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LM3633 Folha de dados(PDF) 5 Page - Texas Instruments |
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LM3633 Folha de dados(HTML) 5 Page - Texas Instruments |
5 / 59 page LM3633 www.ti.com SNVS867 – JUNE 2014 6.5 Electrical Characteristics Limits apply over the full operating ambient temperature range ( −40°C ≤ TA ≤ 85°C) and VIN = 3.6 V, unless otherwise specified. (1) (2) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY VOLTAGE (IN PIN) ISHDN Shutdown current 2.7 V ≤ VIN ≤ 5.5 V, HWEN = GND 1 5.5 µA THERMAL SHUTDOWN Thermal shutdown 140 TSD °C Hysteresis 15 BOOST CONVERTER AND HVLED Full-scale current = 20.2 mA, PWM off, brightness code = max, exponential 18.38 22.02 2.7 V ≤ VIN ≤ 5.5 V 20.2 mA mapping, auto headroom (–9%) (9%) off, HVLED1 Bank A, Output current regulation HVLED2/3 Bank B IHVLED(1/2/3) (HVLED1, HVLED2 or Full-scale current = 20.2 TA = 25°C –3.4% ±2.0% 3.2% HVLED3) mA, PWM off, brightness TA = 25°C, –3.6% 3.4% code = max, exponential 3.0 V ≤ VIN ≤ 4.5 V mapping, auto headroom off, HVLED1 Bank A, TA = 25°C ±2.0% HVLED2/3 Bank B 2.7 V ≤ VIN ≤ 5.5 V, –2.5% 2.5% ILED = 20.2 mA PWM off, exponential HVLED1 to HVLED2 or mapping, auto headroom TA = 25°C, IMATCH_HV –2.0% 1.7% HVLED3 matching (3) off ILED = 20.2 mA HVLED1,2,3 = Bank A, 2.7 V ≤ VIN ≤ 5.5 V –8.5% 8.5% ILED = 500 µA ILED_MIN Minimum LED current Full-scale current = 20.2 mA, Exponential Mapping 6.0 µA Regulated current sink VREG_CS Auto headroom off, TA = 25°C 400 headroom voltage mV Minimum current sink ILED = 95% of nominal, full- 2.7 V ≤ VIN ≤ 5.5 V 285 VHR_HV headroom voltage for scale current = 20.2 mA, TA = 25°C 190 HVLED current sinks auto headroom off NMOS switch on RDSON ISW = 500 mA, TA = 25°C 0.3 Ω resistance 880 1120 ICL_BOOST NMOS switch current limit mA TA = 25°C 1000 2.7 V ≤ VIN ≤ 5.5 V 38.75 41.1 ON threshold Output overvoltage OVP select bits = 11 VOVP TA = 25°C 40 V protection Hysteresis TA = 25°C 1 Boost frequency select bit = 2.7 V ≤ VIN ≤ 5.5 V 450 550 0 TA = 25°C 500 fSW Switching frequency kHz Boost frequency select bit = 2.7 V ≤ VIN ≤ 5.5 V 900 1100 1 TA = 25°C 1000 DMAX Maximum duty cycle 2.7 V ≤ VIN ≤ 5.5 V 94% CHARGE PUMP AND LVLED Full-scale current = 20.2 Output current regulation ILVLED(1/2/3/4/5/6) mA, brightness code = 2.7 V ≤ VIN ≤ 5.5 V 18.38 20.2 22.02 mA (low-voltage current sinks) 0xFF (1) All voltages are with respect to the potential at the GND pin. (2) Minimum and Maximum limits are verified by design, test, or statistical analysis. Typical (Typ) numbers are not verified, but do represent the most likely norm. Unless otherwise specified, conditions for typical specifications are: VIN = 3.6 V and TA = 25°C. (3) LED current sink matching in the high-voltage current sinks (HVLED1 through HVLED3) is given as the maximum matching value between any two current sinks, where the matching between any two high voltage current sinks (X and Y) is given as (IHVLEDX ( or IHVLEDY) - IAVE(X-Y))/(IAVE(X-Y)) x 100. In this test all three HVLED current sinks are assigned to Bank A. Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM3633 |
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