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ABR-42022 Datasheet

Part Number ABR-42022
Manufacturers Fairchild Semiconductor
Logo Fairchild Semiconductor
Description ML4833 220V Non-Dimming Ballast Design
Datasheet ABR-42022 DatasheetABR-42022 Datasheet (PDF)

August 1997 Application Brief 42022 ML4833 220V Non-Dimming Ballast Design GENERAL DESCRIPTION This Application Brief exists as a supplement to Application Note 63. When used with Application Note 63, this document contains all the necessary information to convert an ML4833 Evaluation Board into a low-cost, non-dimming 220V ballast. This power factor corrected, 60W non-dimming ballast operates over a 187 to 253VRMS line, and is designed to power two series connected F32T8 lamps. The design pres.

  ABR-42022   ABR-42022






ML4833 220V Non-Dimming Ballast Design

August 1997 Application Brief 42022 ML4833 220V Non-Dimming Ballast Design GENERAL DESCRIPTION This Application Brief exists as a supplement to Application Note 63. When used with Application Note 63, this document contains all the necessary information to convert an ML4833 Evaluation Board into a low-cost, non-dimming 220V ballast. This power factor corrected, 60W non-dimming ballast operates over a 187 to 253VRMS line, and is designed to power two series connected F32T8 lamps. The design preserves the features of the dimming ballast, which include: • • • • • • 0.99 minimum power factor Less than 10% THD Programmable starting sequence for low glow current and extended lamp life Greater than 92% efficiency All American On-chip thermal and lamp out detection circuitry Capsco Power down threshold for GFI or end of lamp life protection Future Active Inc. Digi-Key Corp. Premier Magnetics (800) 538-8587 (800) 723-5817, (408) 434-9599 (800) 344-4539 (714) 362-4211 (800) 222-6001 Shaded items in Table 1 indicate changes to the original ML4833 Evaluation Board parts list. VENDOR LIST CONVERSION To convert the ML4833 Evaluation Board to the nondimming design described: 1. 2. 3. 4. Remove the dimmer control interface subassembly. Remove components R2,R3, R16, C4, C5 and T5 (as shown in Figure 2). Ground LAMP FB. Replace R24 and C22 with jumpers and change the values of R21 and R5 per Table 1. The new components (R26, R27, C27 and D14) can be assembled using available wiring at T5. T.


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