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LM3555 데이터시트(PDF) 6 Page - Texas Instruments |
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LM3555 데이터시트(HTML) 6 Page - Texas Instruments |
6 / 38 page 6 LM3555 SNVS594G – DECEMBER 2008 – REVISED APRIL 2016 www.ti.com Product Folder Links: LM3555 Submit Documentation Feedback Copyright © 2008–2016, Texas Instruments Incorporated Electrical Characteristics (continued) Unless otherwise specified: typical limits are for TA = 25°C; minimum and maximum limits apply over the full operating ambient temperature range ( −30°C ≤ TA ≤ +85°C); VIN = 3.6 V. (1)(2) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT (3) TA (minimum) = 0°C to account for self-heating. Current Limit specification uses VIN (maximum) = 4 V to account for the input voltage range where current limit could be reached based upon the maximum application specifications for output voltage and diode current. Operation above 4 V and up to 5.5 V is allowed and must not reach current limit. ILIM Peak current limit 2.7 V ≤ VIN ≤ 5.5 V (3) Current limit register value = 00 1.183 1.250 1.55 A Current limit register value = 01 1.417 1.500 1.781 Current limit register value = 10 1.512 1.750 2.025 Current limit register value = 11 1.805 2 2.267 OSCILLATOR AND TIMING SPECIFICATIONS (NON-I2C INTERFACE TIMING) ƒSW Switching frequency 2.7 V ≤ VIN ≤ 5.5 V 1.91 ( −4.5%) 2 2.15 (7.5%) MHz tHW Hardware flash timeout Default timer 850 msec tRU Current ramp-up time ILED = 0mA to ILED = fullscale, VOUT = 6.5 V, VLED = 6.2 V 0.6 1 msec tRD Current ramp down time ILED = fullscale to ILED = 0 mA VOUT = 6.5 V, VLED = 6.2 V 0.2 0.5 msec tTORCH-DG Torch deglitching time 6.3 9 11.7 msec CONTROL INTERFACE VOLTAGE SPECIFICATIONS VI2C/EN I2C/EN pin voltage threshold 2.7 V ≤ VIN ≤ 5.5 V Simple mode 0.54 V I2C mode 1.26 VIL Low-level threshold voltage (SCL/EN1 and SDA/EN2) 2.7 V ≤ VIN ≤ 5.5 V 0.54 V VIH High-level threshold voltage (SCL/EN1 and SDA/EN2) 2.7 V ≤ VIN ≤ 5.5 V 1.26 V VOL Low-level output threshold limit (SDA/EN2) ILOAD = 3 mA 0.4 V |
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