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FP3-R47-R 数据表(PDF) 3 Page - Vicor Corporation |
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FP3-R47-R 数据表(HTML) 3 Page - Vicor Corporation |
3 / 14 page UG:301 vicorpower.com Applications Engineering: 800 927.9474 Page 3 2. Default Pin Strap Configuration a. Ensure the pin straps are in the following default locations before proceeding: n ENABLE = Not Used (enabled) n TRIM_UP = Not Used n TRIM_DN = Not Used n OPT1 = Not Used n OPT2 = Not Used 3. Pin Strap Functions a. ENABLE – adding a strap on this pin will cause the converter to shut down. b. TRIM_UP – Adding a strap in this location will adjust the output voltage up by 10%. c. TRIM_DN – Adding a strap in this location will adjust the output voltage down by 10%. Only one strap can be connected at a time. If both trim straps are out, the output voltage should be set to the model’s nominal output. 4. Trimming And Soft Start a. For those customers who wish to trim to another voltage by changing the preset trim resistors to another value, the trim equation shown in Figure 2 can be used: R low = (–V ) • R INT (–Vout nom ) + V desired desired R high = (–RSS) • (–Voutnom) • VERO + V •Vref V ref [(–Vout nom) + V ] desired desired Where: R1 = Rlow R3 = Rhigh VERO = 4.9 and Vref can be found in the appropriate model datasheet. Figure 3 shows an equation for soft start configuration where C7 = CREF C REF = T ssdesired – 230 • 10 −6 23000 ENABLE TRIM/SS SGND RSS Rhigh Rlow VERO Vref PI31xx 10k • • • Figure 4. PI31xx Trimming Equivalent Circuit Figure 2. PI31xx Trim Equation Figure 3. PI31xx Soft Start Equation |
类似零件编号 - FP3-R47-R |
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类似说明 - FP3-R47-R |
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