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NCP4353: Secondary Side Sleep Mode Controller for Low Standby Power Adapters

Datasheet: Secondary Side SMPS OFF Mode Controller for Low Standby Power
Rev. 4 (268kB)
Product Overview
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» Product Change Notification
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
 
  • Low power consumption in all operating modes
  • Constant current and constant voltage regulation (A version)
 
  • Optional current regulation
  • +-1% reference voltage accuracy over temperature
 
  • Accurate regulation
Technical Documentation & Design Resources
Data Sheets (1) Package Drawings (1)
Availability & Samples
Specifications
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP4353ASNT1G Active
Pb-free
Halide free
NCP4353, Current regulation TSOP-6 318G-02 1 260 Tape and Reel 3000 $0.2787
NCP4353BSNT1G Active
Pb-free
Halide free
NCP4353, Adjustable Vmin TSOP-6 318G-02 1 260 Tape and Reel 3000 $0.2787
Market Leadtime (weeks) : 4 to 8
Market Leadtime (weeks) : 4 to 8

Product
Description
Pricing ($/Unit)
Compliance
Status
VCC Max (V)
Vref Typ (V)
ICC Max (A)
TA Min (°C)
TA Max (°C)
Package Type
NCP4353ASNT1G  
 $0.2787 
Pb
H
 Active   
36
1.25
0.00015
0
125
TSOP-6
NCP4353BSNT1G  
 $0.2787 
Pb
H
 Active   
36
1.25
0.00015
0
125
TSOP-6
Case Outlines
318G-02   
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