Product Overview

Product Overview
NCP4354: Secondary Side Sleep mode Controller for Low Standby Power
Adapters
For complete documentation, see the data sheet
Product Description
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
Benefits
• Supply Current <100 uA
• Constant current and constant voltage regulation (A version)
• +-1% reference voltage accuracy over temperature
• Low power consumption in all operating modes
• Optional current regulation
• Accurate regulation
Part Electrical Specifications
Product
Compliance
Status
VCC Max (V)
Vref Typ (V)
ICC Max (A)
TA Min (°C)
TA Max (°C)
Package Type
NCP4354ADR2G
Pb-free
Active
36
1.25
0.00015
0
125
SOIC-8
Active
36
1.25
0.00015
0
125
SOIC-8
Halide free
NCP4354BDR2G
Pb-free
Halide free
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016