NCP1200: PWM Controller, Fixed Frequency, Flyback, Current Mode
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Housed in SO-8 or DIP-8 package, the NCP1200 represents a major leap toward ultra-compact Switch-Mode Power Supplies. Thanks to a novel concept, the circuit allows the implementation of a complete offline battery charger or a standby SMPS with few external components. Furthermore, an integrated output short-circuit protection lets the designer build an extremely low-cost AC/DC wall adapter associated with a simplified feedback scheme.
With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz, the controller drives low gate-charge switching devices like an IGBT or a MOSFET thus requiring a very small operating power. Thanks to current-mode control, the NCP1200 drastically simplifies the design of reliable and cheap offline converters with excellent audio- susceptibility and inherent pulse-by-pulse control.
When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency at light loads. Because this occurs at low peak current, no acoustic noise takes place.
Finally, the IC is self-supplied from the DC rail, eliminating the need of an auxiliary winding. This feature ensures operation in presence of low output voltage or shorts.
With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz, the controller drives low gate-charge switching devices like an IGBT or a MOSFET thus requiring a very small operating power. Thanks to current-mode control, the NCP1200 drastically simplifies the design of reliable and cheap offline converters with excellent audio- susceptibility and inherent pulse-by-pulse control.
When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency at light loads. Because this occurs at low peak current, no acoustic noise takes place.
Finally, the IC is self-supplied from the DC rail, eliminating the need of an auxiliary winding. This feature ensures operation in presence of low output voltage or shorts.
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Technical Documentation & Design Resources
Design & Development Tools (1) | Package Drawings (2) |
Application Notes (3) | FAQ (1) |
Data Sheets (1) |
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Case Outline |
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NCP1200D100R2G |
Active, Not Rec ![]() |
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NCP1200 | SOIC-8 | 751-07 | 1 | 260 | Tape and Reel | 2500 | $0.3523 | ||||||||
NCP1200D40R2G |
Active, Not Rec ![]() |
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NCP1200 | SOIC-8 | 751-07 | 1 | 260 | Tape and Reel | 2500 | $0.3523 | ||||||||
NCP1200D60R2G |
Active, Not Rec ![]() |
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NCP1200 | SOIC-8 | 751-07 | 1 | 260 | Tape and Reel | 2500 | $0.3523 | ||||||||
NCP1200P100G |
Active, Not Rec ![]() |
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NCP1200 | PDIP-8 | 626-05 | NA | Tube | 50 | $0.3867 | |||||||||
NCP1200P40G |
Active, Not Rec ![]() |
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NCP1200 | PDIP-8 | 626-05 | NA | Tube | 50 | $0.45 | |||||||||
NCP1200P60G |
Active, Not Rec ![]() |
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NCP1200 | PDIP-8 | 626-05 | NA | Tube | 50 | $0.3867 |
Market Leadtime (weeks) | : | 4 to 8 |
FutureElectronics (2020-08-19 00:00) | : | >1K |
Avnet (2020-08-19 00:00) | : | >1K |
PandS (2020-09-14 00:00) | : | >10K |
Market Leadtime (weeks) | : | 17 to 20 |
FutureElectronics (2020-08-19 00:00) | : | >1K |
Market Leadtime (weeks) | : | Contact Factory |
PandS (2020-09-14 00:00) | : | >10K |
Market Leadtime (weeks) | : | 13 to 16 |
Avnet (2020-08-19 00:00) | : | >1K |
PandS (2020-09-14 00:00) | : | >1K |
Market Leadtime (weeks) | : | 2 to 4 |
ON Semiconductor (2020-09-02 00:00) | : | 8,700 |
Market Leadtime (weeks) | : | 4 to 8 |
ON Semiconductor (2020-09-02 00:00) | : | 334,150 |
PandS (2020-09-14 00:00) | : | >10K |
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