NCP1000_06 Datasheet, PDF (1/14 Pages) ON Semiconductor – Integrated Off−Line Switching Regulator

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 startup 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 V 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
• Pb−Free Packages are Available*
Typical Applications
• Cell Phone Chargers
• Wall Adapters
• On−board AC−DC Converters
V_CC
STARTUP
INTERNAL BIAS
UVLO &
OPTO FAIL−SAFE
STARTUP
CIRCUIT
FEEDBACK
INPUT
GND
+
−
PWM
PWM CONTROL
& POWER
SWITCH CIRCUIT
COMPARATOR
POWER
SWITCH
CIRCUIT
OSCILLATOR
Figure 1. Simplified Block Diagram
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2006
1
February, 2006 − Rev. 8
http://onsemi.com
8
1
PDIP−8
P SUFFIX
CASE 626
Pin: 1.
2.
V_CC
Feedback Input
3, 6−8 Ground
4. Startup
5. Power Switch Circuit
MARKING DIAGRAM
8
NCP100xP
AWL
YYWWG
1
x = Device Number 0, 1, or 2
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
ORDERING INFORMATION*
Device
Package
Shipping
Ipk Ron
Typ Max
(A) (W)
NCP1000P PDIP−8 50 Units/Rail 0.5 18
NCP1000PG PDIP−8 50 Units/Rail 0.5 18
(Pb−Free)
NCP1001P PDIP−8 50 Units/Rail 1.0 9
NCP1001PG PDIP−8 50 Units/Rail 1.0 9
(Pb−Free)
NCP1002P PDIP−8 50 Units/Rail 1.5 6
NCP1002PG PDIP−8 50 Units/Rail 1.5 6
(Pb−Free)
*Consult factory for additional optocoupler fail−safe
latching, frequency, and current limit options.
Publication Order Number:
NCP1000/D