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Overview
| Topology | Flyback Converter |
| Switching frequency | 300 kHz |
| IC revision | 1 |
Description
The NCL30000 is a switch mode power supply controller intended for low to medium power single stage power factor (PF) corrected LED Drivers. The device is designed to operate in critical conduction mode (CrM) and is suitable for flyback as well as buck topologies.Constant on time CrM operation is particularly suited for isolated flyback LED applications as the control scheme is straightforward and very high efficiency can be achieved even at low power levels. These are important in LED lighting to comply with regulatory requirements and meet overall system luminous efficacy requirements. In CrM, the switching frequency will vary with line and load and switching losses are low as recovery losses in the output rectifier are negligible since the current goes to zero prior to reactivating the main MOSFET switch.The device features a programmable on time limiter, zero current detect sense block, gate driver, trans-conductance error amplifier as well as all PWM control circuitry and protection functions required to implement a CrM switch mode power supply. Moreover, for high efficiency, the device features low startup current enabling fast, low loss charging of the VCC capacitor. The current sense protection threshold has been set at 500 mV to minimize power dissipation in the external sense resistor. To support the environmental operation range of Solid State Lighting, the device is specified across a wide junction temperature range of −40C to 125C.
Features
- Very Low 24 A Typical Startup Current
- Constant On Time PWM Control
- Cycle-by-Cycle Current Protection
- Low Current Sense Threshold of 500 mV
- Low 2 mA Typical Operating Current
- Source 500 mA/Sink 800 mA Totem Pole Gate Driver
- Reference Design for TRIAC and Trailing Edge Line Dimmers
- Wide Operating Temperature Range
- No Input Voltage Sensing Requirement
- Enable Function and Overvoltage Protection
- These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS-Compliant
Typical applications
- TRIAC Dimmable LED Based PAR Lamps
- LED Based Down Lights
- Commercial and Residential LED Fixtures
- Power Factor Corrected Constant Voltage Supplies
- LED Driver Power Supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | ISAT,10%(A) | fres(MHz) | Version | IR(A) | L(µH) | RDC max.(Ω) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | IR(A) | L1(µH) | RDC max.(mΩ) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI Radial Leaded Wire Wound Inductor, 0.51 A, 3.3 MHz | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | Saturation Current @ 10%0.51 A | Self Resonant Frequency3.3 MHz | VersionHeat Shrinking Tube | Rated Current0.33 A | Inductance680 µH | DC Resistance4 Ω | – | – | – | Length8.5 mm | Width8.5 mm | Height5.5 mm | MountTHT | – | – | – | ||||
 | WE-CMB NiZn Common Mode Power Line Choke, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMB NiZn Common Mode Power Line Choke | – | – | VersionTHT | Rated Current3 A | Inductance30 µH | DC Resistance0.026 Ω | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (AC) | MaterialNiZn | Length16 mm | Width7.5 mm | Height17.5 mm | MountTHT | Rated Current3 A | Inductance [1]30 µH | DC Resistance [1]26 mΩ | ||||
 | WE-LF Common Mode Power Line Choke, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LF Common Mode Power Line Choke | – | – | VersionTHT | Rated Current0.4 A | Inductance27000 µH | DC Resistance1.2 Ω | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (AC) | MaterialMnZn | Length18 mm | Width18 mm | Height13 mm | MountTHT | Rated Current0.4 A | Inductance [1]27000 µH | DC Resistance [1]1200 mΩ | ||||
750312594 | Power Inductor, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Power Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |