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LM3424 Arkusz danych(PDF) 7 Page - Texas Instruments |
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LM3424 Arkusz danych(HTML) 7 Page - Texas Instruments |
7 / 62 page LM3424 www.ti.com SNVS603B – AUGUST 2009 – REVISED OCTOBER 2009 Electrical Characteristics (1) (continued) Specifications in standard type face are for TJ = 25°C and those with boldface type apply over the full Operating Temperature Range ( TJ = −40°C to +125°C). Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = +25°C, and are provided for reference purposes only. Unless otherwise stated the following condition applies: VIN = +14V. Min Typ Max Symbol Parameter Conditions Units (2) (3) (2) VLIM Current Limit Threshold 215 245 275 mV VLIM Delay to Output 35 75 ns tON-MIN Leading Edge Blanking 140 240 340 Time HIGH SIDE TRANSCONDUCTANCE AMPLIFIER Input Bias Current 10 µA Transconductance 20 mA/V Input Offset Current -1.5 0 1.5 µA Input Offset Voltage -5 0 5 mV Transconductance ICSH = 100 µA (4) 500 kHz Bandwidth GATE DRIVER (GATE) RSRC-GATE GATE Sourcing GATE = High 2.0 6.0 Resistance Ω RSNK-GATE GATE Sinking Resistance GATE = Low 1.3 4.5 UNDER-VOLTAGE LOCKOUT and DIM INPUT (nDIM) VTH-nDIM nDIM / UVLO Threshold 1.185 1.240 1.285 V IHYS-nDIM nDIM Hysteresis Current 13 20 27 µA DIM DRIVER (DDRV) RSRC-DDRV DDRV Sourcing DDRV = High 13.5 30.0 Resistance Ω RSNK-DDRV DDRV Sinking Resistance DDRV = Low 3.5 10.0 nDIM rising to DDRV 700 rising ns nDIM rising to DDRV 360 falling SOFT-START (SS) ISS Soft-start current 10 µA THERMAL CONTROL VS VS Voltage IVS = 0A 2.40 2.45 2.50 V IVS = 1 mA TREF input bias current VTREF = 1.5V 0.1 VTSENSE = 1.5V TSENSE Input Bias VTREF = 1.5V 0.1 Current VTSENSE = 1.5V ITGAIN-MAX TGAIN Maximum VTGAIN = 2V 200 600 Sourcing Current µA ITF CSH Current with High- RTGAIN = VTREF = 1.5V 100 side Amplifier Disabled 10 k Ω VTSENSE = 0.5V VTREF = 1.5V 10 VTSENSE = 1.4V VTREF = 1.5V 2 VTSENSE = 1.5V THERMAL SHUTDOWN Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM3424 |
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