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NCP1230D65R2G Datasheet(PDF) 11 Page - ON Semiconductor

Part # NCP1230D65R2G
Description  Low-Standby Power High Performance PWM Controller
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1230D65R2G Datasheet(HTML) 11 Page - ON Semiconductor

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NCP1230
www.onsemi.com
11
OPERATING DESCRIPTION
Introduction
The NCP1230 is a current mode controller which provides
a high level of integration by providing all the required
control logic, protection, and a PWM Drive Output into a
single chip which is ideal for low cost, medium to high
power off−line application, such as notebook adapters,
battery chargers, set−boxes, TV, and computer monitors.
The NCP1230 can be connected directly to a high voltage
source providing lossless startup, and eliminating external
startup circuitry. In addition, the NCP1230 has a PFC_VCC
output pin which provides the bias supply power for a Power
Factor Correction controller, or other logic. The NCP1230
has an event management scheme which disables the
PFC_VCC output during standby, and overload conditions.
PFC_VCC
As shown on the internal NCP1230 diagram, an internal
low impedance switch SW1 routes Pin 6 (VCC) to Pin 1
when the power supply is operating under nominal load
conditions. The PFC_VCC signal is capable of delivering up
to 35 mA of continuous current for a PFC Controller, or
other logic.
Connecting the NCP1230 PFC_VCC output to a PFC
Controller chip is very straight forward, refer to the “Typical
Application Example” all that is generally required is a
small decoupling capacitor (0.1
mF).
Figure 29. Typical Application Example
1
8
2
3
4
7
6
5
High Voltage
MC33262/33260
1
8
2
3
4
7
6
5
NCP1230
+
GND
Vout
Rsense
GND
VCC Cap
PFC_VCC


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