For a given de load with a maximum current ILMAX) operating at a given desirable de voltage Vo, use the following checklist to complete a full-wave rectifier design. Note that the maximum voltage across a single secondary winding of the transformer is denoted VSM and the acceptable minimum-to- maximum ripple in the output voltage is denoted Vr(pp). 1. Look for a Zener diode whose nominal breakdown voltage Vz is equal to the required Vo (see for example Appendix E) and find out the corresponding the maximum current Izu. The maximum load current must be < IzM, and Iz(min) that flows in the Zener diode when the current of the load is maximum should be > Izk. 2. Determine C using the following equation: C = (IL(MAX) + Iz(min)) 120 Vr(pp) if not specified, assume Vr(pp) = 0.1 x VSM and Iz(min) = 0.05 1zM 3. Select the nearest standard value of C from the table given in Appendix F. 4. Determine the diode average forward current using the following equation: iDav IL(MAX) 1+n 200(1+) VSM 2Vr(pp) Rs (4.1) 5. Calculate the peak inverse voltage that a diode in the circuit will have to withstand without breaking down. For the circuit shown in Fig. 4.2, PIV=VSM-0.7-(-VSM) = 2VSM 6. Determine the VRRM rating of the diode based on the PIV. A good practice is to have VRRM = 1.5 PIV (4.2) 7. Determine IF (avg) of the diode. A good practice is to have IF(avg) = 1.5 i Dav 8. Use Appendix D to look for a rectifier diode that has at least the same ratings as determined in the above two steps. 9. Determine the value of the required Rs required to limit the no-load current below IzM: [VSM - Vr(pp - Vz] IZM (4.3) E3 TO E192 ACCORDING TO IEC 60063 E192 E96 E48 E192 E96 E48 E192 E96 E48 E192 E96 100 100 100 178 178 178 316 316 316 562 562 101 320 569 102 324 576 104 328 583 105 332 332 332 106 336 107 107 340 340 109 344 348 352 357 361 137 138 180 182 184 187 187 187 189 191 193 110 110 110 196 111 198 113 200 114 203 115 115 205 117 118 120 121 121 121 123 124 126 127 127 127 129 130 130 132 133 133 133 135 102 105 105 113 118 124 137 140 142 143 143 140 145 147 147 149 150 150 152 165 115 140 154 154 154 156 158 158 160 162 162 164 165 172 174 174 176 147 162 167 169 169 169 Standard Series Values in a Decade for Resistances and Capacitances Appendix F Standard Components Values Resistors 208 210 182 191 301 305 196 196 309 312 200 205 205 213 215 215 218 221 223 210 221 226 226 226 229 232 232 234 237 237 237 240 243 243 246 249 252 255 255 258 261 261 261 264 215 267 267 271 274 274 277 280 280 284 287 287 287 291 294 294 298 249 249 301 309 274 324 348 357 365 365 370 487 493 499 374 374 379 383 383 383 388 392 397 392 402 402 407 412 417 422 422 422 427 432 437 442 448 453 412 432 453 459 464 464 470 475 481 348 442 442 475 365 499 402 549 487 487 464 505 511 511 511 517 523 523 530 301 536 536 536 542 549 556 576 590 590 597 604 649 657 604 612 619 619 626 634 634 642 665 665 673 649 649 715 681 681 681 690 698 698 706 732 768 715 723 732 741 750 750 750 759 768 E48 562 825 590 887 619 777 787 787 787 796 806 806 909 909 920 931 942 816 825 835 845 845 856 866 866 866 876 887 898 931 715 976 825 909 953 953 953 965 976 988 E24 E12 E6 10 10 PIELGRANNN 10 11 12 13 15 16 18 20 22 24 27 30 28877588285 33 36 39 43 47 51 56 62 68 91 12 15 18. 22 27 33 39 47 56 68 82 15 22 33 47 68 E3 10 22 47 Volt 2.4 2.5 2.7 2.8 3.0 3.3 1N746 3.6 1N747 3.9 1N748 4.3 1N749 4.71N750 5.11N751 5.6 1N752 6.0 6.21N753 6.8 1N754 7.5 1N755 8.21N756 8.7 9.11N757 10.01N758 11.0 12.0 1N759 13.01N717 14.0 15.01N718 16.01N719 30.01N725 33.0 1N726 36.0 1N727 39.0 1N728 43.0 1N729 47.0 1N730 51.0 1N731 56.0 1N732 60.0 62.0 1N733 0.4 Watt 17.0 18.0 1N720 19.0 20.01N721 1N968 22.01N722 1N969 24.01N723 1N970 25.0 27.01N724 28.0 1N971 68.0 1N734 75.0 1N735 82.0 1N736 87.0 91.0 1N737 100.0 1N738 110.0 1N739 120.0 1N740 130.0 1N741 140.0 150.0 1N742 160.0 1N743 170.0 180.0 1N744 190.0 200.0 1N745 1N957 1N958 1N959 1N960 1N961 1N962 1N963 1N964 1N965 1N966 1N967 1N972 1N973 1N974 1N975 1N976 1N977 1N978 1N979 1N980 1N981 1N982 1N983 1N984 1N985 1N986 1N987 1N988 1N989 1N990 1N991 1N992 Appendix E ZENER DIODE TABLE 0.5 Watt 1 Watt 1N5221 1N4617 1N5222 1N5223 1N4618 1N4619 1N5226 1N4620 1N4728 1N5227 1N4621 1N5228 1N4622 1N5224 1N5225 1N5229 1N4623 1N5230 1N4624 1N5231 1N4625 1N5232 1N4626 1N5233 1N469 1N5234 1N4627 1N5235 1N4628 1N5246 1N4637 1N5247 1N5248 1N4638 1N5249 1N5250 1N4639 1N5241 1N4633 1N4741 1N5251 IN4640 1N5252 1N4641 1N5253 1N5254 1N4642 1N5255 1N5261 1N5262 1N5263 1N4729 1N4730 1N4731 1N4732 1N5264 1N5265 1N4733 1N4734 1N5236 1N4629 1N4737 UZ8807 1N5343 1N5237 1N4630 1N4738 UZ8808 1N5238 1N4695 1N5239 1N4631 1N4739 UZ8 809 1N5240 1N4632 1N4740 UZ8810 1N5266 1N5267 1N5268 1N5269 1N5270 1N4735 1N4736 1N5271 1N5272 1N5273 1N5274 1N5275 1N5276 1N5277 1N5278 1N5279 1N5280 1N5281 UZ87=UZ88 UZ81=UZ82 1N5242 1N4634 1N5243 1N4635 1N5244 1N5245 1N4636 1N4744 UZ8815 1N5352 1N4745 UZ8816 1N4746 UZ8818 1N4747 1N4748 1N4749 1N4750 1N4742 UZ8812 1N4743 UZ8813 1N5340 1N5341 UZ8806 1N5342 5 Watt UZ8822 UZ8824 UZ8827 1N5333 1N5334 1N5335 1N5336 1N5337 1N5338 1N5339 1N4756 UZ8845 1N4757 UZ8850 1N4758 UZ8856 1N4759 UZ8860 1N4760 UZ8870 1N4761 UZ8875 1N4762 UZ8880 1N5256 IN4643 1N4751 UZ8830 1N5257 1N4644 1N4752 UZ8833 1N5258 1N4645 1N4753 UZ8836 1N5365 1N5259 1N4646 1N5366 1N4754 UZ8840 1N4755 1N5260 1N4647 1N5367 1N4648 1N4763 UZ8890 1N4764 1N5344 1N5345 1N5346 1N5347 1N5353 UZ5816 1N5354 1N5355 UZ5818 1N5356 UZ8820 1N5357 UZ5820 UZ5822 UZ5824 1N5348 1N5349 UZ5812 1N5350 UZ5813 1N5358 1N5359 UZ51-52-53 UZ57-58-59 1N5351 UZ5814 UZ5815 UZ5806 UZ5807 UZ5808 UZ5809 UZ5810 1N5363 1N5364 1N5360 1N5361 UZ5827 1N5362 UZ8110 1N5378 UZ8111 1N5379 UZ8112 1N5380 UZ8113 1N5381 UZ8114 1N5382 UZ5830 UZ5833 UZ5836 UZ5840 1N5368 1N5369 UZ5850 1N5370 UZ5856 1N5371 UZ5860 1N5372 1N5373 1N5374 UZ5875 1N5375 UZ5880 1N5376 1N5377 UZ5890 UZ5310 UZ5311 UZ5312 UZ5313 UZ5314 UZ8115 1N5383 UZ8116 1N5384 UZ8117 1N5385 UZ8118 1N5386 UZ8119 1N5387 UZ8 120 1N5388 UZ5320 UZ5315 UZ5316 UZ5317 UZ5318 UZ5319