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LS7632 Fiches technique(PDF) 2 Page - LSI Computer Systems |
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LS7632 Fiches technique(HTML) 2 Page - LSI Computer Systems |
2 / 4 page The functional differences between LS7631 and LS7632 are: LS7631 - When a LONG touch is applied, the dimming direction auto- matically reverses whenever maximum or minimum conduction an- gles are reached. LS7632 - When a LONG touch is applied, the dimming stops when- ever maximum or minimum conduction angles are reached. In order to change dimming levels from maximum or minimum, LONG touch must be removed and reapplied.The purpose of this feature is to allow the user to positively locate maximum and minimum conduction angles. TABLE 1 MODE SHORT TOUCH LONG TOUCH DIMMING REVERSAL PRE-TOUCH Ø POST-TOUCH Ø PRE-TOUCH Ø POST-TOUCH Ø (Note 5) OFF MAX(Note 1) OFF/MIN Varies up from MIN N/A 0 ON OFF MAX Varies down from MAX N/A INTERMEDIATE Varies from INTERMEDIATE NO OFF MEMORY OFF Varies from memory (Notes 2, 3,4) YES 1 (Notes 2, 3) MIN Varies up from MIN N/A ON OFF MAX Varies down from MAX N/A INTERMEDIATE Varies from INTERMEDIATE YES OFF MAX (Note 1) OFF/MIN Varies up from MIN N/A 2 ON OFF MAX Varies down from MAX N/A INTERMEDIATE Varies from INTERMEDIATE YES Note 1: A soft turn-on is produced by slewing up the conduction angle, ø, from minimum at the rate of 1.4 ˚/4.17ms (60Hz). There are a total of 84 discrete values of ø. Note 2: A soft turn-on is produced by slewing up ø, from minimum to memory. Upon power-up the memory value is defaulted to maximum conduction angle. Note 3: “Memory” refers to the conduction angle, ø, which existed prior to the current off-state. Note 4: A soft turn-on is produced by slewing up ø from minimum to memory upon which the dimming is started. Note 5: NO = Dimming direction does not reverse from prior dimming direction. YES = Dimming direction does reverse from prior dimming direction. N/A = Does not apply. 7631/7632-111902-2 LS7632 NOTE: If the User applies a LONG Touch when the TRIG Conduction Angle is within a “few” degrees of Maximum or Minimum, the TRIG Conduction Angle can move to Maximum or Minimum and stop without the User being able to observe a change in brightness. Therefore, the User should be instructed that if no change in bright- ness is observed in response to a LONG Touch, the LONG Touch should be removed and reapplied in order to produce a change in brightness. ABSOLUTE MAXIMUM RATINGS: PARAMETER SYMBOL VALUE UNIT DC supply voltage VDD - Vss +7 V Any input voltage VIN Vss - 0.3 to VDD + 0.3 V Operating temperature TA 0 to +90 °C Storage temperature TSTG -65 to +150 °C DC ELECTRICAL CHARACTERISTICS: (TA = +25˚C, all voltages referenced to Vss. VDD = +5V unless otherwise noted.) PARAMETER SYMBOL MIN TYP MAX UNIT CONDITION Supply voltage VDD 4.5 5.0 5.5 V - Supply current IDD - 300 400 µA Output unloaded VDD = 5.5V SYNC Lo VISL - - 2.1 V - SYNC Hi VISH 2.9 - - V - EXT, SENS Lo VIEL - - 1.5 V - EXT, SENS Hi VIEH 3.5 - - V - TRIG Lo VOL - 0.2 - V - TRIG Hi VOH - 5.0 - V - TRIG Sink Current ITSNK 35 - - mA VOTRIG = 2.5V |
Numéro de pièce similaire - LS7632 |
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Description similaire - LS7632 |
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