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Overview
| Topology | Buck Converter |
| Switching frequency | 1000 kHz |
Description
The CAV4201 is a high efficiency step−down converter optimized to drive high current LEDs. A patented switching control algorithm allows highly efficient and accurate LED current regulation. A single RSET resistor sets the full scale LED string current up to 350 mA from supplies as high as 36 V. The switching architecture of the CAV4201 results in extremely low internal power dissipation allowing the device to be housed in a tiny package without the need for dedicated heat sinking. The device is compatible with switching frequencies of up to 1 MHz, making it ideal for applications requiring small footprint and low value external inductors. Enable, analog dimming and LED shutdown control is provided via a single input pin, CTRL. Additional features include overload current protection and thermal shutdown. The device is available in the low profile 5−lead thin SOT23 package and is ideal for space constrained applications.
Features
- LED Drive Current up to 350 mA
- Compatible with 12 V and 24 V Standard Systems
- Handles Transients up to 40 V
- Single Pin Control and Dimming Function
- Power Efficiency up to 94%
- Drives LED Strings of up to 32 V
- Open and Short LED Protection
- Parallel Configuration for Higher Output Current
- CAV Prefix for Automotive and Other Applications requiring Site and Change Control
- TSOT−23 5−lead Package
- These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant
Typical applications
- 12 V and 24 V Lighting Systems, Automotive and Aircraft Lighting, General Lighting, High Brightness 350 mA LEDs
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins | PCB/Cable/Panel | Modularity | Wire Section | λDom typ.(nm) | Emitting Color | λPeak typ.(nm) | λPeak B typ.(nm) | λPeak G typ.(nm) | λPeak R typ.(nm) | λDom B typ.(nm) | λDom G typ.(nm) | λDom R typ.(nm) | ΦV typ.(lm) | IV typ.(mcd) | IV B typ.(mcd) | IV G typ.(mcd) | IV R typ.(mcd) | VF typ.(V) | VF B typ.(V) | VF G typ.(V) | VF R typ.(V) | Chip Technology | 2θ50% typ.(°) | CRI typ. | Size | L(µH) | ISAT(A) | RDC(mΩ) | fres(MHz) | Center pin Ø (Value)(mm) | Plug OD(mm) | Working Voltage(V (AC)) | Packaging | Interface Type | Variant | Gender | Mount | L(mm) | Operating Temperature | H(mm) | Operation Force(g) | Electrical Life(Cycles) | Actuator Color | Washable | Vaporphase process | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR(A) | Z @ 1 GHz(Ω) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WR-PHD Pin Header - Single, 2, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins2 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Working Voltage250 V (AC) | PackagingBag | – | – | GenderPin Header | MountTHT | Length5.08 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | Rated Current3 A | – | TypeStraight | |||
 | WR-TBL Series 102 - 5.00 mm Horizontal Entry Modular, 2, Wire Protector | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-TBL Series 102 - 5.00 mm Horizontal Entry Modular | Pins2 | PCB/Cable/PanelPCB | ModularityYes | Wire Section 22 to 14 (AWG) 0.75 to 1.5 (mm²) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Working Voltage250 V (AC) | PackagingBox | – | – | – | MountTHT | Length10 mm | Operating Temperature -40 °C up to +105 °C | Height10 mm | – | – | – | – | – | – | – | – | Rated Current17.5 A | – | TypeHorizontal | |||
 | WR-PHD Pin Header - Single, 3, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins3 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Working Voltage250 V (AC) | PackagingBag | – | – | GenderPin Header | MountTHT | Length7.62 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | Rated Current3 A | – | TypeStraight | |||
 | WR-PHD Pin Header - Single, 4, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Working Voltage250 V (AC) | PackagingBag | – | – | GenderPin Header | MountTHT | Length10.16 mm | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | Rated Current3 A | – | TypeStraight | |||
 | WR-USB Mini/Micro Connectors, 5, Mini USB 2.0 | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-USB Mini/Micro Connectors | Pins5 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Working Voltage30 V (AC) | PackagingTape and Reel & Mylar | Interface TypeType B | Variantwith Pads & Pegs | GenderReceptacle | MountSMT | – | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | Rated Current1 A | – | TypeHorizontal | |||
 | WE-MPSB EMI Multilayer Power Suppression Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MPSB EMI Multilayer Power Suppression Bead | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size0805 | – | – | – | – | – | – | – | – | – | – | – | MountSMT | Length2 mm | Operating Temperature -55 °C up to +125 °C | Height0.9 mm | – | – | – | – | – | Impedance @ 100 MHz320 Ω | Maximum Impedance347 Ω | Maximum Impedance170 MHz | Rated Current2.5 A | Impedance @ 1 GHz108 Ω | TypeHigh Current | ||||
 | WE-LQS SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size2512 | Inductance22 µH | Saturation Current0.55 A | DC Resistance910 mΩ | Self Resonant Frequency22 MHz | – | – | – | – | – | – | – | MountSMT | Length2.5 mm | Operating Temperature -40 °C up to +125 °C | Height1.2 mm | – | – | – | – | – | – | – | – | Rated Current0.45 A | – | – | ||||
| WE-LQS SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size5020 | Inductance4.7 µH | Saturation Current2.7 A | DC Resistance55.9 mΩ | Self Resonant Frequency57 MHz | – | – | – | – | – | – | – | MountSMT | Length5 mm | Operating Temperature -40 °C up to +125 °C | Height2 mm | – | – | – | – | – | – | – | – | Rated Current2.3 A | – | – | ||||
| WE-LQS SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size5020 | Inductance22 µH | Saturation Current1.35 A | DC Resistance225 mΩ | Self Resonant Frequency22 MHz | – | – | – | – | – | – | – | MountSMT | Length5 mm | Operating Temperature -40 °C up to +125 °C | Height2 mm | – | – | – | – | – | – | – | – | Rated Current1.15 A | – | – | ||||
 | WL-SMCW SMT Mono-color Chip LED Waterclear, –, – | Downloads26 files RAY files
| Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | – | – | – | – | Dominant Wavelength [typ.]625 nm | Emitting ColorRed | Peak Wavelength [typ.]630 nm | – | – | – | – | – | – | – | Luminous Intensity [typ.]250 mcd | – | – | – | Forward Voltage [typ.]2 V | – | – | – | Chip TechnologyAlInGaP | Viewing Angle Phi 0° [typ.]140 ° | – | Size0603 | – | – | – | – | – | – | – | PackagingTape and Reel | – | – | – | MountSMT | Length1.6 mm | Operating Temperature -40 °C up to +85 °C | Height0.7 mm | – | – | – | – | – | – | – | – | – | – | – | |||
| WL-SMCW SMT Mono-color Chip LED Waterclear, –, – | Downloads26 files RAY files
| Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | – | – | – | – | Dominant Wavelength [typ.]590 nm | Emitting ColorYellow | Peak Wavelength [typ.]595 nm | – | – | – | – | – | – | – | Luminous Intensity [typ.]120 mcd | – | – | – | Forward Voltage [typ.]2 V | – | – | – | Chip TechnologyAlInGaP | Viewing Angle Phi 0° [typ.]140 ° | – | Size0603 | – | – | – | – | – | – | – | PackagingTape and Reel | – | – | – | MountSMT | Length1.6 mm | Operating Temperature -40 °C up to +85 °C | Height0.7 mm | – | – | – | – | – | – | – | – | – | – | – | |||
| WL-SMCW SMT Mono-color Chip LED Waterclear, –, – | Downloads26 files RAY files
| Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | – | – | – | – | Dominant Wavelength [typ.]525 nm | Emitting ColorGreen | Peak Wavelength [typ.]515 nm | – | – | – | – | – | – | – | Luminous Intensity [typ.]430 mcd | – | – | – | Forward Voltage [typ.]3.2 V | – | – | – | Chip TechnologyInGaN | Viewing Angle Phi 0° [typ.]140 ° | – | Size0603 | – | – | – | – | – | – | – | PackagingTape and Reel | – | – | – | MountSMT | Length1.6 mm | Operating Temperature -40 °C up to +85 °C | Height0.7 mm | – | – | – | – | – | – | – | – | – | – | – | |||
| WL-SMCW SMT Mono-color Chip LED Waterclear, –, – | Downloads27 files RAY files
| Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | – | – | – | – | Dominant Wavelength [typ.]470 nm | Emitting ColorBlue | Peak Wavelength [typ.]465 nm | – | – | – | – | – | – | – | Luminous Intensity [typ.]145 mcd | – | – | – | Forward Voltage [typ.]3.2 V | – | – | – | Chip TechnologyInGaN | Viewing Angle Phi 0° [typ.]140 ° | – | Size0603 | – | – | – | – | – | – | – | PackagingTape and Reel | – | – | – | MountSMT | Length1.6 mm | Operating Temperature -40 °C up to +85 °C | Height0.7 mm | – | – | – | – | – | – | – | – | – | – | – | |||
 | WL-SWTC SMT White Top view Ceramic LED, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SWTC SMT White Top view Ceramic LED | – | – | – | – | – | Emitting ColorMoonlight | – | – | – | – | – | – | – | Luminous Flux [typ.]121 lm | – | – | – | – | Forward Voltage [typ.]3.2 V | – | – | – | Chip TechnologyInGaN | Viewing Angle Phi 0° [typ.]120 ° | Color Rendering Index [typ.]75 | Size3535 | – | – | – | – | – | – | – | PackagingTape and Reel | – | – | – | MountSMT | Length3.45 mm | Operating Temperature -40 °C up to +125 °C | Height0.71 mm | – | – | – | – | – | – | – | – | – | – | – | ||||
 | WR-DC Power Jacks, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-DC Power Jacks | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Center pin Ø2 mm | Recommended Plug outer Ø5.5 mm | Working Voltage30 V (AC) | PackagingBag | – | – | – | MountTHT | – | Operating Temperature -40 °C up to +85 °C | – | – | – | – | – | – | – | – | – | Rated Current5 A | – | TypeRight Angled | |||
 | WS-TASV J-Bend SMT Tact Switch 3.5x2.9 mm, –, – | Simulation– | Downloads5 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWS-TASV J-Bend SMT Tact Switch 3.5x2.9 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | PackagingTape and Reel | – | – | – | – | – | Operating Temperature -40 °C up to +85 °C | Height1.7 mm | Operation Force350 g | Electrical Life200000 Cycles | Actuator ColorBlue | WashableNo | Vaporphase processnot specified | – | – | – | Rated Current0.05 A | – | – | ||
 | WL-SFTW SMT Full-color TOP LED Waterclear, –, – | Simulation– | Downloads26 files RAY files
| Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SFTW SMT Full-color TOP LED Waterclear | – | – | – | – | – | Emitting ColorRed & Green & Blue | – | Peak Wavelength (Blue) [typ.]465 nm | Peak Wavelength (Green) [typ.]515 nm | Peak Wavelength (Red) [typ.]635 nm | Dominant Wavelength (Blue) [typ.]470 nm | Dominant Wavelength (Green) [typ.]520 nm | Dominant Wavelength (Red) [typ.]625 nm | – | – | Luminous Intensity (Blue) [typ.]400 mcd | Luminous Intensity (Green) [typ.]1700 mcd | Luminous Intensity (Red) [typ.]750 mcd | – | Forward Voltage (Blue) [typ.]3.2 V | Forward Voltage (Green) [typ.]3.2 V | Forward Voltage (Red) [typ.]2 V | Chip TechnologyAlInGaP + InGaN | Viewing Angle Phi 0° [typ.]120 ° | – | Size3528 | – | – | – | – | – | – | – | PackagingTape and Reel | – | – | – | MountSMT | – | Operating Temperature -40 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – |