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LM5145 Datasheet(PDF) 11 Page - Texas Instruments |
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LM5145 Datasheet(HTML) 11 Page - Texas Instruments |
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11 / 69 page  Over the recommended operating junction temperature range of –40°C to 150°C (unless otherwise noted), typical values correspond to TJ = 25℃, VVIN = 12 V, VVCCX = 5 V, VVOUT1 = 3.3 V, VVOUT2 = 5 V, VEN1 = VEN2 = 5 V, RRT = 10 kΩ, FSW = 2.2 MHz, no load on the drive outputs (HO1, HOL1, LO1, LOL1, HO2, HOL2, LO2, and LOL2). PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ICOMP- SECOND COMP leakage, secondary mode VCOMP = 1 V, MODE = FB2 = VDDA 10 nA ICOMP-INTLV COMP2 leakage, interleaved mode VCOMP = 1 V, MODE = VDDA, VFB2 = 0 V 10 nA ICOMP-SRC1 EA source current VCOMP = 1 V, VFB = 0.4 V, VMODE = 0 V 190 µA ICOMP-SINK1 EA sink current VCOMP = 1 V, VFB = 0.8 V, VMODE = 0 V 160 µA ICOMP-SRC2 EA source current, ultra-low IQ mode VCOMP = 1 V, VFB = 0.4 V, RMODE = 10 kΩ to AGND 10 µA ICOMP-SINK2 EA sink current, ultra-low IQ mode VCOMP = 1 V, VFB = 0.8 V, RMODE = 10 kΩ to AGND 12 µA VSS-OFFSET EA SS offset with VFB = 0 V Raise VSS until VCOMP > 300 mV 36 mV ADAPTIVE DEADTIME CONTROL VGS-DET VGS detection threshold VGS falling, no load 2.1 V tDEAD1 HO off to LO on dead time 22 ns tDEAD2 LO off to HO on dead time 20 ns DIODE EMULATION (DEMB) VDEMB-LOW DEMB input low threshold 0.8 V VDEMB_Rising DEMB input high threshold 2 V VZC-SW Zero-cross threshold VDEMB = 0 V –7 mV VZC-SS Zero-cross threshold soft start DEMB = VDDA, 50 SW cycles after first HO pulse –6.1 mV VZC-DIS Zero-cross threshold disabled DEMB = VDDA, 1000 SW cycles after first HO pulse 210 mV ENABLE (EN1, EN2) VEN-LOW EN1/2 low threshold VVCCX = 0 V 0.8 V VEN-HIGH-TH EN1/2 high threshold VVCCX = 0 V 2 V IEN-LEAK EN1/2 leakage currernt EN1, EN2 logic inputs only 0.05 µA SWITCHING FREQUENCY (RT) VRT RT regulation voltage 10 kΩ < RRT < 220 kΩ 0.8 V MODE RMODE-HIGH Resistance to AGND for ultra-low IQ 5 kΩ RMODE-LOW Resistance to AGND for normal IQ 0.5 kΩ VMODE-LOW Non-interleaved mode input low threshold 0.8 V VMODE-HIGH Interleaved mode input high threshold 2 V SYNCHRONIZATION INPUT (SYNCIN) VDEMB-LOW DEMB input low threshold 0.8 V VDEMB-HIGH DEMB input high threshold 2 V tSYNC-MIN DEMB minimum pulse width VMODE = 0 V or RMODE = 10 kΩ 20 250 ns FSYNCIN External SYNC frequency range VIN = 8 V to 18 V, % of the nominal frequency set by RRT –20% 20% tSYNCIN-HO1 Delay from DEMB rising to HO1 rising edge 120 ns tSYNCIN- SECOND Delay from DEMB falling edge to HO2 rising edge Secondary mode, MODE = FB2 = VDDA 100 ns tDEMB-FILTER Delay from DEMB low to diode emulation enable VMODE = 0 V or RMODE = 10 kΩ 15 50 µs www.ti.com LM25143 SNVSC10 – MARCH 2022 Copyright © 2022 Texas Instruments Incorporated Submit Document Feedback 11 Product Folder Links: LM25143 |
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