EPCOS / TDK Outdoor & Industrial LED Solutions with Lumileds

More About EPCOS / TDK

EPCOS / TDK Outdoor and Industrial LED Solutions with Lumileds feature a broad range of inductors, capacitors, and protection devices for LED lighting technology, which offers substantial energy-saving potential. Energy-saving lamps and LED lighting systems from Lumileds use 80% less energy than conventional technologies. EPCOS offers key technologies supporting electronic ballasts and power supplies for LED lighting systems from Lumileds.

Overview

Input Protection

Input protection includes varistors and inrush current limiters. Input varistors reduce voltage spikes on the incoming power by shorting the spikes to ground. The initial current surge caused by the capacitors in the power supply circuits is smoothed and limited by the inrush current limiters.

Input Varistors
EPCOS varistors are ideally suited for limiting surge voltage and current as well as for absorbing energy and ESD protection. These optimum overvoltage protection components include radial leaded discs, surface-mount, thermal-fused, and special types for automotive and telecom applications.
View Input Varistors

Input Inrush Current Limiter
Many equipment items like switch-mode power supplies, electric motors, and transformers exhibit excessive inrush currents when turned on, potentially damaging other components or tripping fuses. With NTC thermistors, it is possible to effectively limit these currents by connecting a thermistor in series with the load. The NTC thermistors specially developed for this application limit the current at turn-on by their relatively high cold resistance. As a result of the current load, the thermistor heats up and reduces its resistance by a factor of 10 to 50, and the power it draws reduces accordingly. NTC thermistors can effectively handle higher inrush currents than fixed resistors with the same power consumption.
View Input Inrush Current Limiter

Input Filtering

The electromagnetic interference (EMI) capacitors, input EMI filters, common mode chokes, and input safety capacitors all contribute to smoothing the power flow to the switching transistors in switch-mode power supplies (SMPS). In addition, they prevent the transients caused by the switching transistors from returning to the input power source, preventing radiation EMI on the incoming lines.

Input EMC Filters
EPCOS EMC filters and reactors ensure electromagnetic compatibility (EMC), including filters offering up to 2500A. Standard applications for these devices are medical devices, power systems, shielded rooms, frequency converters, solar and other power inverters, uninterruptible power supply (UPS) systems, and automotive solutions for electric vehicles (EV).
View Input EMC Filters

Input EMI & Safety Standard Approved Capacitors
These products are available in metallized film and ceramic and are used mainly in industrial, consumer, and lighting applications, such as RFI suppression and prevention of electric shock to humans and animals. These UL- and ENEC-certified components offer self-extinction and overvoltage security, which is ensured by a special resin filling as well as an open-circuit failure mode to avoid dangerous shorts. The available categories are X and Y and their subclasses.
View Input EMI Capacitors

Input Common Mode Chokes
Electrical and electronic equipment often generates common-mode interference. To remove this interference and meet safety requirements, chokes with a high asymmetrically effective inductance are required. EPCOS current-compensated chokes with closed-core topology are ideal for this purpose. By winding two coils with an equal number of turns on the core, it solves the problem of core material saturation. These coils are connected in such a way that the magnetic flux induced by the upper coil is compensated by the lower coil.
View Input Common Mode Chokes

PFC & DC Link

The power factor correction (PFC) choke coils and DC-link capacitors provide a smooth flow of current and voltage to the switching capacitors, which reduces the amount of ripple in the output of the switching transistors. The smoother input also contributes to lower operating temperatures in the active devices.
View PFC Choke Coils

Aluminum Electrolytic Capacitors
These cost-effective capacitors offer relatively shorter life spans and lower ripple current ratings than other dielectric types. They are often the correct choice where high capacitance values are needed in a given space.
View Aluminum Electrolytic Capacitors

DC Film Capacitors
These capacitors are ideal for high-reliability applications where ripple current requirements are high, and a high capacitance value is not required. They may also perform better in shock and vibration applications than ceramic or aluminum electrolytic options.
View Film Capacitors

Multilayer Ceramic Capacitors (MLCC)
MLCCs are a suitable choice where a high density of capacitance is required in a reasonably small size.
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CeraLink™ Capacitors
This ceramic capacitor technology is designed for DC-link and snubber applications for high voltage, high ripple current, and high-temperature applications in high switching frequency applications. Optimal performance is in the 400V_DC to 500V_DC operating range and for switching frequencies between 50kHz and 1MHz. They are not recommended for AC applications.
View CeraLink Capacitors

Conversion & Control

The inrush current limiters, thermistors, and current sensing transformers are used in the control circuitry for the switching transistors. The power transformers change the voltage and current levels as needed for the input and output transistors.

Inrush Current Limiters
EPCOS inrush current limiters are designed to suppress high inrush current surges that can occur when electrical equipment such as SMPS, motors, amplifiers, control boards, and more are powered on. Such high currents are caused by the low impedance of smoothing capacitors or coils.
View Input Inrush Current Limiter

View Power Transformers

View Thermistors

View Input Inrush Current Limiter

Output Filtering, Protection, & Sensing

The output power inductors and the capacitors are used as output EMI filters to prevent switching transients and other EMI artifacts from propagating on output lines. The output protection and sensing varistors and ESD Suppressors are used to protect high-performance LEDs.
View Output SMT Power Inductors

Multilayer Ceramic Capacitors (MLCC)
MLCCs are a suitable choice where a high density of capacitance is required in a reasonably small size.
View MLCC Capacitors

Output Varistors
EPCOS varistors are ideally suited for limiting surge voltage and current as well as for absorbing energy and ESD protection. These optimum overvoltage protection components include radial leaded discs, surface-mount, thermal-fused, and special types for automotive and telecom applications.
View Output Varistors

View ESD Protection Devices