NCP4354: Secondary Side Sleep mode Controller for Low Standby Power Adapters

The NCP4353 and NCP4354 are secondary side SMPS controllers designed for use in applications which require extremely low no load power consumption. The device is capable of detecting 'no load' conditions and entering the power supply into a low consumption OFF mode. During OFF mode, the primary side controller is turned off and energy is provided by the output capacitors thus eliminating the power consumption required to maintain regulation. During OFF mode, the output voltage relaxes and is allowed to decrease to an adjustable level. Once more energy is required, the NCP4353 or NCP4354 automatically restarts the primary side controller. During normal power supply operation, the devices provide integrated voltage feedback regulation, replacing the need for a shunt regulator. The A versions include a current regulation loop in addition to voltage regulation. Feedback control as well as ONOFF signal can be provided with only one optocoupler. The NCP4354 includes a LED driver pin implemented with an open drain MOSFET driven by a 1 kHz square wave with a 12.5% duty cycle for indication purpose. The NCP4354 is available in SOIC-8 package and the NCP4353 is available in TSOP-6.

Features

Supply Current <100 uA
Constant current and constant voltage regulation (A version)
+-1% reference voltage accuracy over temperature

Benefits

Low power consumption in all operating modes
Optional current regulation
Accurate regulation

Data Sheets (1)

Document Title	Document ID/Size	Revision	Revision Date
Secondary Side SMPS OFF Mode Controller for Low Standby Power	NCP4353/D (268kB)	4

Package Drawings (1)

Document Title	Document ID/Size	Revision
SOIC-8 Narrow Body	751-07 (62.6kB)	AK

Evaluation Board Documents (15)

Document Title	Document ID/Size	Revision	Revision Date
65 W Off-Line Adapter Featuring Very Low No-Load Power Consumption Evaluation Board User's Manual	EVBUM2138/D (746.0kB)	0
Implementation High Power Notebook Adapter Evaluation Board User's Manual	EVBUM2341/D (1442kB)	1	Feb, 2016
NCP1399ADPGEVB Bill Of Materials (ROHS Compliant)	NCP1399ADPGEVB_BOM_ROHS.pdf (117kB)	0
NCP1399ADPGEVB Gerber Layout Files (Zip Format)	NCP1399ADPGEVB_GERBER.rev0.zip (85kB)	0
NCP1399ADPGEVB Schematic	NCP1399ADPGEVB_SCHEMATIC.pdf (123kB)	0
NCP1399ADPGEVB Test Procedure	NCP1399ADPGEVB_TEST_PROCEDURE.pdf (94kB)	1
NCP4305FBDAP Evaluation Board User's Manual	EVBUM2340/D (1678kB)	0	Dec, 2015
NCP4305FBDAPGEVB Bill of Materials ROHS Compliant	NCP4305FBDAPGEVB_BOM_ROHS.pdf (218kB)	0
NCP4305FBDAPGEVB Gerber Layout Files (Zip Format)	NCP4305FBDAPGEVB_GERBER.zip (97kB)	0
NCP4305FBDAPGEVB Schematic	NCP4305FBDAPGEVB_SCHEMATIC.pdf (132kB)	0
NCP4305FBDAPGEVB Test Procedure	NCP4305FBDAPGEVB_TEST_PROCEDURE.pdf (351kB)	0
NCP4354AADAPGEVB Bill of Materials ROHS Compliant	NCP4354AADAPGEVB_BOM_ROHS.PDF (279.0kB)	0
NCP4354AADAPGEVB Gerber Layout Files (Zip Format)	NCP4354AADAPGEVB_GERBER.ZIP (2900kB)	1
NCP4354AADAPGEVB Schematic	NCP4354AADAPGEVB_SCHEMATIC.PDF (94.0kB)	0
NCP4354AADAPGEVB Test Procedure	NCP4354AADAPGEVB_TEST_PROCEDURE.PDF (83.0kB)	0

Evaluation/Development Tool Information

Product	Status	Compliance	Short Description
NCP1399ADPGEVB	Active	Pb-free	150W Adapter Power Supply Evaluation Board
NCP4305FBDAPGEVB	Active	Pb-free	65W Off-Line Adapter with Synchronous Rectification and Featuring Very Low No-Load Power Consumption Evaluation Board
NCP4354AADAPGEVB	Active	Pb-free	65 W Adapter Off-Mode Controller Demonstration Evaluation Board