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ViewSonic Corporation
Confidential - Do Not Copy
VP2330wb
26
d) Panel interface (Pin B1,B2,C1,C2,D1,D2,A6,B6,A8,B8,A9,B9,A10,B10,) : The Gm1601H driver interface is
highly programmable.
6.1.2 Power Regulator AIC1577 (U23), AP1084 (U16,U20),LT1117(U18): The AIC1577 is a current switching
regulator control IC containing the primary functions required for DC to DC converters and external NMOS
STEP-DOWN PWM controller ,operating input voltaqge from 4.5V to 24V The desired output voltage is determined
by the equation, Volt = 0.8[ ( R218+R219) / R218]. In this case, the output voltage is 5 Volts. The AIC1577 is a low
dropout operation
6.1.3 Power Regulator AP1084 (U16,U20): The AP1084 is a low dropout positive adjustable or fixed mode
regulator with minimum of 5A output current capability. Specifically designed to provide supply for low voltage IC
and low current 3.3V logic supply. AP1084 is guaranteed to have lower than 1.4V dropout at full load
current ,provide well-regulated output of 1.25 to 3.3 with 4.7 to 12V input supply.
6.1.4 Power Regulator LT1117(U18): The LT1117 is a low drop voltage regulator ,provide up to 800 mA of output
current. Concerning fixed version, are offered the output voltage:1.2V,1.8V,2.5V,2.85V,3.0V,3.3V,the regulator to
reach a very tight output voltage tolerance, within ± 1% at 25°C. The adjustable LD1117 is pin to pin compatible
with the other LD1117.
6.3 Power (Inverter) Board
This is a specific power (inverter) board for VP2030B monitor with output of 56W /12V / 2.4A and 20V/1.8A. It
provides 20 VDC to drive the four cold cathode fluorescence tubes in the backlight.
6.3.1 The inverter's electrical specification is described below.
Rated Input Voltage
20Vdc
Input Voltage Range
19 ~ 21 Vdc
Input Current
1.8A(MAX)
Input
On / Off control Voltage
2.5~5.25 for on , 0~1 for off
Rated Output Strike-on Voltage
1800Vrms
Rated Output Voltage
700~900Vrms
Rate Output Frequency
35~80KHz
Output
Rated Output Current
5.5~8.0 mA
Содержание VP2330WB - 23" LCD Monitor
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