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Durel IC Drivers

Durel IC Drivers. * Covered under one or more of the following patents -- 5,313,141; 5,780,975; 5,789,870. Durel 3-Port Circuit. Proprietary 3P topology: Provides shared common ground for improved EMI/RFI and audible noise management

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Durel IC Drivers

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  1. Durel IC Drivers * Covered under one or more of the following patents -- 5,313,141; 5,780,975; 5,789,870

  2. Durel 3-Port Circuit • Proprietary 3P topology: • Provides shared common ground for improved EMI/RFI and audible noise management • Eliminates need for 3 layer lamps or additional shielding • Simplifies solution for driving multiple lamp segments Switch Mode - “3P” Integrated Circuit

  3. Advantages of Durel EL Drivers • Patented 3P topology • Shared common ground provides improved EMI/RFI and audible noise management • Eliminates need for 3 electrode lamps • Simplicity when driving multiple lamp segments • High level of integration • Proven low variability in high volume applications • Large foundry partners ensure quality product and stable source of supply

  4. Noise Sources • EMI/RFI • Can be handled using good EE practices. • Mechanical • Electrostrictive • Electrostatic

  5. Durel Low-Noise EL Drivers Noise Signal of EL Lamp on Typical Chip Driver • dV/dt reduced during L discharge • electrical noise minimized • quieter EL lamp output Noise Signal of EL Lamp on D365* Low-Noise IC Driver * Covered under one or more of the following patents -- 5,313,141; 5,780,975; 5,789,870

  6. Solutions for Mechanical Noise Reduce or eliminate audible noise by: • Using integrated low noise EL driver (e.g. Durel D365, D371,D372, D381) • Noise-dampening materials and adhesives • Electrical isolation (3P driver or additional ground layers/planes) • Using appropriate inductor • Using high performance HV cap

  7. Solutions for Electrical Noise Avoid EMI/RFI noise by: • Practicing fundamental EE techniques. • Bypass cap • Tight layout • Ground and power planes • Faraday shielding, where appropriate • Using 3-port EL driver output • Using low noise EL drivers • D365 • D371 • D381 • D372

  8. Wave-shapingTM • Feature of the D371, D372, D381, D305 • Optimize output waveform for lower noise • Control dV/dt during lamp discharge cycle to compensate for EL lamp size, frequency, or peak voltage * Covered under one or more of the following patents -- 5,313,141; 5,780,975; 5,789,870

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