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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LM5145 датащи(PDF) 9 Page - Texas Instruments |
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LM5145 датащи(HTML) 9 Page - Texas Instruments |
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9 / 55 page  Typical values correspond to TJ = 25°C. Minimum and maximum limits apply over the –40°C to 150°C junction temperature range unless otherwise stated. VVIN = 48 V, VEN/UVLO = 1.5 V, RRT = 25 kΩ unless otherwise stated. (1) (2) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT IPG-OH PGOOD high state leakage current VFB = 0.8 V, VPGOOD = 13 V 400 nA OSCILLATOR FSW1 Oscilator frequency – 1 RRT = 100 kΩ 100 kHz FSW2 Oscillator frequency – 2 RRT = 25 kΩ 380 400 420 kHz FSW3 Oscillator frequency – 3 RRT = 12.5 kΩ 780 kHz SYNCHRONIZATION INPUT AND OUTPUT FSYNC SYNCIN external clock frequency range % of nominal frequency set by RRT –20% 50% VSYNC-IH SYNCIN input logic high 2 V VSYNC-IL SYNCIN input logic low 0.8 V RSYNC-IN SYNCIN input resistance VSYNCIN = 3 V 20 kΩ TSYNCI-PW SYNCIN input minimum pulsewidth Minimum high state or low state duration 50 ns VSYNCO-OH SYNCOUT high-state output voltage ISYNCOUT = –1 mA (sourcing current) 3 V VSYNCO-OL SYNCOUT low-state output voltage ISYNCOUT = 1 mA (sinking current) 0.4 V TSYNCOUT Delay from HO rising to SYNCOUT leading edge VSYNCIN = 0 V, TS = 1/FSW, FSW set by RRT TS/2 – 140 ns TSYNCIN Delay from SYNCIN rising to HO leading edge 50% to 50% 150 ns GATE DRIVERS RHO-UP HO high state resistance, HO to BST VBST – VSW = 7 V, IHO = –100 mA 1.5 Ω RHO-DOWN HO low state resistance, HO to SW VBST – VSW = 7 V, IHO = 100 mA 0.9 Ω RLO-UP LO high state resistance, LO to VCC VBST – VSW = 7 V, ILO = –100 mA 1.5 Ω RLO-DOWN LO low state resistance, LO to PGND VBST – VSW = 7 V, ILO = 100 mA 0.9 Ω IHOH, ILOH HO, LO source current VBST – VSW = 7 V, HO = SW, LO = AGND 2.3 A IHOL, ILOL HO, LO sink current VBST – VSW = 7 V, HO = BST, LO = VCC 3.5 A BOOTSTRAP DIODE AND UNDERVOLTAGE THRESHOLD VBST-FWD Diode forward voltage, VCC to BST VCC to BST, BST pin sourcing 20 mA 0.75 0.9 V IQ-BST BST to SW quiescent current, not switching VSS/TRK = 0 V, VSW = 48 V, VBST = 54 V 80 µA VBST-UV BST to SW undervoltage detection VBST – VSW falling 3.4 V VBST-HYS BST to SW undervoltage hysteresis VBST – VSW rising 0.42 V PWM CONTROL tON(min) Minimum controllable on-time VBST – VSW = 7 V, HO 50% to 50% 40 60 ns tOFF(min) Minimum off-time VBST – VSW = 7 V, HO 50% to 50% 140 200 ns DC100kHz Maximum duty cycle FSW = 100 kHz, 6 V ≤ VVIN ≤ 60 V 98 99 % DC400kHz FSW = 400 kHz, 6 V ≤ VVIN ≤ 60 V 90 94 % VRAMP(min) RAMP valley voltage (COMP at 0% duty cycle) 300 mV kFF PWM feedforward gain (VIN / VRAMP) 6 V ≤ VVIN ≤ 100 V 15 V/V OVER CURRENT PROTECT (OCP) – VALLEY CURRENT LIMITING IRS ILIM source current, RSENSE mode Low voltage detected at ILIM 90 100 110 µA IRDSON ILIM source current, RDS-ON mode SW voltage detected at ILIM, TJ = 25°C 180 200 220 µA IRDSONTC ILIM current tempco RDS-ON mode 4500 ppm/°C IRSTC ILIM current tempco RSENSE mode 0 ppm/°C VILIM-TH ILIM comparator threshold at ILIM –8 –2 3.5 mV SHORT CIRCUIT PROTECTION (SCP) – DUTY CYCLE CLAMP www.ti.com LM5146 SNVSBV0A – JUNE 2021 – REVISED JUNE 2021 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 9 Product Folder Links: LM5146 |
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