NCP1341: Quasi-Resonant Controller, High-Voltage, Featuring Valley Lock-Out Switching with Power Excursion Mode (PEM)
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The NCP1341 is a highly integrated quasi−resonant flyback controller suitable for designing high−performance off−line power converters. With an integrated active X2 capacitor discharge feature, the NCP1341 can enable no−load power consumption below 30 mW.
The quasi−resonant current−mode flyback stage features a proprietary valley−lockout circuitry, ensuring stable valley switching. This system works down to the 6th valley and transitions to a frequency foldback mode to reduce switching losses. As the load decreases further, the NCP1341 enters quiet−skip mode to manage the power delivery.
The NCP1341 integrates power excursion mode (PEM) to minimize transformer size in designs requiring high transient load capability. If transient load capability is not desired, the NCP1340 offers the same performance and features without PEM.
To help ensure converter ruggedness, the NCP1341 implements several key protective features such as internal brownout detection, a non−dissipative Over Power Protection (OPP) for constant maximum output power regardless of input voltage, a latched over voltage and NTC−ready over-temperature protection through a dedicated pin, and line removal detection to safely discharge the X2 capacitors when the line is removed.
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Technical Documentation & Design Resources
Design Notes (1) | Videos (1) |
Data Sheets (1) | Conformance Reports (1) |
Package Drawings (2) | Evaluation Board Documents (4) |
Evaluation/Development Tool Information
Product | Status | Compliance | Short Description | Action | |
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NCP1341GEVB | Active |
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High-Voltage, Quasi-Resonant Controller Featuring Valley Lock-Out Switching Evaluation Board. |
Availability & Samples
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Specifications
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Case Outline |
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NCP1341A1D1R2G | Active |
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NCP1341 | SOIC-9 NB | 751BP | 1 | 260 | Tape and Reel | 2500 | $0.4133
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NCP1341B1D1R2G | Active |
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NCP1341 | SOIC-9 NB | 751BP | 1 | 260 | Tape and Reel | 2500 | $0.4133 | ||||||||
NCP1341B1DR2G | Active |
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NCP1341 | SOIC-8 | 751-07 | 1 | 260 | Tape and Reel | 2500 | $0.4 | ||||||||
NCP1341B4D1R2G | Active |
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NCP1341 | SOIC-9 NB | 751BP | 1 | 260 | Tape and Reel | 2500 | $0.4133
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NCP1341B5D1R2G |
Active ![]() |
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NCP1341 | SOIC-9 NB | 751BP | 1 | 260 | Tape and Reel | 2500 | $0.4133
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Market Leadtime (weeks) | : | 4 to 8 |
Market Leadtime (weeks) | : | 4 to 8 |
ON Semiconductor (2020-09-02 00:00) | : | 37,500 |
Market Leadtime (weeks) | : | 4 to 8 |
ON Semiconductor (2020-09-02 00:00) | : | 32,500 |
Market Leadtime (weeks) | : | 13 to 16 |
Market Leadtime (weeks) | : | 4 to 8 |
Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Control Mode
fsw Typ (kHz)
Stand-by Mode
UVLO (V)
Short Circuit Protection
Latch
Soft Start
VCC Max (V)
Drive Cap. (mA)
Package Type
NCP1341A1D1R2G
$0.4133
Pb
A
H
P
Active
Flyback
Current Mode
Variable
Yes
9
Yes
Yes
Yes
30
500 / 800
SOIC-9 NB
NCP1341B1D1R2G
$0.4133
Pb
A
H
P
Active
Flyback
Current Mode
Variable
Yes
9
Yes
No
Yes
30
500 / 800
SOIC-9 NB
NCP1341B1DR2G
$0.4
Pb
A
H
P
Active
Flyback
Current Mode
Variable
Yes
9
Yes
No
Yes
30
500 / 800
SOIC-8
NCP1341B4D1R2G
$0.4133
Pb
A
H
P
Active
Flyback
Current Mode
Variable
Yes
9
Yes
No
Yes
30
500 / 800
SOIC-9 NB
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