ncp1230a ON Semiconductor, ncp1230a Datasheet - Page 12

• Manufacturer Part Number: ncp1230a
• Description: Low?standby Power Soft Skip Mode Controller
• Manufacturer: ON Semiconductor

Introduction
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.
voltage source providing lossless startup, and eliminating
external startup circuitry. In addition, the NCP1230A has a
PFC_V
for a Power Factor Correction controller, or other logic. The
NCP1230A has an event management scheme which
High Voltage
The NCP1230A is a current mode controller which
The NCP1230A can be connected directly to a high
CC
output pin which provides the bias supply power
MC33262/33260
1
2
3
4
8
7
6
5
Figure 29. Typical Application Example
PFC_V
OPERATING DESCRIPTION
CC
http://onsemi.com
1
2
3
4
NCP1230A
12
8
7
6
5
disables the PFC_V
conditions.
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 NCP1230A diagram, an internal
Connecting the NCP1230A PFC_V
CC
V
CC
Cap
CC
output during standby, and overload
CC
signal is capable of delivering up
Rsense
CC
output to a PFC
Gnd
CC
+
) to Pin 1
Gnd
V
out