NCP1205D ,Single Ended PWM Controller Featuring QR Operation and Soft Frequency FoldbackFeaturesWW = Work Week• Natural Drain Valley Switching for Lower EMI and Quasi–ResonantOperation (Q ..
NCP1205DR2 , Single Ended PWM Controller Featuring QR Operation and Soft Frequency Foldback
NCP1205P ,Single Ended PWM Controllerfeatures emphasize: Large Supply Range: Battery charger applications Full Quasi–Resonant Operatio ..
NCP1207ADR2G ,PWM Current-Mode Controller for Free Running Quasi-Resonant OperationFeaturesPIN CONNECTIONS• Free−Running Borderline/Critical Mode Quasi−Resonant Operation• Current−Mo ..
NCP1207APG , PWM Current−Mode Controller for Free Running Quasi−Resonant Operation
NCP1207B ,PWM Controller, Free Running Quasi-Resonant Current Mode(Quasi--Resonant operation). Due to its inherent skip cycle capability,the controller enters burst ..
NJM2596 , 5-INPUT 3-OUTPUT VIDEO SWITCH FOR S2
NJM2624AD , BRUSH LESS DC MOTOR PRE-DRIVER
NJM2625D , PWM TYPE 3-PHASE DC BRUSHLESS MOTOR CONTOROL IC
NJM2625M , PWM TYPE 3-PHASE DC BRUSHLESS MOTOR CONTOROL IC
NJM2670E3 , DUAL H BRIDGE DRIVER
NJM2700G , SRS WOW AUDIO PROCESSOR
NCP1205D
Single Ended PWM Controller Featuring QR Operation and Soft Frequency Foldback
NCP1205
Single Ended PWM
Controller Featuring QR
Operation and Soft
Frequency Foldback
The NCP1205 combines a true Current Mode Control modulator
and a demagnetization detector to ensure full Discontinuous
Conduction Mode in any load/line conditions and minimum drain
voltage switching (Quasi–Resonant operation, also called critical
conduction operation). With its inherent Variable Frequency Mode
(VFM), the controller decreases its operating frequency at constant
peak current whenever the output power demand diminishes.
Associated with automatic multiple valley switching, this unique
architecture guarantees minimum switching losses and the lowest
power drawn from the mains when operating at no–load conditions.
Thus, the NCP1205 is optimal for applications targeting the newest
International Energy Agency (IEA) recommendations for standby
power.
The internal High–Voltage current source provides a reliable
charging path for the VCC capacitor and ensures a clean and short
start–up sequence without deteriorating the efficiency once off.
The continuous feedback signal monitoring implemented with an
Over–Current fault Protection circuitry (OCP) makes the final design
rugged and reliable. An internal Over V oltage Protection (OVP) circuit
continuously monitors the VCC pin and stops the IC whenever its level
exceeds 36 V . The DIP14 offers an adjustable version of the OVP
threshold via an external resistive network.
Features Natural Drain Valley Switching for Lower EMI and Quasi–Resonant
Operation (QR) Smooth Frequency Foldback for Low Standby and Minimum Ripple
at Light–Load Adjustable Maximum Switching Frequency Internal 200 ns Leading Edge Blanking on Current Sense 250 mA Sink and Source Driver Wide Operating Voltages: 8.0 to 36 V Wide UVLO Levels: 7.2 to 15 V Typical Auto–Recovery Internal Short–Circuit Protection (OCP) Integrated 3.0 mA Typ. Start–Up Source Current Mode Control Adjustable Over–V oltage Level Available in DIP8 and DIP14 Package
Applications High Power AC/DC Adapters for Notebooks, etc. Offline Battery Chargers Power Supplies for DVD, CD Players, TVs, Set–Top Boxes, etc. Auxiliary Power Supplies (USB, Appliances, etc.)
