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  ON Semiconductor Electronic Components Datasheet  

NCP1200P40 Datasheet

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

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NCP1200P40 pdf
NCP1200
PWM Current-Mode
Controller for Low-Power
Universal Off-Line Supplies
Housed in SOIC8 or PDIP8 package, the NCP1200 represents a
major leap toward ultracompact Switchmode Power Supplies. Due to
a novel concept, the circuit allows the implementation of a complete
offline battery charger or a standby SMPS with few external
components. Furthermore, an integrated output shortcircuit
protection lets the designer build an extremely lowcost ACDC wall
adapter associated with a simplified feedback scheme.
With an internal structure operating at a fixed 40 kHz, 60 kHz or
100 kHz, the controller drives low gatecharge switching devices like
an IGBT or a MOSFET thus requiring a very small operating power.
Due to currentmode control, the NCP1200 drastically simplifies the
design of reliable and cheap offline converters with extremely low
acoustic generation 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 skip cycle
mode and provides excellent efficiency at light loads. Because this
occurs at low peak current, no acoustic noise takes place.
Finally, the IC is selfsupplied from the DC rail, eliminating the
need of an auxiliary winding. This feature ensures operation in
presence of low output voltage or shorts.
Features
No Auxiliary Winding Operation
Internal Output ShortCircuit Protection
Extremely Low NoLoad Standby Power
CurrentMode with SkipCycle Capability
Internal Leading Edge Blanking
250 mA Peak Current Source/Sink Capability
Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz
Direct Optocoupler Connection
Builtin Frequency Jittering for Lower EMI
SPICE Models Available for TRANsient and AC Analysis
Internal Temperature Shutdown
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
ACDC Adapters
Offline Battery Chargers
Auxiliary/Ancillary Power Supplies (USB, Appliances, TVs, etc.)
www.onsemi.com
8
1
8
1
SOIC8
D SUFFIX
CASE 751
PDIP8
P SUFFIX
CASE 626
MARKING
DIAGRAMS
8
200Dy
ALYW
G
1
8
1200Pxxx
AWL
YYWWG
1
xxx = Device Code: 40, 60 or 100
y = Device Code:
4 for 40
6 for 60
1 for 100
A = Assembly Location
L = Wafer Lot
Y, YY = Year
W, WW = Work Week
G, 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 on page 14 of
this data sheet.
© Semiconductor Components Industries, LLC, 2015
April, 2015 Rev. 19
1
Publication Order Number:
NCP1200/D


  ON Semiconductor Electronic Components Datasheet  

NCP1200P40 Datasheet

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

No Preview Available !

NCP1200P40 pdf
NCP1200
EMI
Filter
Universal Input
C3
10 mF
400 V
+
1 Adj
2 FB
HV 8
NC 7
3 CS VCC 6
4 GND Drv 5
*
D2
1N5819
M1
MTD1N60E
C5
10 mF
+
Rsense
*Please refer to the application information section
Figure 1. Typical Application
6.5 V @ 600 mA
+ C2
470 mF/10 V
Rf
470
D8
5 V1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPIN FUNCTION DESCRIPTION
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPinNo. PinName
Function
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ1 Adj Adjust the Skipping Peak Current
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ2 FB Sets the Peak Current Setpoint
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ3 CS CurrentSenseInput
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ4
GND
The IC Ground
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ5 Drv DrivingPulses
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ6 VCC SuppliestheIC
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ7 NC NoConnection
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ8 HV GeneratestheVCCfromtheLine
Description
This pin lets you adjust the level at which the cycle skipping process takes
place.
By connecting an Optocoupler to this pin, the peak current setpoint is adjus-
ted 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.
www.onsemi.com
2


Part Number NCP1200P40
Description PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies
Maker ON Semiconductor
Total Page 16 Pages
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