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DLPA2005ERSLT Datasheet(PDF) 11 Page - Texas Instruments |
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DLPA2005ERSLT Datasheet(HTML) 11 Page - Texas Instruments |
11 / 55 page DLPA2005 www.ti.com DLPS047B – SEPTEMBER 2014 – REVISED OCTOBER 2015 6.7 Typical Characteristics The maximum output current of the buck-boost is a function of input voltage (VIN), and output voltage (VLED). The relationship between VIN, VLED, and MAX ILED is shown in Figure 2. Please note that VLED is the output of the buck-boost regulator, which includes the voltage drop across the sense resistor RLIM (39 mOhms typical), internal strobe control switch (75 m Ω max), and the forward voltage of the LED. For example, to drive 2.4 A of current through a LED with Vƒ = 4.8 V using the DLPA2005, the minimum input voltage needs to be 4.5 V. 2.3 V < VLED < 4.8 V Figure 2. Maximum LED Output Current as a Function of Input Voltage (VIN) and Buck-Boost Output Voltage (VLED) NOTE Measured on a typical unit. VLED is the output of the buck-boost regulator and includes the voltage drop across the sense resistor, internal strobe control switch, and the forward voltage of the LED. Copyright © 2014–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: DLPA2005 |
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