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TPS40400RHLT Datasheet(PDF) 4 Page - Texas Instruments |
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TPS40400RHLT Datasheet(HTML) 4 Page - Texas Instruments |
4 / 56 page TPS40400 SLUS930A – APRIL 2011 – REVISED JULY 2011 www.ti.com ELECTRICAL CHARACTERISTICS (continued) Unless otherwise stated, these specifications apply for –40°C ≤ TJ ≤ 125°C, VDD= 12 Vdc, FREQUENCY_SWITCH = 600 kHz PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SOFT-START Soft-start time (3) Factory default setting 2.7 3.1 3.5 ms tSS Accuracy 600 μs ≤ tSS ≤ 9 ms –15% 15% ERROR AMPLIFIER GBWP Gain bandwidth product(4) 15 20 MHz AOL DC gain(4) 60 dB IIBFB Input bias current: FB (out of pin) 0 100 nA IIBT Input bias current: TRACK (out of pin) 0 250 nA IEAOP Output source current VFB = 0 V, VCOMP ≥ 2 V 1 mA IEAOM Output sink current VFB = 2 V, VCOMP ≤ 0.3 V 1 VCOMPH Error amplifier high output voltage VFB = 0 V 3.8 V VCOMPL Error amplifier low output voltage VFB = 2 V 50 mV VTRACK(ofst) TRACK pin offset voltage –5 +5 mV CURRENT SENSE AMPLIFIER IISNS+ ISNS+ bias current 200 nA IISNS– ISNS – bias current 100 μA VICM Input common mode range 0.45 15 V AOCM Common mode gain –80 dB VLIN Input linear range, VISNS+ - VISNS-(5) –45 110 mV CURRENT LIMIT PROTECTION tOFF Off time between restart attempts 6 × tSS ms VCS+ – VCS– voltage that trips OC fault function Factory default settings(5), TJ = 25°C 27 30 33 mV 3 V ≤ VVDD ≤ 20 V, –10% 10% 30 mV ≤ VILIMTH ≤ 110 mV, TJ = 25°C Threshold accuracy VILIMTH 3V ≤ VVDD ≤ 20 V, VILIMTH ≤ 30 mV, –3 3 mV TJ = 25°C Comparator offset VILIMTH = 30 mV, TJ = 25°C –3 3 mV Temperature coefficient(4) 4000 ppm/ °C tDLYOC Overcurrent delay 3-mV overdrive, TJ = 25°C 155 ns VCS+ – VCS– voltage that sets warning status Factory default settings, TJ = 25°C 12 15 18 mV 3 V ≤ VVDD ≤ 20V, –10% 10% 1.9 mV ≤ VILIMTH ≤ 120 mV, TJ = 25°C Threshold accuracy VILIMW 3V ≤ VVDD ≤ 20 V, VILIMTH < 30 mV, –3 3 mV TJ = 25°C Comparator offset VILIMTH = 20 mV, TJ = 25°C –3 3 mV Temperature coefficient(4) 4000 ppm/ °C tDLYOCW Overcurrent warning delay(4) 3-mV overdrive 250 ns (3) See applications section for more information regarding soft-start time setting. (4) Ensured by design. Not production tested. (5) The entire current ripple waveform must reside inside the linear range for current reading results to be accurate. DC current level must be zero or greater for accurate results. Current sense does not support applications that sink current. Transient voltages (such as ripple) are permitted to go below 0 V, but must be within the specified linear range. 4 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s) :TPS40400 |
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