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A6285 Datasheet(PDF) 5 Page - Allegro MicroSystems |
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A6285 Datasheet(HTML) 5 Page - Allegro MicroSystems |
5 / 13 page 16-Channel Constant-Current Latched LED Driver with Open LED Detection and Dot Correction A6285 5 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com ELECTRICAL CHARACTERISTICS at TA1 = 25°C, VDD = 3.0 to 5.5 V, unless otherwise noted Characteristic Symbol Test Conditions Min. Typ.2 Max. Unit Logic Supply Voltage Range VDD Operating 3.0 5.0 5.5 V LED Load Supply Output Voltage VLED Operating – – 12.0 V Undervoltage Lockout VDD(UV) VDD 0 → 5.0 V 2.5 2.7 2.9 V VDD 5 → 0.0 V 2.3 2.5 2.7 V Output Current IO VDS = 1 V, REXT = 600 Ω 70 80 90 mA VDS = 1 V, REXT = 1.2 kΩ 35 40 45 mA Output to Output Matching Error4 Err 1 V = VDS(x), REXT = 600 Ω; All outputs on – +1.0 +4.0 % 1 V = VDS(x), REXT = 1.2 kΩ; All outputs on – +1.0 +4.0 % Load Regulation ∆IOreg VDS(X) = 1 to 3 V, REXT = 600 Ω; All outputs on – – +6.0 % Output Leakage Current IDSS VOH = 12 V – – 0.5 μA Logic Input Voltage VIH 0.8×VDD –VDD V VIL GND – 0.2×VDD V Logic Input Voltage Hysteresis VIhys All digital inputs 250 – 900 mV Logic Input Current II All digital inputs –1 – 1 μA SDO Voltage VOL IOL = 1 mA – – 0.5 V VOH IOH = –1 mA VDD–0.5 – – V Supply Current3 IDD(OFF) REXT = 9.6 kΩ, VOE = 5 V – – 6 mA REXT = 1.2 kΩ, VOE = 5 V – – 17 mA IDD(ON) All outputs on, REXT = 1.2 kΩ, VO = 1 V, data transfer 30 MHz – – 25 mA All outputs on, REXT = 600 Ω, VO = 1 V, data transfer 30 MHz –26 35 mA FAULT Output VOUT(0) IOUT = 5 mA; faults asserted – – 0.4 V IOUT(1) VOUT = 5.5 V, open drain; faults negated – – 1 μA Active Pull-up IOUT(0) VLED = 1 V, all outputs off – 2.8 – mA Thermal Shutdown Temperature TJTSD Temperature increasing – 165 – °C Thermal Shutdown Hysteresis TJTSDhys –15–°C Open LED Detection Threshold VLOD – 0.30 0.40 V Reference Voltage at REXT VEXT REXT = 600 Ω 1.21 1.25 1.31 V 1Tested at 25°C. Specifications are assured by design and characterization over the operating temperature range of –40°C to 85°C. 2Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for individual units, within the specified maximum and minimum limits. 3Recommended operating range: VO = 1.0 to 3.0 V. 4Err = (IO(min or max) – IO(av)) / IO(av). Operating Characteristics |
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