전자부품 데이터시트 검색엔진 |
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LS7637 데이터시트(PDF) 2 Page - LSI Computer Systems |
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LS7637 데이터시트(HTML) 2 Page - LSI Computer Systems |
2 / 7 page TIMING CHARACTERISTICS (See Figures 2, 3 and 4): PARAMETER SYMBOL MIN TYP MAX UNIT CONDITION SYNC Frequency fS 40 - 70 Hz - SHORT Activation TS1 50 - 417 ms 60Hz TS1 60 - 500 ms 50Hz LONG Activation TS2 433 - Infinite ms 60Hz TS2 520 - Infinite ms 50Hz GATE DRIVE pulse width GDW 2.31 - 7.13 ms 60Hz (see Note 5) GDW 2.78 - 8.56 ms 50Hz Conduction Angle ø 50 - 154 deg - Ø incremental steps ∆ ø - 1.4 - deg - (Note 1) Soft-on slew rate SS - 1.4 - deg / 33.3ms 60Hz SS - 1.4 - deg / 40ms 50Hz A0 to A1/A2 to A0 slew rate SAA - 1.4 - deg / 33.3ms 60Hz (Note 2) SBA - 1.4 - deg / 40ms 50Hz A1 to B1/B2 to A2 slew rate SBA - 1.4 - deg / 66.7ms 60Hz (Note 3) SBA - 1.4 - deg / 80ms 50Hz B1 to B2 delay TBD - 500 - ms 60Hz (Note 4) TBD - 600 - ms 50Hz Note 1: Total number of steps = 77. Note 2: Number of steps from A0 to A1, or A2 to A0 = 55. Note 3: Number of steps from A1 to B1 or B2 to A2 = 21. Note 4: ø is at minimum between B1 and B2. TBD is applicable for LS7636 only. Note 5: For LS7637 when minimum ø is reached, dimming direction reverses only if the LONG Activation is terminated and reapplied. The difference among all versions of LS7636 and LS7637 are: LS7636 (LS7636FO) Upon power-up, the Gate Drive output is Off. (Upon power-up, the Gate Drive output is On at maximum conduction angle.) When a LONG Activation is applied, the dimming direction automatically reverses whenever maximum or minimum conduction angles are reached. LS7637 (LS7637FO) Upon power-up, the Gate Drive is Off. (Upon power-up, the Gate Drive is On at maximum conduc- tion angle.) When a LONG Activation is applied, the dim- ming stops whenever maximum or minimum conduction angles are reached. In order to change dimming levels from maximum or minimum, LONG Activation must be re- moved and reapplied. The purpose of this feature is to al- low the user to positively locate maximum and minimum conduction angles. LS7637 NOTE: If the User applies a LONG Activation when the Gate Drive Conduction Angle is within a "few" de- grees of Maximum or Minimum, the Gate Drive Conduction Angle can move to Maximum or Mini- mum and stop without the User being able to ob- serve a change in brightness. Therefore, the User should be instructed that if no change in bright- ness is observed in response to a LONG Activa- tion, the LONG Activation should be removed and reapplied in order to produce a change in bright- ness. 7636-121906-2 |
유사한 부품 번호 - LS7637 |
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유사한 설명 - LS7637 |
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