In single lamp application, connect this pin to LI2 pin.
3 LI2 I
Lamp current feedback 2. The function of this pin is same as LI1. In
single lamp application, connect this pin to LI1. In multi-lamp application,
this pin is used for lamp current feedback which is out-of-phase of LI1.
4 COMP I
Feedback Compensation Node. Connect a compensation capacitor from
this pin to GND. This pin is also used for IC enable control. A logic low
(below 0.5V) input turns off the IC. The enable logic input signal should
have open collector (OC) structure.
5 FT I
Fault Indicator. Connect a capacitor from this pin to GND to program the
open lamp and short lamp protection delay time. When the voltage on
this pin reaches 1.2V, the IC will shutdown until it is enabled again.
6 FSET I
Switching Frequency Set. Connect a resistor from this pin to GND. This
resistor sets the operating frequency of the MP1009.
7 BOSC I
Burst Repetition Rate Setting. Connect a resistor and a capacitor from
this pin to GND. If the burst dimming is to be controlled by an external
logic signal, connect BOSC to VCC and apply the logic signal to the
DBRT pin.
8 DBRT I
Burst-Mode (Digital) Brightness Control Input. The voltage range of 0V to
1.2V at DBRT linearly sets the burst-mode duty cycle from minimum to
100%. The minimum burst dimming duty can be programmed by BOSC
resistor and capacitor. If burst dimming is not used, connect DBRT to
VCC.
9 VIN I
Input Power Rail. Decouple this pin to GND with >1μF ceramic capacitor.
It is desirable to add a 10
resistor between VIN pin and the input bus.
10 BT O
Output Bootstrap. BT provides gate driver bias for the high-side
MOSFET. Connect a capacitor from BT to SW.
11 TG O
High-Side MOSFET Gate Output. Connect TG to the gate of the
high-side, external power MOSFET.
12 SW O
Bridge Output. Connect SW to the source of the high-side MOSFET and
the drain of the low-side MOSFET.
13 VCC O
Voltage Rail Output. VCC provides power supply for the low-side gate
driver and the internal control circuitry. Bypass VCC to GND with a
ceramic capacitor.
14 BG O
Low-Side MOSFET Gate Output. Connect BG to the gate of the low-side
MOSFET.
15 GND
IC
ground
16 OV1 I
Open lamp voltage feedback input. The function of this pin is same as
OV2
ViewSonic Corporation
VX2433wm-1
VX2433wm-CN
CONFIDENTIAL – DO NOT COPY
49
Summary of Contents for VX2433wm-1
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Page 40: ...BACKCOVER ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 37...
Page 41: ...PANEL BEZEL ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 38...
Page 42: ...KEYPAD CHASIS ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 39...
Page 44: ...IF BOARD ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 41...
Page 86: ...7 Block Diagram ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 83...
Page 88: ...VGA INPUT ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 85...
Page 89: ...DVI INPUT ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 86...
Page 90: ...HDMI INPUT ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 87...
Page 91: ...SCALER ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 88...
Page 92: ...AUDIO ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 89...
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Page 94: ...POWER SUPPLY ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 91...
Page 95: ...INVERTER SUPPLY ViewSonic Corporation VX2433wm 1 VX2433wm CN CONFIDENTIAL DO NOT COPY 92...