ncp1231d65r2g ON Semiconductor, ncp1231d65r2g Datasheet - Page 12

• Manufacturer Part Number: ncp1231d65r2g
• Description: Lowstandby Power High Performance Pwm Controller
• 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 offïline application, such as notebook adapters,
battery chargers, setïboxes, TV, and computer monitors.
the controller to be connected directly to a high voltage
source through a resistor, providing low loss startup, and
reducing external circuitry. In addition, the NCP1231 has a
PFC_V
for a Power Factor Correction controller, or other logic. The
NCP1231 has an event management scheme which disables
The NCP1231 is a current mode controller which provides
The NCP1231 has a low startup current (30 mA) allowing
High Voltage
CC
output pin which provides the bias supply power
MC33262/33260/etc.
1
2
3
4
8
7
6
5
Figure 30. Typical Application Example
OPERATING DESCRIPTION
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NCP1231
12
1
2
3
4
NCP1231
the PFC_V
conditions.
PFC_V
diagram, an internal low impedance switch SW1 routes
Pin 6 (V
under nominal load conditions. The PFC_V
capable of delivering up 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” (Figure 30) all that is generally
required is a small decoupling capacitor (0.1 mF) near the
PFC controller.
As shown on the internal NCP1231 internal block
Connecting the NCP1231 PFC_V
CC
8
7
6
5
CC
) to Pin 1 when the power supply is operating
CC
output during standby, and overload
Rstartup
CC
output to a PFC
CC
signal is