Datenblatt-Suchmaschine für elektronische Bauteile |
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LM3466 Datenblatt(PDF) 3 Page - Texas Instruments |
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LM3466 Datenblatt(HTML) 3 Page - Texas Instruments |
3 / 23 page LM3466 www.ti.com SNOSB96F – JUNE 2011 – REVISED NOVEMBER 2013 ELECTRICAL CHARACTERISTICS –40°C ≤ TJ ≤ 125°C, VIN = 48 V (unless otherwise stated) PARAMETER CONDITIONS MIN TYP MAX UNITS VIN pin under-voltage lockout (UVLO) VIN-UVLO-UPPER Input voltage increasing 4.06 4.78 5.30 V upper threshold VIN-UVLO-HYS VIN pin UVLO hysteresis Input voltage decreasing, TA = 25°C 0.52 V IIN Operating current to the VIN pin 550 640 µA VEQ = 200 mV, TA = 25°C 197.1 200 201.0 VSEN SEN pin voltage regulation mV VEQ = 200 mV 195.6 200 201.5 ISEN SEN pin bias current out VSEN = 0 V 9.35 10.29 11.23 µA ILED-OFF ILED pin off current VILED = 70 V 0.1 0.6 µA Integrated power MOSFET on- RDS(on) IILED = 300 mA 0.5 1.2 Ω resistance VSRC-OPEN SRC pin open circuit threshold VSEN = VSRC, VCOMM = 0 V 25 31 37 mV ILIMIT Current limit VSEN = VSRC = 0 V, VILED = 3 V 1.75 2.06 2.35 A COMMILOW COMM pin pull-low current VCOMM = 5 V 34 54 µA COMM pin to ground through a 10-k Ω COMMVHIGH COMM pin pull-high voltage 6.0 V resistor TSD Thermal shutdown 150 °C Connection Diagrams Figure 1. DDA (SO PowerPAD) Package, 8 Pins Figure 2. NEC (TO-220) Package, 7 Pins (Top View) (Top View) PIN DESCRIPTIONS PINS NAME I/O DESCRIPTION DDA NEC Open-drain status output. Indicates the status of the LM3466 including startup, LED string COMM 2 6 O active/inactive, thermal shutdown. GND 5 4 — Ground. Connects to ground. Current regulator input. Connects to the drain of the integrated power MOSFET. Connects this pin to ILED 1 5 I the cathode of an LED string. Connects a capacitor from this pin to ground to minimize noise if the connecting cable to the LED string is long. SEN 6 2 I Current sense input. Senses the voltage of an external current sensing resistor. 7 Source of power MOSFET. Connects to the source of the integrated power MOSFET. Connect this SRC 3 O pin to an external current sensing resistor. 8 Control voltage. Connects to the VEQ pin of other LM3466 with a 51- Ω resistor in series with a 1-µF VEQ 4 1 O capacitor to ground. Input voltage supply. Connects to voltage supply from 6 V to 70 V. Connects a 10-nF capacitor from VIN 3 7 I this pin to ground for decoupling. Thermal Pad — Thermal connection pad. Connects to a ground plane. Copyright © 2011–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM3466 |
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