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LM3532 Fiches technique(PDF) 4 Page - Texas Instruments |
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LM3532 Fiches technique(HTML) 4 Page - Texas Instruments |
4 / 47 page LM3532 SNVS653D – JULY 2011 – REVISED JUNE 2013 www.ti.com ELECTRICAL CHARACTERISTICS (1) (2) Limits in standard type face are for TA = +25°C and those in boldface type apply over the full operating ambient temperature range ( −30°C ≤ TA ≤ +85°C). Unless otherwise specified VIN = 3.6V. Symbol Parameter Conditions Min Typ Max Units 2.7V ≤ VIN ≤ 5.5V, ControlX Full-Scale Output Current Regulation Accuracy ILED(1/2/3) Current Register = 0xF3, Brightness 18.68 20.2 21.8 mA (ILED1, ILED2 or ILED3) Code = 0xFF 2.7V ≤ VIN ≤ 5.5V, IFULL_SCALE = IMATCH (3), (4) ILED2 to ILED3 Current Matching −2 0.3 2 % 20.2mA, Brightness Code = 0xFF Regulated Current Sink Headroom VREG_CS 400 mV Voltage Current Sink Minimum Headroom ILED = 95% of nominal, ILED = 20.2 VHR 200 240 mV Voltage mA RDSON NMOS Switch On Resistance ISW = 100 mA 0.25 Ω ICL NMOS Switch Current Limit 2.7V ≤ VIN ≤ 5.5V 880 1000 1120 mA ON Threshold, 2.7V ≤ VIN ≤ 5.5V 40 41 42 VOVP Output Over-Voltage Protection V Hysteresis 1 fSW Switching Frequency 2.7V ≤ VIN ≤ 5.5V 450 500 550 kHz DMAX Maximum Duty Cycle 94 % DMIN Minimum Duty Cycle 10 % Quiescent Current into IN, Device ILED1 = ILED2 = ILED3 = 20.2 mA, IQ 490 µA Not Switching feedback disabled. ILED1 = ILED2 = ILED3 = 20.2 mA, VOUT IQ_SW Switching Supply Current 1.35 mA = 32V ISHDN Shutdown Current 2.7V ≤ VIN ≤ 5.5V, HWEN = GND 1 2 µA Full-Scale Current =20.2 mA Minimum LED Current in ILED1, ILED_MIN Brightness code = 0x01, Mapping = 9.5 µA ILED2 or ILED3 Exponential Thermal Shutdown +140 TSD °C Hysteresis 15 LOGIC INPUTS/OUTPUTS (PWM1, PWM2, HWEN, SCL, SDA, INT) VIL Input Logic Low 2.7V ≤ VIN ≤ 5.5V 0 0.4 V VIH Input Logic High 2.7V ≤ VIN ≤ 5.5V 1.2 VIN VOL Output Logic Low (SCL, INT) 2.7V ≤ VIN ≤ 5.5V, ILOAD = 3mA 0.4 V PWM Input Internal Pulldown RPWM 100 k Ω Resistance (PWM1, PWM2) I2C-COMPATIBLE TIMING SPECIFICATIONS (SCL, SDA, )(5) t1 SCL (Clock Period) 2.5 µs t2 Data In Setup Time to SCL High 100 ns t3 Data Out Stable After SCL Low 0 ns SDA Low Setup Time to SCL Low t4 100 ns (Start) SDA High Hold Time After SCL High t5 100 ns (Stop) AMBIENT LIGHT SENSOR INPUTS (ALS1, ALS2) ALS1, ALS2 Resistor Select Register RALS1, RALS2 ALS Pin Internal Pulldown Resistors = 0x0F, 2.29 2.44 2.59 k Ω 2.7V ≤ VIN ≤ 5.5V (1) All voltages are with respect to the potential at the GND pin. (2) Min and Max limits are verified by design, test, or statistical analysis. Typical numbers are not verified, but do represent the most likely norm. Unless otherwise specified, conditions for typical specifications are: VIN = 3.6V and TA = +25°C. (3) All Current sinks for the matching spec are assigned to the same Control Bank. (4) LED current sink matching between ILED2 and ILED3 is given by taking the difference between either (ILED2 or ILED3) and the average current between the two, and dividing by the average current between the two (ILED2/3 – ILED(AVE))/ILED(AVE). This simplifies to (ILED2 – ILED3)/(ILED2 + ILED3). In this test, both ILED2 and ILED3 are assigned to Bank A. (5) SCL and SDA must be glitch-free in order for proper brightness control to be realized. 4 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: LM3532 |
Numéro de pièce similaire - LM3532_13 |
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Description similaire - LM3532_13 |
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