NCP1230 ON Semiconductor, NCP1230 Datasheet - Page 11

• Manufacturer Part Number: NCP1230
• Description: Fixed Frequency Controller Featuring Pfc Go To Standby Function
• Manufacturer: ON Semiconductor

Introduction
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.
source providing lossless startup, and eliminating external
startup circuitry. In addition, the NCP1230 has a PFC_V
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_V
High Voltage
The NCP1230 is a current mode controller which provides
The NCP1230 can be connected directly to a high voltage
CC
output during standby, and overload conditions.
MC33262/33260
1
2
3
4
8
7
6
5
Figure 29. Typical Application Example
PFC_V
OPERATING DESCRIPTION
CC
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1
2
3
4
NCP1230
CC
11
8
7
6
5
PFC_V
low impedance switch SW1 routes Pin 6 (V
when the power supply is operating under nominal load
conditions. The PFC_V
to 35 mA of continuous current for a PFC Controller, or
other logic.
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).
As shown on the internal NCP1230 diagram, an internal
Connecting the NCP1230 PFC_V
CC
V
CC
Cap
CC
signal is capable of delivering up
Rsense
CC
output to a PFC
GND
CC
+
) to Pin 1
GND
V
out