NCP1230A Datasheet, PDF (1/21 Pages) ON Semiconductor – Low--Standby Power Soft Skip Mode Controller

NCP1230A
Low- Standby Power Soft
Skip Mode Controller
The NCP1230A represents a major leap towards achieving low
standby power in medium--to--high power Switched--Mode Power
Supplies such as notebook adapters, off--line battery chargers and
consumer electronics equipment. Housed in a compact 8--pin package
(SO--8 or PDIP--7), the NCP1230A contains all needed control
functionality to build a rugged and efficient power supply. The
NCP1230A is a current mode controller with internal ramp
compensation. Among the unique features offered by the NCP1230A
is an event management scheme that can disable the front--end PFC
circuit during standby, thus reducing the no load power consumption.
The NCP1230A itself goes into soft skipping at light loads while
limiting peak current (to 25% of nominal peak) so that no acoustic
noise is generated. The NCP1230A has a high--voltage startup circuit
that eliminates external components and reduces power consumption.
The NCP1230A also features an internal latching function that can
be used for OVP protection. This latch is triggered by pulling the CS
pin above 3.0 V and can only be reset by pulling V_CC to ground. True
overload protection, internal 2.5 ms soft--start, internal leading edge
blanking, internal frequency dithering for low EMI are some of the
other important features offered by the NCP1230A.
8
1
http://onsemi.com
MARKING
DIAGRAMS
SO--8 VHVIC
D SUFFIX
CASE 751
8
230Ay
ALYWy
G
1
8
1
PDIP--7 VHVIC
P SUFFIX
CASE 626B
1
1230Axx
AWL
YYWWG
Features
 Current--Mode Operation with Internal Ramp Compensation
 Internal High--Voltage Startup Current Source for Loss Less Startup
 Extremely Low No--Load Standby Power
 Soft Skip Mode at Low Peak Currents (Skip--Cycle)
 Direct Connection to PFC Controller for Improved No--Load Standby
Power
 Internal 2.5 ms Soft--Start
 Internal Leading Edge Blanking
 Short--Circuit Protection Independent of Auxiliary Level
 Internal Frequency Dithering for Improved EMI Signature
 +500 mA/--800 mA Peak Current Drive Capability
 Available in Three Frequency Options: 65 kHz, 100 kHz, and 133 kHz
 Direct Optocoupler Connection
 SPICE Models Available for TRANsient and AC Analysis
 Pb--Free Packages are Available
Typical Applications
 High Power AC--DC Adapters for Notebooks, etc.
 Offline Battery Chargers
 Set--Top Boxes Power Supplies, TV, Monitors, etc.
xx
= Device Code: 65, 100, 133
yy
= Device Code: 65, 100, 133
A
= Assembly Location
W, WW = Work Week
L
= Wafer Lot
Y, YY = Year
G
= Pb--Free Package
G
= Pb--Free Package
PIN CONNECTIONS
1
PFC Vcc
FB
CS
GND
8
HV
V_CC
DRV
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
 Semiconductor Components Industries, LLC, 2010
1
December, 2010 -- Rev. 7
Publication Order Number:
NCP1230A/D