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Length: 2432 (0x980)
Types: RcTekst
Names: »99110087.WP«
└─⟦7fab0c8ae⟧ Bits:30005866/disk3.imd Dokumenter i RcTekst format (RCSL 99-1-*)
└─⟦this⟧ »99110087.WP«
╱04002d4e0a00060000000003014131400000000000000000000000000000000000000000000000000a0f19232d37414b555f69737d8791ff04╱
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↓
┆14┆┆b3┆┆06┆┆0b┆↲
┆b0┆POW502↲
↲
100 W ┆84┆Series resonant mains switched powersupply. ↲
↲
Specifications:↲
↲
U in: 220 Volt 200 min↲
╞ ╞ ╞ 250 max↲
╞ fmin = 45 Hz↲
╞ fmax = 500 Hz↲
↲
U out: +5V adjustable within ┆a1┆+┆e1┆5%↲
+12V fixed tolerance ┆a1┆+┆e1┆10%↲
-12V fixed tolerance ┆a1┆+┆e1┆10%↲
↲
I out: +5V max 20A↲
+12V max 8A↲
-12V max 0,1A↲
↲
Ptot out: max 100W↲
↲
Functional description.↲
↲
Referring to the blockdiagram, the Powersupply contains 4 ↓
sections:↲
↲
╞ 1 the mains rectifier↲
╞ 2 the switcher↲
╞ 3 the series resonator and powertransformer↲
╞ 4 the secondary rectifier↲
↲
1. ┆84┆The mains rectifier contains noisefilter, rectifier bridge and ↓
┆19┆┆83┆┄┄primary storage capacitor.↲
↲
2. ┆84┆The switches is composed by an oscillator with a frequency ↓
┆19┆┆83┆┄┄controlled via an optocoupler by the voltage control on the ↓
┆19┆┆83┆┄┄+5V secondary section.↲
↲
════════════════════════════════════════════════════════════════════════
↓
┆84┆The oscillator frequency increases with increasing current in ↓
┆19┆┆83┆┄┄the optocoupler.↲
↲
┆84┆The oscillator derives two MOSFET power transistors generating ↓
┆19┆┆83┆┄┄a 310 volt peak to peak square wave of app. 100 KHz. This ↓
┆19┆┆83┆┄┄squarewave is fed into the resonance circuit.↲
↲
3. ┆84┆The resonance circuit has two functions:↲
↲
a. ┆84┆to smooth out the squarewave and thereby reduce the common ↓
┆19┆┆86┆┄┄mode noise generated by the switcher over the ↓
┆19┆┆86┆┄┄powertransformer.↲
↲
b. ┆84┆to transform the variable amplitude squarewave (varying ↓
┆19┆┆86┆┄┄with mains voltage) to a constant voltage sinuswave, the ↓
┆19┆┆86┆┄┄amplitude of which is controlled by means of the ↓
┆19┆┆86┆┄┄oscillatorfrequency: As the frequency decreases approaching ↓
┆19┆┆86┆┄┄the resonant frequency, the amplitude increases.↲
↲
4. ┆84┆The secondary section is divided in a 5 volt and a 12 volt ↓
┆19┆┆83┆┄┄part. In both the series inductor is large enough to ensure ↓
┆19┆┆83┆┄┄that current flows constantly in the rectifier diodes. 5 volts ↓
┆19┆┆83┆┄┄is derived as the commutated mean voltage on the corresponding ↓
┆19┆┆83┆┄┄secondary winding. 5 volt is regulated by feedback to the ↓
┆19┆┆83┆┄┄oscillator via the optocoupler. Plus and minus 12 volt are ↓
┆19┆┆83┆┄┄regulated in series regulators.↲
↲
┆84┆The power ok circuit is activated when the 5V voltage is high ↓
┆19┆┆83┆┄┄enough for the power input to be reduced (when current begins ↓
┆19┆┆83┆┄┄to flow in the optocoupler).↲
↲
════════════════════════════════════════════════════════════════════════
↓
↲
════════════════════════════════════════════════════════════════════════
↓
↲
┆1a┆┆1a┆┄┄enough fo
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0x083…0a0 0a 14 b3 06 0b 0d 0a b0 50 4f 57 35 30 32 0d 0a 0d 0a 31 30 30 20 57 20 84 53 65 72 69 ┆ POW502 100 W Seri┆
0x0a0…0c0 65 73 20 72 65 73 6f 6e 61 6e 74 20 6d 61 69 6e 73 20 73 77 69 74 63 68 65 64 20 70 6f 77 65 72 ┆es resonant mains switched power┆
0x0c0…0e0 73 75 70 70 6c 79 2e 20 0d 0a 0d 0a 20 20 20 20 20 20 53 70 65 63 69 66 69 63 61 74 69 6f 6e 73 ┆supply. Specifications┆
0x0e0…100 3a 0d 0a 0d 0a 20 20 20 20 20 20 55 20 69 6e 3a 20 20 32 32 30 20 56 6f 6c 74 20 20 20 20 32 30 ┆: U in: 220 Volt 20┆
0x100…120 30 20 6d 69 6e 0d 0a 09 09 09 20 32 35 30 20 6d 61 78 0d 0a 09 20 20 20 20 66 6d 69 6e 20 3d 20 ┆0 min 250 max fmin = ┆
0x120…140 20 34 35 20 48 7a 0d 0a 09 20 20 20 20 66 6d 61 78 20 3d 20 35 30 30 20 48 7a 0d 0a 0d 0a 20 20 ┆ 45 Hz fmax = 500 Hz ┆
0x140…160 20 20 20 20 55 20 6f 75 74 3a 20 2b 35 56 20 61 64 6a 75 73 74 61 62 6c 65 20 77 69 74 68 69 6e ┆ U out: +5V adjustable within┆
0x160…180 20 a1 2b e1 35 25 0d 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 2b 31 32 56 20 66 69 78 65 64 20 ┆ + 5% +12V fixed ┆
0x180…1a0 74 6f 6c 65 72 61 6e 63 65 20 a1 2b e1 31 30 25 0d 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 2d ┆tolerance + 10% -┆
0x1a0…1c0 31 32 56 20 66 69 78 65 64 20 74 6f 6c 65 72 61 6e 63 65 20 a1 2b e1 31 30 25 0d 0a 0d 0a 20 20 ┆12V fixed tolerance + 10% ┆
0x1c0…1e0 20 20 20 20 49 20 6f 75 74 3a 20 2b 35 56 20 20 6d 61 78 20 32 30 41 0d 0a 20 20 20 20 20 20 20 ┆ I out: +5V max 20A ┆
0x1e0…200 20 20 20 20 20 20 2b 31 32 56 20 6d 61 78 20 20 38 41 0d 0a 20 20 20 20 20 20 20 20 20 20 20 20 ┆ +12V max 8A ┆
0x200…220 (1,) 20 2d 31 32 56 20 6d 61 78 20 30 2c 31 41 0d 0a 0d 0a 20 20 20 20 20 20 50 74 6f 74 20 6f 75 74 ┆ -12V max 0,1A Ptot out┆
0x220…240 3a 20 6d 61 78 20 31 30 30 57 0d 0a 0d 0a 46 75 6e 63 74 69 6f 6e 61 6c 20 64 65 73 63 72 69 70 ┆: max 100W Functional descrip┆
0x240…260 74 69 6f 6e 2e 0d 0a 0d 0a 52 65 66 65 72 72 69 6e 67 20 74 6f 20 74 68 65 20 62 6c 6f 63 6b 64 ┆tion. Referring to the blockd┆
0x260…280 69 61 67 72 61 6d 2c 20 74 68 65 20 50 6f 77 65 72 73 75 70 70 6c 79 20 63 6f 6e 74 61 69 6e 73 ┆iagram, the Powersupply contains┆
0x280…2a0 20 34 20 0a 73 65 63 74 69 6f 6e 73 3a 0d 0a 0d 0a 09 31 20 74 68 65 20 6d 61 69 6e 73 20 72 65 ┆ 4 sections: 1 the mains re┆
0x2a0…2c0 63 74 69 66 69 65 72 0d 0a 09 32 20 74 68 65 20 73 77 69 74 63 68 65 72 0d 0a 09 33 20 74 68 65 ┆ctifier 2 the switcher 3 the┆
0x2c0…2e0 20 73 65 72 69 65 73 20 72 65 73 6f 6e 61 74 6f 72 20 61 6e 64 20 70 6f 77 65 72 74 72 61 6e 73 ┆ series resonator and powertrans┆
0x2e0…300 66 6f 72 6d 65 72 0d 0a 09 34 20 74 68 65 20 73 65 63 6f 6e 64 61 72 79 20 72 65 63 74 69 66 69 ┆former 4 the secondary rectifi┆
0x300…320 65 72 0d 0a 0d 0a 31 2e 20 84 54 68 65 20 6d 61 69 6e 73 20 72 65 63 74 69 66 69 65 72 20 63 6f ┆er 1. The mains rectifier co┆
0x320…340 6e 74 61 69 6e 73 20 6e 6f 69 73 65 66 69 6c 74 65 72 2c 20 72 65 63 74 69 66 69 65 72 20 62 72 ┆ntains noisefilter, rectifier br┆
0x340…360 69 64 67 65 20 61 6e 64 20 0a 19 83 80 80 70 72 69 6d 61 72 79 20 73 74 6f 72 61 67 65 20 63 61 ┆idge and primary storage ca┆
0x360…380 70 61 63 69 74 6f 72 2e 0d 0a 0d 0a 32 2e 20 84 54 68 65 20 73 77 69 74 63 68 65 73 20 69 73 20 ┆pacitor. 2. The switches is ┆
0x380…3a0 63 6f 6d 70 6f 73 65 64 20 62 79 20 61 6e 20 6f 73 63 69 6c 6c 61 74 6f 72 20 77 69 74 68 20 61 ┆composed by an oscillator with a┆
0x3a0…3c0 20 66 72 65 71 75 65 6e 63 79 20 0a 19 83 80 80 63 6f 6e 74 72 6f 6c 6c 65 64 20 76 69 61 20 61 ┆ frequency controlled via a┆
0x3c0…3e0 6e 20 6f 70 74 6f 63 6f 75 70 6c 65 72 20 62 79 20 74 68 65 20 76 6f 6c 74 61 67 65 20 63 6f 6e ┆n optocoupler by the voltage con┆
0x3e0…400 74 72 6f 6c 20 6f 6e 20 74 68 65 20 0a 19 83 80 80 2b 35 56 20 73 65 63 6f 6e 64 61 72 79 20 73 ┆trol on the +5V secondary s┆
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0x440…460 61 73 69 6e 67 20 63 75 72 72 65 6e 74 20 69 6e 20 0a 19 83 80 80 74 68 65 20 6f 70 74 6f 63 6f ┆asing current in the optoco┆
0x460…480 75 70 6c 65 72 2e 0d 0a 0d 0a 20 20 20 84 54 68 65 20 6f 73 63 69 6c 6c 61 74 6f 72 20 64 65 72 ┆upler. The oscillator der┆
0x480…4a0 69 76 65 73 20 74 77 6f 20 4d 4f 53 46 45 54 20 70 6f 77 65 72 20 74 72 61 6e 73 69 73 74 6f 72 ┆ives two MOSFET power transistor┆
0x4a0…4c0 73 20 67 65 6e 65 72 61 74 69 6e 67 20 0a 19 83 80 80 61 20 33 31 30 20 76 6f 6c 74 20 70 65 61 ┆s generating a 310 volt pea┆
0x4c0…4e0 6b 20 74 6f 20 70 65 61 6b 20 73 71 75 61 72 65 20 77 61 76 65 20 6f 66 20 61 70 70 2e 20 31 30 ┆k to peak square wave of app. 10┆
0x4e0…500 30 20 4b 48 7a 2e 20 54 68 69 73 20 0a 19 83 80 80 73 71 75 61 72 65 77 61 76 65 20 69 73 20 66 ┆0 KHz. This squarewave is f┆
0x500…520 65 64 20 69 6e 74 6f 20 74 68 65 20 72 65 73 6f 6e 61 6e 63 65 20 63 69 72 63 75 69 74 2e 0d 0a ┆ed into the resonance circuit. ┆
0x520…540 0d 0a 33 2e 20 84 54 68 65 20 72 65 73 6f 6e 61 6e 63 65 20 63 69 72 63 75 69 74 20 68 61 73 20 ┆ 3. The resonance circuit has ┆
0x540…560 74 77 6f 20 66 75 6e 63 74 69 6f 6e 73 3a 0d 0a 0d 0a 20 20 20 61 2e 20 84 74 6f 20 73 6d 6f 6f ┆two functions: a. to smoo┆
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0x580…5a0 79 20 72 65 64 75 63 65 20 74 68 65 20 63 6f 6d 6d 6f 6e 20 0a 19 86 80 80 6d 6f 64 65 20 6e 6f ┆y reduce the common mode no┆
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0x5c0…5e0 65 72 20 74 68 65 20 0a 19 86 80 80 70 6f 77 65 72 74 72 61 6e 73 66 6f 72 6d 65 72 2e 0d 0a 0d ┆er the powertransformer. ┆
0x5e0…600 0a 20 20 20 62 2e 20 84 74 6f 20 74 72 61 6e 73 66 6f 72 6d 20 74 68 65 20 76 61 72 69 61 62 6c ┆ b. to transform the variabl┆
0x600…620 (3,) 65 20 61 6d 70 6c 69 74 75 64 65 20 73 71 75 61 72 65 77 61 76 65 20 28 76 61 72 79 69 6e 67 20 ┆e amplitude squarewave (varying ┆
0x620…640 0a 19 86 80 80 77 69 74 68 20 6d 61 69 6e 73 20 76 6f 6c 74 61 67 65 29 20 74 6f 20 61 20 63 6f ┆ with mains voltage) to a co┆
0x640…660 6e 73 74 61 6e 74 20 76 6f 6c 74 61 67 65 20 73 69 6e 75 73 77 61 76 65 2c 20 74 68 65 20 0a 19 ┆nstant voltage sinuswave, the ┆
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0x680…6a0 6c 65 64 20 62 79 20 6d 65 61 6e 73 20 6f 66 20 74 68 65 20 0a 19 86 80 80 6f 73 63 69 6c 6c 61 ┆led by means of the oscilla┆
0x6a0…6c0 74 6f 72 66 72 65 71 75 65 6e 63 79 3a 20 41 73 20 74 68 65 20 66 72 65 71 75 65 6e 63 79 20 64 ┆torfrequency: As the frequency d┆
0x6c0…6e0 65 63 72 65 61 73 65 73 20 61 70 70 72 6f 61 63 68 69 6e 67 20 0a 19 86 80 80 74 68 65 20 72 65 ┆ecreases approaching the re┆
0x6e0…700 73 6f 6e 61 6e 74 20 66 72 65 71 75 65 6e 63 79 2c 20 74 68 65 20 61 6d 70 6c 69 74 75 64 65 20 ┆sonant frequency, the amplitude ┆
0x700…720 69 6e 63 72 65 61 73 65 73 2e 0d 0a 0d 0a 34 2e 20 84 54 68 65 20 73 65 63 6f 6e 64 61 72 79 20 ┆increases. 4. The secondary ┆
0x720…740 73 65 63 74 69 6f 6e 20 69 73 20 64 69 76 69 64 65 64 20 69 6e 20 61 20 35 20 76 6f 6c 74 20 61 ┆section is divided in a 5 volt a┆
0x740…760 6e 64 20 61 20 31 32 20 76 6f 6c 74 20 0a 19 83 80 80 70 61 72 74 2e 20 49 6e 20 62 6f 74 68 20 ┆nd a 12 volt part. In both ┆
0x760…780 74 68 65 20 73 65 72 69 65 73 20 69 6e 64 75 63 74 6f 72 20 69 73 20 6c 61 72 67 65 20 65 6e 6f ┆the series inductor is large eno┆
0x780…7a0 75 67 68 20 74 6f 20 65 6e 73 75 72 65 20 0a 19 83 80 80 74 68 61 74 20 63 75 72 72 65 6e 74 20 ┆ugh to ensure that current ┆
0x7a0…7c0 66 6c 6f 77 73 20 63 6f 6e 73 74 61 6e 74 6c 79 20 69 6e 20 74 68 65 20 72 65 63 74 69 66 69 65 ┆flows constantly in the rectifie┆
0x7c0…7e0 72 20 64 69 6f 64 65 73 2e 20 35 20 76 6f 6c 74 73 20 0a 19 83 80 80 69 73 20 64 65 72 69 76 65 ┆r diodes. 5 volts is derive┆
0x7e0…800 64 20 61 73 20 74 68 65 20 63 6f 6d 6d 75 74 61 74 65 64 20 6d 65 61 6e 20 76 6f 6c 74 61 67 65 ┆d as the commutated mean voltage┆
0x800…820 (4,) 20 6f 6e 20 74 68 65 20 63 6f 72 72 65 73 70 6f 6e 64 69 6e 67 20 0a 19 83 80 80 73 65 63 6f 6e ┆ on the corresponding secon┆
0x820…840 64 61 72 79 20 77 69 6e 64 69 6e 67 2e 20 35 20 76 6f 6c 74 20 69 73 20 72 65 67 75 6c 61 74 65 ┆dary winding. 5 volt is regulate┆
0x840…860 64 20 62 79 20 66 65 65 64 62 61 63 6b 20 74 6f 20 74 68 65 20 0a 19 83 80 80 6f 73 63 69 6c 6c ┆d by feedback to the oscill┆
0x860…880 61 74 6f 72 20 76 69 61 20 74 68 65 20 6f 70 74 6f 63 6f 75 70 6c 65 72 2e 20 50 6c 75 73 20 61 ┆ator via the optocoupler. Plus a┆
0x880…8a0 6e 64 20 6d 69 6e 75 73 20 31 32 20 76 6f 6c 74 20 61 72 65 20 0a 19 83 80 80 72 65 67 75 6c 61 ┆nd minus 12 volt are regula┆
0x8a0…8c0 74 65 64 20 69 6e 20 73 65 72 69 65 73 20 72 65 67 75 6c 61 74 6f 72 73 2e 0d 0a 0d 0a 20 20 20 ┆ted in series regulators. ┆
0x8c0…8e0 84 54 68 65 20 70 6f 77 65 72 20 6f 6b 20 63 69 72 63 75 69 74 20 69 73 20 61 63 74 69 76 61 74 ┆ The power ok circuit is activat┆
0x8e0…900 65 64 20 77 68 65 6e 20 74 68 65 20 35 56 20 76 6f 6c 74 61 67 65 20 69 73 20 68 69 67 68 20 0a ┆ed when the 5V voltage is high ┆
0x900…920 19 83 80 80 65 6e 6f 75 67 68 20 66 6f 72 20 74 68 65 20 70 6f 77 65 72 20 69 6e 70 75 74 20 74 ┆ enough for the power input t┆
0x920…940 6f 20 62 65 20 72 65 64 75 63 65 64 20 28 77 68 65 6e 20 63 75 72 72 65 6e 74 20 62 65 67 69 6e ┆o be reduced (when current begin┆
0x940…960 73 20 0a 19 83 80 80 74 6f 20 66 6c 6f 77 20 69 6e 20 74 68 65 20 6f 70 74 6f 63 6f 75 70 6c 65 ┆s to flow in the optocouple┆
0x960…967 72 29 2e 0d 0a 0d 0a ┆r). ┆
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