|
NCP1360_16 Datasheet, PDF (1/29 Pages) ON Semiconductor – Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller | |||
|
NCP1360, NCP1365
Low Power Offline Constant
Current & Constant Voltage
Primary Side PWM
Current-Mode Controller
with/without High Voltage
www.onsemi.com
Startup Current Source
The NCP1360/65 offers a new solution targeting output power
levels from a few watts up to 20 W in a universalâmains flyback
application. Thanks to a novel method this new controller saves the
secondary feedback circuitry (optoâcoupler and TL431 reference)
while achieving excellent line and load regulation.
The NCP1360/65 operates in valleyâlockout quasiâresonant peak
current mode control mode at nominal load to provide high efficiency.
When the secondaryâside power starts diminishing, the switching
frequency naturally increases until a voltageâcontrolled oscillator
(VCO) takes the lead, synchronizing the MOSFET turnâon in a
drainâsource voltage valley. The frequency is thus reduced by
stepping into successive valleys until the number 4 is reached. Beyond
this point, the frequency is linearly decreased in valleyâswitching
mode until a minimum is hit. This technique keeps the output in
regulation with the tiniest dummy load. Valley lockout during the first
four drainâsource valleys prevents erratic discrete jumps and provides
good efficiency in lighter load situations.
SOICâ7
CASE 751U
MARKING
DIAGRAMS
8
XXXXX
ALYWX
G
1
TSOPâ6
CASE 318G
1
xxxAYWG
G
1
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W, WW = Work Week
G
= PbâFree Package
(Note: Microdot may be in either location)
Features
⢠PrimaryâSide Feedback Eliminates Optoâcoupler and TL431
ORDERING INFORMATION
See detailed ordering and shipping information on page 27 of
this data sheet.
Reference
⢠±5% Voltage Regulation
⢠±10% Current Regulation
⢠Low Startâup Current (2.5 mA typ.) with NCP1360
⢠560 V Startup Current Source
⢠Clamped Gateâdrive Output for MOSFET
⢠No Frequency Clamp, 80 or 110 kHz Maximum
⢠CS & Vs/ZCD pin Short and Open Protection
Switching Frequency Options
⢠QuasiâResonant Operation with Valley Switching
⢠Internal Temperature Shutdown
⢠Less than 10 mW NoâLoad Performance at High Line
Operation
⢠Fixed Peak Current & Deep Frequency Foldback @
with NCP1365 Version
⢠Less than 30 mW NoâLoad Performance at High Line
Light Load Operation.
⢠External Constant Voltage Feedback Adjustment
⢠Cycle by Cycle Peak Current Limit
⢠BuildâIn SoftâStart
⢠Over & Under Output Voltage Protection
⢠Cable Drop Compensation (None, 150 mV, 300 mV or
450 mV option)
with NCP1360 Version
⢠These are PbâFree Devices
Typical Applications
⢠Low power acâdc Adapters for Chargers.
⢠Acâdc USB chargers for Cell Phones, Tablets and
Cameras
⢠Wide Operation VCC Range (up to 28 V)
© Semiconductor Components Industries, LLC, 2016
1
June, 2016 â Rev. 3
Publication Order Number:
NCP1360/D
|
▷ |