NCP1360,NCP1365 Low Power Offline ConstantCurrent & Constant VoltagePrimary Side PWMCurrent-Mode Controllerwith/without High VoltageStartup Current Source
●The NCP1360/65 offers a new solution targeting output power levels from a few watts up to 20 W in a universal−mains flyback application. Thanks to a novel method this new controller saves the secondary feedback circuitry (opto−coupler and TL431 reference)while achieving excellent line and load regulation.
The NCP1360/65 operates in valley−lockout quasi−resonant peak current mode control mode at nominal load to provide high efficiency.When the secondary−side power starts diminishing, the switching frequency naturally increases until a voltage−controlled oscillator(VCO) takes the lead, synchronizing the MOSFET turn−on in a drain−source voltage valley. The frequency is thus reduced by stepping into successive valleys until the number 4 is reached. Beyond this point, the frequency is linearly decreased in valley−switching mode until a minimum is hit. This technique keeps the output in regulation with the tiniest dummy load. Valley lockout during the first four drain−source valleys prevents erratic discrete jumps and provides good efficiency in lighter load situations.
●Features
■Primary−Side Feedback Eliminates Opto−coupler and TL431Reference
■±5% Voltage Regulation•±10% Current Regulation
■560 V Startup Current Source
■No Frequency Clamp, 80 or 110 kHz MaximumSwitching Frequency Options
■Quasi−Resonant Operation with Valley SwitchingOperation
■Fixed Peak Current & Deep Frequency Foldback @Light Load Operation
■External Constant Voltage Feedback Adjustment
■Cycle by Cycle Peak Current Limit•Build−In Soft−Start
■Over & Under Output Voltage Protection
■Cable Drop Compensation (None, 150 mV, 300 mV or450 mV option)
■Wide Operation V-CCRange (up to 28 V)
■Low Start−up Current (2.5 μA typ.) with NCP1360
■Clamped Gate−drive Output for MOSFET
■CS & Vs/ZCD pin Short and Open Protection•Internal Temperature Shutdown
■Less than 10 mW No−Load Performance at High Line with NCP1365 Version
■Less than 30 mW No−Load Performance at High Linewith NCP1360 Version
■These are Pb−Free Devices
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NCP1360 、 NCP1365 、 NCP1365AABCYDR2G 、 NCP1365ACBAXDR2G 、 NCP1365BABCYDR2G 、 NCP1365BAAAYDR2G 、 NCP1360AABCYSNT1G 、 NCP1360BABCYSNT1G 、 NCP1360BBCCYSNT1G 、 NCP1360BCCCYSNT1G 、 NCP1360BACCYSNT1G |
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Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller |
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[ Low power ac−dc Adapters for Chargers ][ Ac−dc USB chargers for Cell Phones, Tablets and Cameras ] |
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Datasheet |
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Please see the document for details |
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SOIC−7;TSOP−6 |
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English Chinese Chinese and English Japanese |
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June, 2018 |
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Rev. 7 |
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NCP1360/D |
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1 MB |
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