a8483 Allegro MicroSystems, Inc., a8483 Datasheet
a8483
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a8483 Summary of contents
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... A8483-DS, Rev. 1 A8483 1.2 MHz Step-up Converter for Display Bias Supply The A8483 is a current mode step-up dc-to-dc converter, available in a 5-pin 3 mm × thermally enhanced MLP/TDFN lead (Pb) free package. Smaller external components and integrated 36 V switch reduce component count and footprint for a variety of applications. ...
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... Ab so lute Max i mum Rat ings SW Pin ..................................................................................–0 Remaining Pins .................................................................... –0 Operating Ambient Temperature , T .................................... –40°C to 85°C A Junction Temperature, T ............................................................. 150°C J(max) Storage Temperature, T .................................................. –55°C to 150°C S A8483-DS, Rev. 1 Functional Block Diagram Σ Ramp Generator 1 ...
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... V IN Switching Frequency versus Temperature 1.25 1.20 1.15 1.10 1.05 1.00 – Temperature (°C) A8483-DS, Rev 25° (unless otherwise noted Symbol Test Conditions V – IN Active mA, V OUT OUT I SUP Shutdown ( – 0.615 V FB ...
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... GND. Ground reference connected directly to the ground plane. The feedback resistor should have a separate connection directly to this point. EN. Voltage lower than 0.4 V disables the A8483 and puts the control circuit into the low-power sleep mode. Voltage greater than 1.5 V fully enables the A8483. ...
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... V (V) C Figure 10. DC Voltage Dimming Control of Duty Cycle. Performance of circuit shown in figure 11. A8483-DS, Rev. 1 Applications Information Soft Start Output voltage rise time at power-on can be extended by using a soft start circuit, such as the one shown in figure 14 for an OLED application, and in figure 16 for a WLED application. At power- on, the device duty cycle begins initially at a high level, drawing a large current from the input supply, VIN ...
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... Because the values recommended for the Capacitor Selection. capacitors are low, ceramic capacitors are the best choice for this application. To reduce performance variation over temperature changes, low drift types such as X7R and X5R should be used. A8483-DS, Rev µ ...
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... Figure 19. Load Regulation for LCD TV, Plasma TV Bias, FED Display, Varactor Diode Bias; V can operate with a V from 0 with a separate bias supply to operate the A8483 in the normal V SUPPLY by an external power supply, such as 3 using a suitable Zener diode, V A8483-DS, Rev ...
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... C Reference pad layout (reference IPC SON95P300X310-7WEEAN); adjust as necessary to meet application process requirements D Reference pad layout with contact pads only; adjust as necessary to meet application process requirements 0.85 .033 MIN A8483-DS, Rev. 1 Packing 7-in. reel, 1500 pieces/reel Package EK , MLP/TDFN 0.08 [.003] C 0.45 .018 5X 0.30 ...
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... The in for ma tion in clud ed herein is believed rate and reliable. How ev er, Allegro MicroSystems, Inc. assumes no re spon si bil i ty for its use; nor for any in fringe ment of patents or other rights of third parties which may result from its use. Copyright© 2005 AllegroMicrosystems, Inc. A8483-DS, Rev Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www ...