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NCP1337 fiches techniques PDF

ON Semiconductor - PWM Current Mode Controller

Numéro de référence NCP1337
Description PWM Current Mode Controller
Fabricant ON Semiconductor 
Logo ON Semiconductor 





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NCP1337 fiche technique
NCP1337
PWM Current-Mode
Controller for Free Running
Quasi-Resonant Operation
The NCP1337 combines a true current mode modulator and
a demagnetization detector which ensures full Borderline/Critical
Conduction Mode in any load/line conditions together with
minimum drain voltage switching (Quasi−Resonant operation).
The transformer core reset detection is done internally, without using
any external signal, due to the Soxyless concept. The frequency is
internally limited to 130 kHz, preventing the controller to operate
above the 150 kHz CISPR−22 EMI starting limit.
By monitoring the feedback pin activity, the controller enters skip
mode as soon as the power demand falls below a predetermined
level. As each restart is softened by an internal Soft−Skipt, and as
the frequency cannot go below 25 kHz, no audible noise can be
heard.
The NCP1337 also features an efficient protective circuitry which,
in presence of an overcurrent condition, disables the output pulses
and enters a safe burst mode, trying to restart. Once the default has
gone, the device auto−recovers. Also included is a bulk voltage
monitoring function (known as brown−out protection), an adjustable
overpower compensation, and a VCC OVP. The controller
immediately restarts after any of these conditions, unless the fault
timer has timed out. Finally, an internal 4.0 ms soft−start eliminates
the traditional startup stress.
Features
Free−Running Borderline/Critical Mode Quasi−Resonant Operation
Current−Mode
Soft−Skip Mode with Minimum Switching Frequency for Standby
Auto−Recovery Short−Circuit Protection Independent of Auxiliary
Voltage
Overvoltage Protection
Brown−Out Protection
Two Externally Triggerable Fault Comparators (one for a disable
function, and the other for a permanent latch)
Internal 4.0 ms Soft−Start
500 mA Peak Current Drive Sink Capability
130 kHz Max Frequency
Internal Leading Edge Blanking
Internal Temperature Shutdown
Direct Optocoupler Connection
Dynamic Self−Supply with Levels of 12 V (On) and 10 V (Off)
SPICE Models Available for TRANsient and AC Analysis
These are Pb−Free Devices
Typical Applications
AC−DC Adapters for Notebooks, etc.
Offline Battery Chargers
Consumer Electronics (DVD Players, Set−Top Boxes, TVs, etc.)
Auxiliary Power Supplies (USB, Appliances, TVs, etc.)
www.onsemi.com
PDIP−7
P SUFFIX
CASE 626B
MARKING
DIAGRAM
7
NCP1337P
AWL
YYWWG
1
SOIC−7
D SUFFIX
CASE 751U
8
P1337
ALYW G
G
1
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G, G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
1
BO
2
FB
3
CS
4
GND
8
HV
6
VCC
5
DRV
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
NCP1337PG
PDIP−7
(Pb−Free)
50 Units/Rail
NCP1337DR2G
SOIC−7 2500 Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2014
December, 2014 − Rev. 6
1
Publication Order Number:
NCP1337/D

PagesPages 15
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