NCP1271,NCP1271P100G

Part No.:
NCP1271,NCP1271P100G
Download:
Download
Description:
Soft-Skip Mode Standby PWM Controller with Adjustable Skip Level and External Latch
File Size:
239 K
Page:
21 Pages
Logo:
Maker:
ONSEMI [ ON SEMICONDUCTOR ]
PCB Prototype

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PCB Datasheet:1PCB Datasheet:1
NCP1271
Soft-Skipt Mode Standby
PWM Controller with
Adjustable Skip Level and
External Latch
The NCP1271 represents a new, pin to pin compatible, generation
of the successful 7−pin current mode NCP12XX product series. The
controller allows for excellent stand by power consumption by use of
its adjustable Soft−Skip mode and integrated high voltage startup
FET. This proprietary Soft−Skip also dramatically reduces the risk of
acoustic noise. This allows the use of inexpensive transformers and
capacitors in the clamping network. Internal frequency jittering,
ramp compensation, timer−based fault detection and a latch input
make this controller an excellent candidate for converters where
ruggedness and component cost are the key constraints.
Features
http://onsemi.com
MARKING
DIAGRAMS
8
SOIC−7
D SUFFIX
CASE 751U
1271x
ALYWG
G
1
Fixed−Frequency Current−Mode Operation with Ramp
PDIP−7 VHVIC
P SUFFIX
CASE 626B
8
1
x
1
1271Pxxx
AWL
YYWWG
Compensation and Skip Cycle in Standby Condition
Timer−Based Fault Protection for Improved Overload Detection
“Soft−Skip Mode” Technique for Optimal Noise Control in Standby
Internal High−Voltage Startup Current Source for Lossless Startup
"5%
Current Limit Accuracy over the Full Temperature Range
Adjustable Skip Level
Internal Latch for Easy Implementation of Overvoltage and
Overtemperature Protection
Frequency Jittering for Softened EMI Signature
+500 mA/−800 mA Peak Current Drive Capability
Sub−100 mW Standby Power can be Achieved
Pin−to−Pin Compatible with the Existing NCP120X Series
This is a Pb−Free Device
= A or B
A= 65 kHz
B= 100 kHz
xxx
= Device Code: 65, 100
A
= Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
G
or G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
Skip/latch
FB
CS
GND
1
2
3
4
(Top View)
6
5
8
HV
V
CC
Drv
Typical Applications
AC−DC Adapters for Notebooks, LCD Monitors
Offline Battery Chargers
Consumer Electronic Appliances STB, DVD, DVDR
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 19 of this data sheet.
*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, 2009
September, 2009
Rev. 6
1
Publication Order Number:
NCP1271/D