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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LM25145RGYR датащи(PDF) 9 Page - Texas Instruments |
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LM25145RGYR датащи(HTML) 9 Page - Texas Instruments |
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9 / 62 page  9 LM25145 www.ti.com SNVSAT9 – JUNE 2017 Product Folder Links: LM25145 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated Electrical Characteristics (continued) Typical values correspond to TJ = 25°C. Minimum and maximum limits apply over the –40°C to 125°C junction temperature range unless otherwise stated. VIN = 24 V, VEN/UVLO = 1.5 V, RRT = 25 kΩ unless otherwise stated. (1)(2) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT TSYNCIN Delay from SYNCIN leading edge to HO rising 50% to 50% 150 ns 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 = 24 V, VBST = 30 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 ≤ 42 V 98% 99% DC400kHz FSW = 400 kHz, 6 V ≤ VVIN ≤ 42 V 90% 94% VRAMP(min) Ramp valley voltage (COMP at 0% duty cycle) 300 mV kFF PWM feedforward gain (VIN / VRAMP) 6 V ≤ VVIN ≤ 42 V 15 V/V OVERCURRENT 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 IRSTC ILIM current tempco RDS-ON mode 4500 ppm/°C IRDSONTC ILIM current tempco RSENSE mode 0 ppm/°C VILIM-TH ILIM comparator threshold at ILIM –8 –2 3.5 mV SHORT-CIRCUIT PROTECT (SCP) – DUTY CYCLE CLAMP VCLAMP-OS Clamp offset voltage – no current limiting CLAMP to COMP steady state offset voltage 0.2 + VVIN/75 V VCLAMP-MIN Minimum clamp voltage CLAMP voltage with continuous current limiting 0.3 + VVIN/150 V HICCUP MODE FAULT PROTECTION CHICC-DEL Hiccup mode activation delay Clock cycles with current limiting before hiccup off-time activated 128 cycles CHICCUP Hiccup mode off-time after activation Clock cycles with no switching followed by SS/TRK release 8192 cycles DIODE EMULATION VZCD-SS Zero-cross detect (ZCD) soft-start ramp ZCD threshold measured at SW pin 50 clock cycles after first HO pulse 0 mV VZCD-DIS Zero-cross detect disable threshold (CCM) ZCD threshold measured at SW pin 1000 clock cycles after first HO pulse 200 mV VDEM-TH Diode emulation zero-cross threshold Measured at SW with VSW rising –5 0 5 mV 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 THERMAL SHUTDOWN TSD Thermal shutdown threshold TJ rising 175 °C TSD-HYS Thermal shutdown hysteresis 20 °C |
Аналогичный номер детали - LM25145RGYR |
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Аналогичное описание - LM25145RGYR |
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