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L6382D5 Fiches technique(PDF) 3 Page - STMicroelectronics |
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L6382D5 Fiches technique(HTML) 3 Page - STMicroelectronics |
3 / 21 page L6382D5 Device description 3/21 1 Device description Designed in High-voltage BCD Off-line technology, the L6382D5 is provided with 4 inputs pin and a high voltage start-up generator conceived for applications managed by a microcontroller. It allows the designer to use the same ballast circuit for different lamp wattage/type by simply changing the µC software. The digital input pins - able to receive signals up to 400KHz - are connected to level shifters that provide the control signals to their relevant drivers; in particular the L6382D5 embeds one driver for the PFC pre-regulator stage, two drivers for the ballast half-bridge stage (High Voltage, including also the bootstrap function) and the last one to provide supplementary features like preheating of filaments supplied through isolated filaments in dimmable applications. A precise reference voltage (+5V ±2%) able to provide up to 30mA is available to supply the µC in operating mode. Instead, during start-up and save mode the current available at V REF is up to 10mA and it is provided by the internal high voltage start-up generator. The chip has been conceived with advanced power management logic to minimize power losses and increase the application reliability. In the half-bridge section, a patented integrated bootstrap section replaces the external bootstrap diode. The L6382D5 integrates also a function that regulates the IC supply voltage (without the need of any external charge pump) and optimizes the current consumption. Figure 2. Typical system block diagram |
Numéro de pièce similaire - L6382D5 |
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Description similaire - L6382D5 |
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