IRPLDIM2E

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Manufacturer: International Rectifier


Features:

· Lamp Type:1×36W T8 Lamp
· Line Input: 185-265 VAC/50 Hz
· Interface DALI (2 wires)
· High Power Factor/ Low THD
· High Frequency Operation
· Programmable Lamp Filament Preheating
· Programmable Ignition
· High precision Digital Dimming
· Logarithmic Dimming
· Diagnostic and fault control
· Lamp Fault Protection
· Brownout Protection
· IR21592 HVIC Ballast Controller
· PIC16F628 Microcontroller
· Optically Isolated Communications
· Low power standby mode


Description

The IRPLDIM2E Demo Board consists of an EMI filter, an active power factor correction front end, a ballast control section, a digital control section and a resonant lamp output stage. A block diagram of the design is shown in Figure 3.

The EMI filter blocks ballast generated noise. The power factor correction is used for sinusoidal input current and a regulated DC bus.  The ballast control section provides frequency modulation control of a traditional RLC lamp resonant output circuit for preheating, igniting and ballasting the lamp. The IRPLDIM2E is easily adaptable to a wide variety of lamp types. The digital control section IRPLDIM2E provides the Digitally Addressable Lighting Interface (DALI) and the neces-sary circuitry and software to perform closed-loop dimming, lamp fault detection, shutdown and auto-restart.