NCP4355: Secondary Side Controller, SMPS Off Mode, for Low Standby Power Adapters
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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.
Technical Documentation & Design Resources
| Data Sheets (1) | Videos (1) |
| Package Drawings (1) | Evaluation Board Documents (4) |
Evaluation/Development Tool Information
| Product | Status | Compliance | Short Description | Action | |
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| NCP1937BADAPGEVB | Active |
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90 W Adapter PFC+QR 10 MW Evaluation Board |
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Availability & Samples
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Specifications
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Interactive Block Diagram
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Case Outline |
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| NCP4355ADR2G | Obsolete |
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NCP4355, with Constant Current Current Loop and LED driver | SOIC-8 | 751-07 | 1 | 260 | Tape and Reel | 2500 | |||||||||
| NCP4355BDR2G | Obsolete |
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NCP4355 | SOIC-8 | 751-07 | 1 | 260 | Tape and Reel | 2500 | |||||||||
| NCP4355CDR2G | Active |
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NCP4355, with Constant Current Current Loop | SOIC-8 | 751-07 | 1 | 260 | Tape and Reel | 2500 | $0.28
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| Market Leadtime (weeks) | : | Contact Factory |
| Market Leadtime (weeks) | : | Contact Factory |
| Market Leadtime (weeks) | : | Contact Factory |
Product
Description
Pricing ($/Unit)
Compliance
Status
VCC Max (V)
Vref Typ (V)
ICC Max (A)
TA Min (°C)
TA Max (°C)
Package Type
NCP4355CDR2G
$0.28
Pb
A
H
P
Active
36
1.25
0.000135
-40
125
SOIC-8
Case Outlines
751-07
Application
Diagram - Block
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