Product Overview

Product Overview
NCP4355: Secondary Side Controller, SMPS Off Mode, for Low Standby
Power Adapters
For complete documentation, see the data sheet
Product Description
The NCP4355 is a secondary side SMPS controller 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 NCP4355 automatically restarts the primary side controller by ONOFF current
that flows through ONOFF optocoupler. The NCP4355 controls the primary controller with an Active ON signal, meaning that it only
drives optocoupler current during ON mode to minimize consumption during OFF mode.
Part Electrical Specifications
Product
Compliance
Status
VCC Max (V)
Vref Typ (V)
ICC Max (A)
TA Min (°C)
TA Max (°C)
Package Type
NCP4355ADR2G
Pb-free
Active
36
1.25
0.000135
-40
125
SOIC-8
Active
36
1.25
0.000135
-40
125
SOIC-8
Active
36
1.25
0.000135
-40
125
SOIC-8
Halide free
NCP4355BDR2G
Pb-free
Halide free
NCP4355CDR2G
Pb-free
Halide free
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016