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ON Semiconductor - (NCP1000 - NCP1002) Integrated Off-Line Switching Regulator

Numéro de référence NCP1001
Description (NCP1000 - NCP1002) Integrated Off-Line Switching Regulator
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NCP1001 fiche technique
NCP1000, NCP1001,
NCP1002
Integrated Off−Line
Switching Regulator
The NCP1000 through NCP1002 series of integrated switching
regulators, combine a fixed frequency PWM controller with an
integrated high voltage power switch circuit. This chip allows for
simple design and minimal parts count for very low cost applications
which utilize an ac input. This chip is designed to power a single ended
topology, typically a discontinuous mode flyback, with secondary side
sensing.
The internal high voltage switch circuit and start−up circuit can
function in continuous operation over a wide range of inputs, from 85
Vac to 265 Vac, and thus can be used in any existing power system in
the world. Though inexpensive, these devices include a number of
features such as undervoltage lockout, over−temperature protection,
bandgap reference and leading edge blanking that make them an
excellent value.
Features
Highly Integrated Solution
Operates Over Universal Input Voltage Range (85 Vac to 265 Vac)
On−board 700 Volt Power Switch Circuit
Minimal External Parts Required
Input Undervoltage Lockout with Hysteresis
Very Low Standby Current
No Minimum Load Requirement
Opto Fail−safe Shutdown Circuit
Typical Applications
Cell Phone Chargers
Wall Adapters
On−board AC−DC Converters
VCC START−UP
INTERNAL BIAS
UVLO &
OPTO FAIL−SAFE
START−UP
CIRCUIT
FEEDBACK
INPUT
GND
+
PWM
PWM CONTROL
& POWER
SWITCH CIRCUIT
COMPARATOR
POWER
SWITCH
CIRCUIT
OSCILLATOR
http://onsemi.com
8
DIP−8
NCP100xP
8
P SUFFIX
AWL
CASE 626
YYWW
11
Pin: 1.
2.
3, 6−8
4.
5.
VCC
Feedback Input
Ground
Startup
Power Switch Circuit
x = Device Number 0, 1, or 2
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
ORDERING INFORMATION*
Device
Package
Shipping
Ipk Ron
Typ Max
(A) (W)
NCP1000P DIP−8 50 Units/Rail 0.5 18
NCP1001P DIP−8 50 Units/Rail 1.0 9
NCP1002P DIP−8 50 Units/Rail 1.5 6
*Consult factory for additional optocoupler fail−safe
latching, frequency, and current limit options.
Figure 1. Simplified Block Diagram
© Semiconductor Components Industries, LLC, 2003
December, 2003 − Rev. 7
1
Publication Order Number:
NCP1000/D

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