1 - 34
• Output smoothing capacitor C641, C652 : 25V_470M-M
ESR = 0.15
Ω
MAX / 20˚C, 100kHz
Tolerable ripple current = 670mArms / 105˚C, 100kHz
* Tolerable ripple current frequency compensation coefficient = 1
5V output system
Ripple voltage (specifications) = 50mVp-p
Ripple voltage =
∆
I
L
x ESR (0.15
Ω
) = 0.146Ap-p x 0.15
Ω
= 0.022Vp-p
<
=
50mVp-p
OK
Ripple current =
∆
I
L
/2 3 = 0.042 Arms
<
=
Tolerable ripple current (670mArms)
OK
3.3V output system
Ripple voltage (specifications) = 50mVp-p
Ripple voltage =
∆
I
L
x ESR (0.15
Ω
) = 0.121Ap-p x 0.15
Ω
= 0.018Vp-p
<
=
50mVp-p
OK
Ripple current =
∆
I
L
/2 3 = 0.035Arms
<
=
Tolerable ripple current (670mArms)
OK
• Input capacitor C604 : 25V_470M-M
ESR = 0.15
Ω
MAX / 20˚C, 100kHz
Tolerable ripple current = 670mArms / 105˚C, 100kHz
* Tolerable ripple current frequency compensation coefficient = 1
Ripple voltage = D
ON
(1-D
ON
)
D
ON
= V
OUT
/ V
IN
= 5.25V / 12V =0.44
= 0.44 (1-0.44)
=0.50Arms
<
=
Tolerable ripple current (670mArms)
OK
• Oscillation frequency = 1 / (C
T
x R
T
) = 1/ (330pF x 15k
Ω
) = 200kHz
Содержание LCD1550X-BK
Страница 82: ...3 TROUBLE SHOOTING Contents No Power No Picture Abnormal Picture or Ineffective Adjustment 1 2 3 Page 1 2 4 ...
Страница 88: ...SCHEMATIC DIAGRAM POWER LCD1550X Normal Power Save 1ch Pin 4 2ch Pin 1 3ch Pin 2 4ch Pin 5 ...
Страница 89: ...SCHEMATIC DIAGRAM PWB MAIN POWER LCD1550X ...
Страница 90: ...SCHEMATIC DIAGRAM PWB MAIN INPUT LCD1550X ...
Страница 91: ...SCHEMATIC DIAGRAM PWB MAIN SYNC LCD1550X ...
Страница 92: ...SCHEMATIC DIAGRAM PWB MAIN TMDS LCD1550X ...
Страница 96: ...SCHEMATIC DIAGRAM PWB MAIN ASIC LCD1550X ...
Страница 97: ...SCHEMATIC DIAGRAM INVERTER LCD1550X 1ch Q701 B 2ch Q702 B ...
Страница 98: ...SCHEMATIC DIAGRAM PWB SW LCD1550X ...
Страница 100: ...SCHEMATIC DIAGRAM POWER LCD1550X ...
Страница 101: ...SCHEMATIC DIAGRAM PWB MAIN POWER LCD1550X ...
Страница 102: ...SCHEMATIC DIAGRAM PWB MAIN INPUT LCD1550X ...
Страница 103: ...SCHEMATIC DIAGRAM PWB MAIN SYNC LCD1550X ...
Страница 104: ...SCHEMATIC DIAGRAM PWB MAIN TMDS LCD1550X ...
Страница 105: ...SCHEMATIC DIAGRAM PWB MAIN MC LCD1550X ...
Страница 106: ...SCHEMATIC DIAGRAM PWB MAIN ASIC LCD1550X ...
Страница 107: ...SCHEMATIC DIAGRAM INVERTER LCD1550X ...
Страница 108: ...SCHEMATIC DIAGRAM PWB SW LCD1550X ...
Страница 127: ... 16 Document No VSPF A028 Bave Average brightness of 1 to 9 10 50 90 90 10 50 5 1 2 3 6 9 8 7 4 ...
Страница 152: ...LCD1550X BROCHURE LiquidView SCALE NTS DIMENSION IN mm Fig 11A FRONT REAR FINAL CONDITION 420 297 ...
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