NCP1360 Datasheet, PDF (1/29 Pages) ON Semiconductor – Low Power Offline Constant Current & Constant Voltage 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 universal−mains flyback
application. Thanks to a novel method this new controller saves the
secondary feedback circuitry (opto−coupler and TL431 reference)
while achieving excellent line and load regulation.
The NCP1360/65 operates in valley−lockout quasi−resonant peak
current mode control mode at nominal load to provide high efficiency.
When the secondary−side power starts diminishing, the switching
frequency naturally increases until a voltage−controlled oscillator
(VCO) takes the lead, synchronizing the MOSFET turn−on in a
drain−source 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 valley−switching
mode until a minimum is hit. This technique keeps the output in
regulation with the tiniest dummy load. Valley lockout during the first
four drain−source valleys prevents erratic discrete jumps and provides
good efficiency in lighter load situations.
SOIC−7
CASE 751U
MARKING
DIAGRAMS
8
XXXXX
ALYWX
G
1
TSOP−6
CASE 318G
1
xxxAYWG
G
1
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W, WW = Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
Features
• Primary−Side Feedback Eliminates Opto−coupler 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 Start−up Current (2.5 mA typ.) with NCP1360
• 560 V Startup Current Source
• Clamped Gate−drive Output for MOSFET
• No Frequency Clamp, 80 or 110 kHz Maximum
• CS & Vs/ZCD pin Short and Open Protection
Switching Frequency Options
• Quasi−Resonant Operation with Valley Switching
• Internal Temperature Shutdown
• Less than 10 mW No−Load Performance at High Line
Operation
• Fixed Peak Current & Deep Frequency Foldback @
with NCP1365 Version
• Less than 30 mW No−Load Performance at High Line
Light Load Operation.
• External Constant Voltage Feedback Adjustment
• Cycle by Cycle Peak Current Limit
• Build−In Soft−Start
• Over & Under Output Voltage Protection
• Cable Drop Compensation (None, 150 mV, 300 mV or
450 mV option)
with NCP1360 Version
• These are Pb−Free Devices
Typical Applications
• Low power ac−dc Adapters for Chargers.
• Ac−dc USB chargers for Cell Phones, Tablets and
Cameras
• Wide Operation V_{CC R}ange (up to 28 V)
© Semiconductor Components Industries, LLC, 2015
1
October, 2015 − Rev. 1
Publication Order Number:
NCP1360/D