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LM3524D bảng dữ liệu(PDF) 11 Page - Texas Instruments |
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LM3524D bảng dữ liệu(HTML) 11 Page - Texas Instruments |
11 / 29 page LM2524D, LM3524D www.ti.com SNVS766E – JUNE 2009 – REVISED MAY 2013 Figure 15. The amplifier's inputs have a common-mode input range of 1.5V–5.5V. The on board regulator is useful for biasing the inputs to within this range. Current Limiting The function of the current limit amplifier is to override the error amplifier's output and take control of the pulse width. The output duty cycle drops to about 25% when a current limit sense voltage of 200 mV is applied between the +CL and −CLsense terminals. Increasing the sense voltage approximately 5% results in a 0% output duty cycle. Care should be taken to ensure the −0.7V to +1.0V input common-mode range is not exceeded. In most applications, the current limit sense voltage is produced by a current through a sense resistor. The accuracy of this measurement is limited by the accuracy of the sense resistor, and by a small offset current, typically 100 μA, flowing from +CL to −CL. Output Stages The outputs of the LM3524D are NPN transistors, capable of a maximum current of 200 mA. These transistors are driven 180° out of phase and have non-committed open collectors and emitters as shown in Figure 16. Figure 16. Copyright © 2009–2013, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LM2524D LM3524D |
Số phần tương tự - LM3524D_15 |
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Mô tả tương tự - LM3524D_15 |
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