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TPS51125 Datasheet(PDF) 5 Page - Texas Instruments |
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TPS51125 Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 33 page 
www.ti.com TPS51125 SLUS786A – OCTOBER 2007 – REVISED NOVEMBER 2007 ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range, VIN = 12 V (unless otherwise noted) PARAMETER CONDITIONS MIN TYP MAX UNIT Logic Threshold and Setting Conditions Shutdown 0.4 VEN0 EN0 setting voltage Enable, VCLK = off 0.8 1.6 V Enable, VCLK = on 2.4 VEN0 = 0.2 V 2 3.5 5 IEN0 EN0 current µA VEN0 = 1.5 V 1 1.75 2.5 Shutdown 350 400 450 ENTRIP1, ENTRIP2 VEN mV threshold Hysteresis 10 30 60 200 kHz/250 kHz 1.5 245 kHz/305 kHz 1.9 2.1 VTONSEL TONSEL setting voltage 300 kHz/375 kHz 2.7 3.6 365 kHz/460 kHz 4.7 V PWM only 1.5 VSKIPSEL SKIPSEL setting voltage Auto skip 1.9 2.1 OOA auto skip 2.7 Protection: Current Sense IENTRIP ENTRIPx source current VENTRIPx = 920 mV, TA= 25°C 9.4 10 10.6 µA ENTRIPx current temperature TCIENTRIP On the basis of 25 °C 4500 ppm/ °C coefficient ((VENTRIPx-GND/9)-24 mV -VGND-LLx) voltage, VOCLoff OCP comparator offset -8 0 8 VENTRIPx-GND = 920 mV VOCL(max) Maximum OCL setting VENTRIPx = 5 V 185 205 225 mV Zero cross detection VZC VGND-LLx voltage -5 0 5 comparator offset VENTRIP Current limit threshold VENTRIPx-GND voltage, (2) 0.515 2 V Protection: UVP & OVP VOVP OVP trip threshold OVP detect 110% 115% 120% TOVPDEL OVP prop delay 2 µs UVP detect 55% 60% 65% VUVP Output UVP trip threshold Hysteresis 10% TUVPDEL Output UVP prop delay 20 32 40 µs TUVPEN Output UVP enable delay 1.4 2 2.6 ms UVLO Wake up 4.1 4.2 4.3 VUVVREG5 VREG5 UVLO threshold Hysteresis 0.38 0.43 0.48 V VUVVREG3 VREG3 UVLO threshold Shutdown (2) VO2-1 Thermal Shutdown Shutdown temperature (2) 150 TSDN Thermal shutdown threshold °C Hysteresis (2) 10 (2) Ensured by design. Not production tested. Copyright © 2007, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s): TPS51125 |
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