NCP1937: Combination Power Factor Correction & Quasi-Resonant Flyback Controller
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This combination IC integrates power factor correction (PFC) and quasi-resonant flyback functionality necessary to implement a compact and highly efficient Switched Mode Power Supply for an adapter application.
The PFC stage exhibits near-unity power factor while operating in a Critical Conduction Mode (CrM) with a maximum frequency clamp. The circuit incorporates all the features necessary for building a robust and compact PFC stage while minimizing the number of external components.
The quasi-resonant current-mode flyback stage features a proprietary valley-lockout circuitry, ensuring stable valley switching. This system works down to the 4th valley and toggles to a frequency foldback mode with a minimum frequency clamp beyond the 4th valley to eliminate audible noise. Skip mode operation allows excellent efficiency in light load conditions while consuming very low standby power consumption.
The PFC stage exhibits near-unity power factor while operating in a Critical Conduction Mode (CrM) with a maximum frequency clamp. The circuit incorporates all the features necessary for building a robust and compact PFC stage while minimizing the number of external components.
The quasi-resonant current-mode flyback stage features a proprietary valley-lockout circuitry, ensuring stable valley switching. This system works down to the 4th valley and toggles to a frequency foldback mode with a minimum frequency clamp beyond the 4th valley to eliminate audible noise. Skip mode operation allows excellent efficiency in light load conditions while consuming very low standby power consumption.
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Applications | End Products | |
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Technical Documentation & Design Resources
Design & Development Tools (1) | Package Drawings (1) |
Design Notes (1) | Videos (1) |
White Papers (1) | Conformance Reports (2) |
Data Sheets (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 |
Availability & Samples
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Specifications
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Interactive Block Diagram
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Case Outline |
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NCP1937A1DR2G | Lifetime |
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NCP1937 | SOIC-20 NB | 751BS | 1 | 260 | Tape and Reel | 2500 | $0.81
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NCP1937A2DR2G | Active |
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NCP1937 | SOIC-20 NB | 751BS | 1 | 260 | Tape and Reel | 2500 | $0.81
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NCP1937A3DR2G | Active |
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NCP1937 | SOIC-20 NB | 751BS | 1 | 260 | Tape and Reel | 2500 | $0.81
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NCP1937B1DR2G | Active |
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NCP1937 | SOIC-20 NB | 751BS | 1 | 260 | Tape and Reel | 2500 | $0.81
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NCP1937B2DR2G | Lifetime |
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NCP1937 | SOIC-20 NB | 751BS | 1 | 260 | Tape and Reel | 2500 | $0.81 | ||||||||
NCP1937B3DR2G | Active |
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NCP1937 | SOIC-20 NB | 751BS | 1 | 260 | Tape and Reel | 2500 | $0.81
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NCP1937B51DR2G | Active |
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NCP1937 | SOIC-20 NB | 751BS | 1 | 260 | Tape and Reel | 2500 | $0.81
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NCP1937C1DR2G | Lifetime |
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NCP1937 | SOIC-20 NB | 751BS | 1 | 260 | Tape and Reel | 2500 | $0.81 | ||||||||
NCP1937C4DR2G | Active |
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NCP1937 | SOIC-20 NB | 751BS | 1 | 260 | Tape and Reel | 2500 | $0.81
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NCP1937C61DR2G | Active |
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NCP1937 | SOIC-20 NB | 751BS | 1 | 260 | Tape and Reel | 2500 | $0.81
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Market Leadtime (weeks) | : | Contact Factory |
Market Leadtime (weeks) | : | Contact Factory |
Market Leadtime (weeks) | : | Contact Factory |
Market Leadtime (weeks) | : | Contact Factory |
Market Leadtime (weeks) | : | Contact Factory |
ON Semiconductor (2020-09-02 00:00) | : | 2,500 |
Market Leadtime (weeks) | : | Contact Factory |
Market Leadtime (weeks) | : | Contact Factory |
Market Leadtime (weeks) | : | Contact Factory |
Market Leadtime (weeks) | : | Contact Factory |
Market Leadtime (weeks) | : | Contact Factory |
Product
Description
Pricing ($/Unit)
Compliance
Status
PFC Mode
Frequency Operation
Control Mode
Topology
fSW Typ (kHz)
VCC Max (V)
Drive Cap. (mA)
UVLO (V)
Latch
UVP
Inhibition
Package Type
NCP1937A2DR2G
$0.81
Pb
A
H
P
Active
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
Yes
Yes
Yes
SOIC-20 NB
NCP1937A3DR2G
$0.81
Pb
A
H
P
Active
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
Yes
Yes
Yes
SOIC-20 NB
NCP1937B1DR2G
$0.81
Pb
A
H
P
Active
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
No
Yes
Yes
SOIC-20 NB
NCP1937B3DR2G
$0.81
Pb
A
H
P
Active
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
No
Yes
Yes
SOIC-20 NB
NCP1937C4DR2G
$0.81
Pb
A
H
P
Active
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
Yes
Yes
Yes
SOIC-20 NB
NCP1937C61DR2G
$0.81
Pb
A
H
P
Active
CRM
Variable
Current Mode
Flyback
Variable
30
0.5
Yes
Yes
Yes
Yes
SOIC-20 NB
Case Outlines
751BS
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