N4L Product

1
????????
??????????????????????,???????????,?????,???
??????????????,PWM???????,???????????????
2
?????????

• ???????????????,????,????????????????????????????
  ???????,????????,??????,???????????????
• ?????????????,??????????????,???????????????,?????
  ?????,??????????????????????(?????)?
• ????????????????????????????????????????????????

3
?????????

• ??,??,????????????????????????,???????(SMPS)??????
  (UPS)??????????????
• ??????????????,????,???,????????????????,?????????
  ?????????????????????

4
???????????

• ????
• ??(??,load switching),???????????
• ????,??????????????(trial-and-error)
• ????
• ??(Spice),??????????????????
• ????(FRA),????????????????????????????

5
???

• ??????????????????????????,???????????,???????????
  ????????????????????????
• ????,?????????0dB???20dB/Decade???????????????????
  ???gt20dB/Decade????????????????????
• ???????????????????????0dB(???)????????(Phase
  Margin)????45????????????????????(Gain
  Margin)????-20dB???????????,???????????????

6
????????

• ?????lt40,?????????????????????????45?????????50
  80 ????????????????????????gt80????????,??????
  
• ???????Fc??,??????????????,????????????,??????????
  ?????????????
• ?????????????????????????????????
• ?????????Fc??????????????45?
• ?????????????,??????????????????

7
??SPICE???ACTUAL

• ?????????????????????,??????UPS???????,
  ??DC40V???????,?????????,????
• ???????65 ????-15dB
• ???????88 ????-33dB

8
??????????
CAP SPEC ESR lt7.5?
CAP REAL ESR 0.3?
CAP SPEC ESR lt7.5?
CAP REAL ESR 0.3?
9
???????

1. ??????????????????,??????????,????????gt45?
2. ??????????????????,??????????,???????????????
3. ??????????????????????????????????,
   ??????????????,??????

10
???????
11
?????????
???????????????,????,??????????????????
????????, ??????????
????? ????? ????? ????? ????? ????? ????? ????? ?????
?? ?? ?? ?? ?? ?? ?? ?? ??
?? 1 2 3 4 5 6 7 8 9
?? 10 11 12 13 14 15 16 17 18
?? 19 20 21 22 23 24 25 26 27
????1?2???????????
12
???????????

• ????????????(error signal)????????,?????????????
  (Frequency Response Analyzer) ??????????
• PSM2200/1700 ?? DFT (Discrete Fourier Transform)
  ?????????????????????????
• ?????????,???(bode plot graph)??????????????PSM220
  0/1700 ???????????????????????????????
  ??????????????????????????

13
??????
14
????
15
???????

• ???????,?????????? GAIN1 GAIN2 - 2GAIN2 1 -
  GAIN1GAIN2?????????????????,??????????
• ??????(??????)?????????????????????,
  ????????????????
• ??????( 5V?12V)????,??????????????????????? 5V
  ??,??12V ??????????,?????12V ???????,12V???????
  ?
• ?????????????12V???? 5V?12V????????????????????
  ????,?????????????????????

16
PSM2200/1700???
OUTPUTSet 300mV (Vpk, No Loaded), the inject
signal is 11.9mV (after injection transformer)
Phase Margin 65.13 ?
Phase 0 ?
Gain 0dB
Gain Margin -30dB
489Hz
8kHz
100Hz
10kHz
1kHz
100kHz
17
PSM2200/1700???
OUTPUTSet 1.5V (Vpk, No Loaded), the inject
signal is 57.4mV (after injection transformer)
Phase Margin 72.25 ?
Phase 0 ?
Gain 0dB
Gain Margin -30dB
100Hz
10kHz
1kHz
318Hz
100kHz
8kHz