Threshold
Automatic Parasitic Inductance Compensation
Typically 40 ns Turn off Delay from Current Sense Input to Driver
Zero Current Detection Pin Capability up to 200 V
Optional Ultrafast Trigger Input
Disable Input
Adjustable Minimum ON Time and Minimum OFF Time
5 A/2.5 A Peak Current Sink/Source Drive Capability
Operating Voltage Range up to 30V

优势

Allows for proper timing of SR MOSFET turn on and turn off
Compensates for the parasitic inducatance effects of TO-220 MOSFETS to optimize conduction time
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
Fast turn off of MOSFET for optimized conduction period
Allows for direct supply from the power supply output voltage in a wide range of applications

应用

High Power Density AC/DC Power Supplies

终端产品

Notebook Adapters
Server Power Supplies
ATX Power Supplies

封装

数据表 (1)

Document Title	Document ID/Size	Revision	Revision Date
Secondary Side Synchronous Rectification Driver for High Efficiency SMPS Topologies	NCP4304/D (478kB)	6	Mar, 2016

评估板文档 (8)

Document Title	Document ID/Size	Revision
NCP1397GANGEVB Bill of Materials ROHS Compliant	NCP1397GANGEVB_BOM_ROHS.pdf (163kB)	2
NCP1397GANGEVB Gerber Layout Files (Zip Format)	NCP1397GANGEVB_GERBER.zip (102kB)	0
NCP1397GANGEVB Schematic	NCP1397GANGEVB_SCHEMATIC.pdf (255kB)	0
NCP1397GANGEVB Test Procedure	NCP1397GANGEVB_TEST_PROCEDURE.pdf (111kB)	0
NCP1937BADAPGEVB Bill of Materials ROHS Compliant	NCP1937BADAPGEVB_BOM_ROHS.PDF (290kB)	2
NCP1937BADAPGEVB Gerber Layout Files (Zip Format)	NCP1937BADAPGEVB_GERBERS.ZIP (135kB)	2
NCP1937BADAPGEVB Schematic	NCP1937BADAPGEVB_SCHEMATIC.PDF (366kB)	2
NCP1937BADAPGEVB Test Procedure	NCP1937BADAPGEVB_TEST_PROCEDURE.PDF (156.0kB)	0

封装图纸 (2)

Document Title	Document ID/Size	Revision
8 PIN DFN, 4x4	488AF (61.3kB)	C
SOIC-8 Narrow Body	751-07 (62.6kB)	AK

评估板与开发工具

产品	状况	Compliance	简短说明
NCP1397GANGEVB	Active	Pb-free	High Performance Integrated High Voltage Driver Evaluation Board
NCP1937BADAPGEVB	Active	Pb-free	90 W Adapter PFC+QR 10 MW Evaluation Board

产品订购型号

产品	状况	Compliance	封装		MSL*	容器		预算价格 (1千个数量的单价）
NCP4304ADR2G	Active	Pb-free Halide free	SOIC-8	751-07	1	Tape and Reel	2500	$0.42
NCP4304AMNTWG	Active	Pb-free Halide free	DFN-8	488AF	1	Tape and Reel	4000	$0.64
NCP4304BDR2G	Active	Pb-free Halide free	SOIC-8	751-07	1	Tape and Reel	2500	$0.42
NCP4304BMNTWG	Active	Pb-free Halide free	DFN-8	488AF	1	Tape and Reel	4000	$0.64