datasheet4u.com

900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




  ON Semiconductor Electronic Components Datasheet  

NCP1200A Datasheet

PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Low Standby Power

No Preview Available !

NCP1200A pdf
NCP1200A
PWM Current-Mode
Controller for Universal
Off-Line Supplies Featuring
Low Standby Power
Housed in SOIC8 or PDIP8 package, the NCP1200A enhances
the previous NCP1200 series by offering a reduced optocoupler
current together with an increased drive capability. Due to its novel
concept, the circuit allows the implementation of complete offline
ACDC adapters, battery charger or a SMPS where standby power is
a key parameter.
With an internal structure operating at a fixed 40 kHz, 60 kHz or
100 kHz, the controller supplies itself from the highvoltage rail,
avoiding the need of an auxiliary winding. This feature naturally eases
the designer task in battery charger applications. Finally,
currentmode control provides an excellent audiosusceptibility and
inherent pulsebypulse control.
When the current setpoint falls below a given value, e.g. the output
power demand diminishes, the IC automatically enters the socalled
skip cycle mode and provides excellent efficiency at light loads.
Because this occurs at a user adjustable low peak current, no acoustic
noise takes place.
The NCP1200A features an efficient protective circuitry which, in
presence of an overcurrent condition, disables the output pulses while
the device enters a safe burst mode, trying to restart. Once the default
has gone, the device autorecovers.
Features
No Auxiliary Winding Operation
AutoRecovery Internal Output ShortCircuit Protection
Extremely Low NoLoad Standby Power
CurrentMode Control with SkipCycle Capability
Internal Temperature Shutdown
Internal Leading Edge Blanking
250 mA Peak Current Capability
Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz
Direct Optocoupler Connection
SPICE Models Available for TRANsient and AC Analysis
Pin to Pin Compatible with NCP1200
PbFree Packages are Available
Typical Applications
ACDC Adapters for Portable Devices
Offline Battery Chargers
Auxiliary Power Supplies (USB, Appliances, TVs, etc.)
http://onsemi.com
MINIATURE PWM
CONTROLLER FOR HIGH
POWER ACDC WALL
ADAPTERS AND OFFLINE
BATTERY CHARGERS
8
1
8
1
SOIC8
D SUFFIX
CASE 751
MARKING
DIAGRAMS
8
200Ax
ALYW
G
1
PDIP8
P SUFFIX
CASE 626
8
1200APyy
AWL
YYWWG
1
x = 1, 4, or 6
yy = 40, 60, or 100
A = Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
G or G = PbFree Package
PIN CONNECTIONS
Adj 1
FB 2
CS 3
GND 4
8 HV
7 NC
6 VCC
5 Drv
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the
package dimensions section on page 14 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
January, 2011 Rev. 9
1
Publication Order Number:
NCP1200A/D


  ON Semiconductor Electronic Components Datasheet  

NCP1200A Datasheet

PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Low Standby Power

No Preview Available !

NCP1200A pdf
NCP1200A
EMI
FILTER
UNIVERSAL
INPUT
+
NCP1200A
1 Adj HV 8
2 FB
7
3 CS VCC 6
4 GND Drv 5
1N4007*
+
*Please refer to the application information section.
Figure 1. Typical Application Example
VOUT
+
PIN FUNCTION DESCRIPTION
Pin No. Pin Name
1 Adj
Function
Adjust the skipping peak current
2 FB Sets the peak current setpoint
3 CS
Current sense input
4 GND
The IC ground
5 Drv
Driving pulses
6 VCC
7 NC
Supplies the IC
8 HV Generates the VCC from the line
Pin Description
This pin lets you adjust the level at which the cycle skipping process takes
place. Shorting this pin to ground, permanently disables the skip cycle
feature.
By connecting an optocoupler to this pin, the peak current setpoint is
adjusted accordingly to the output power demand.
This pin senses the primary current and routes it to the internal comparator
via an L.E.B.
The driver’s output to an external MOSFET.
This pin is connected to an external bulk capacitor of typically 10 mF.
This unconnected pin ensures adequate creepage distance.
Connected to the highvoltage rail, this pin injects a constant current into
the VCC bulk capacitor.
http://onsemi.com
2


Part Number NCP1200A
Description PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Low Standby Power
Maker ON
Total Page 16 Pages
PDF Download
NCP1200A pdf
NCP1200A Datasheet PDF
[partsNo] view html
View PDF for Mobile








Similar Datasheet

1 NCP1200 PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies ON Semiconductor
ON Semiconductor
NCP1200 pdf
2 NCP1200A PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Low Standby Power ON
ON
NCP1200A pdf
3 NCP1200CH Universal Offline Power Supply Low Power Current Mode Pulse Width Modulation controller ON Semiconductor
ON Semiconductor
NCP1200CH pdf
4 NCP1200D Universal Offline Power Supply Low Power Current Mode Pulse Width Modulation controller ON Semiconductor
ON Semiconductor
NCP1200D pdf





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy