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LM3812 Datasheet(PDF) 8 Page - National Semiconductor (TI) |
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LM3812 Datasheet(HTML) 8 Page - National Semiconductor (TI) |
8 / 14 page Typical Application Circuits In the application circuits, the 0.1 µF ceramic capacitor between pins 1 and 8 is used for bypassing, and the 0.1 µF ceramic capacitor between pins 3 and 4 is used for filtering. Shutdown (SD) is tied to VDD through a 10 k Ω resistor. (Continued) DS100122-7 FIGURE 3. Paralleling LM3812 for Higher Load Current I TOTAL = 2.2(D1−0.5)IMAX + 2.2(D2−0.5)IMAX where D 1 is the duty cycle of PWM1 and D2 is the duty cycle of PWM2. Please refer to the Product Operation section for more information. DS100122-8 FIGURE 4. High Voltage Operation — V IN Greater Than 5.25V (High Side Sense) (PWM output is referred to Pin 7) www.national.com 8 |
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