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LM3630ATMX 数据表(PDF) 5 Page - Texas Instruments |
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LM3630ATMX 数据表(HTML) 5 Page - Texas Instruments |
5 / 51 page LM3630A www.ti.com SNVS974B – APRIL 2013 – REVISED OCTOBER 2015 6.5 Electrical Characteristics Typical limits are for TA = 25°C; minimum and maximum limits apply over the full operating ambient temperature range ( −40°C ≤ TA ≤ 85°C); VIN = 3.6 V, unless otherwise specified. (1) PARAMETER TEST CONDITION MIN TYP MAX UNIT ILED1, Output current regulation 2.5 V ≤ VIN ≤ 5.5 V, full-scale current = 20 mA 19 20 21 mA ILED2 2.5 V ≤ VIN ≤ 5.5 V, ILED = 10 mA, –1% 0.5% 1% TA = 25°C ILED1 to ILED2 current ILED1 on A IMATCH matching (2) ILED2 on B 2.5 V ≤ VIN ≤ 5.5 V, ILED = 10 mA, –2.5% 0.5% 2.5% 0°C ≤ TA ≤ 70°C Regulated current sink VREG_CS ILED = 5 mA 250 headroom voltage mV Current sink minimum VHR ILED = 95% of nominal, ILED = 20 mA 160 240 headroom voltage RDSON NMOS switch on resistance ISW = 100 mA 0.25 Ω 480 600 720 640 800 960 ICL NMOS switch current limit 2.5 V ≤ VIN ≤ 5.5 V mA 800 1000 1200 960 1200 1440 ON threshold, 2.3 V ≤ VIN ≤ 5.5 V 24-V option 23 24 25 Output overvoltage VOVP ON threshold, 2.3 V ≤ VIN ≤ 5.5 V 40-V option 39 41 44 V protection Hysteresis 1 560-kHz shift = 1 538 560 582 500-kHz shift = 0 481 500 518 ƒSW Switching frequency 2.5 V ≤ VIN ≤ 5.5 V kHz 1.12-MHz shift = 1 1077 1120 1163 1-MHz shift = 0 962 1000 1038 DMAX Maximum duty cycle 94% ILED1 = ILED2 = Quiescent current into IQ VIN = 3.6 V 20 mA, feedback 350 µA device, not switching disabled. HWEN = VIN, I 2C 1 4 shutdown ISHDN Shutdown current 2.3 V ≤ VIN ≤ 5.5 V HWEN = GND 1 4 µA Minimum LED current in Full-scale current = 20 mA, BRT = 0x01, Exponential ILED_MIN 13 ILED1 or ILED2 mapping mode Thermal shutdown 140 TSD °C Hysteresis 15 Time period to wait from the assertion of HWEN or after tWAIT Initialization timing software reset, before an I2C transaction will be ACK'ed. 1 ms During this time period an I2C transaction will be NAK'ed (1) Minimum and maximum limits are specified by design, test, or statistical analysis. Typical numbers are not ensured, but do represent the most likely norm. Unless otherwise specified, conditions for typical specifications are: VIN = 3.6 V and TA = 25°C. (2) LED current sink matching between LED1 and LED2 is given by taking the difference between ILED1 and ILED2 and dividing by the sum of ILED1 and ILED2. The formula is (ILED1 − ILED2)/(ILED1 + ILED2) at ILED = 10 mA. ILED1 is driven by Bank A and ILED2 is driven by Bank B. Copyright © 2013–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM3630A |
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类似说明 - LM3630ATMX |
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