NCP1910A65DWR2G Datasheet, PDF (1/37 Pages) ON Semiconductor – High Performance Combo Controller for ATX Power

NCP1910
High Performance Combo
Controller for ATX Power
Supplies
Housed in a SO−24WB package, the NCP1910 combines a
state−of−the−art circuitry aimed to powering next generation of ATX
or flat TVs converters. With a 65 kHz Continuous Conduction Mode
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Power Factor Controller and a LLC controller hosting a high−voltage
driver, the NCP1910 is ready to power 85+ types of offline power
supplies. To satisfy stringent efficiency considerations, the PFC circuit
implements an adjustable frequency fold back to reduce switching
SO−24WB Less Pin 21
DW SUFFIX
CASE 752AB
losses as the load is going light. To cope with all the signal sequencing
required by the ATX and flat TVs specifications, the controller
includes several dedicated pins enabling handshake between the
MARKING DIAGRAM
secondary and the primary sides. These signals include a power−good
line but also a control pin which turns the controller on and off via an
opto coupler. Safety−wise, a second OVP input offers the necessary
redundancy in case the main feedback network would drift away.
NCP1910XXX
AWLYYWWG
Finally, a fast fault input immediately reacts in presence of an over
current condition by triggering an auto−recovery soft−start sequence.
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Features
• Fixed−Frequency 65 kHz CCM Power Factor Controller
• Average Current−Mode Control for Low Line Distortion
XXXXX = Specific Device Code
A
= Assembly Location
WL = Wafer Lot
YY
= Year
WW = Work Week
G
= Pb−Free Package
• Dynamic Response Enhancer Reduces Bulk Undershoot
• Independent Over Voltage Protection Sensing Pin with Latch−off
Capability
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 36 of this data sheet.
• Adjustable Frequency Fold Back Improves Light Load Efficiency
• Adjustable Line Brown−out Protection with 50 ms
• on/off Control Pin for Secondary−Based Remote
Delay to Help Meeting Hold−up Time Specifications
• Programmable Over current Threshold Leads to an
Control
• On−Board 5 V Reference Voltage for Precise
Optimized Sensing Resistor
• ±1 A peak Current Drive Capability
• LLC Controller Operates from 25 kHz to 500 kHz
Thresholds/Hysteresis Adjustments
• Power Good Output Management Signal
• A Version with Dual Ground Pinout (No Skip),
• On Board 600 V High−Voltage Drivers
• 1 A/0.5 A Sink/Source Capability
• Minimum Frequency Precision Down to ±3% Over
Temperature Range
• Internally Fixed Dead−Time Value of 300 ns
• Adjustable Soft−Start Sequence
• Fast Fault Input with Soft−Start Trigger for Immediate
Auto−Recovery Protection
B Version with Single Ground and Skip Operation for
the LLC Controller
• 20 V Operation
• These are Pb−Free Devices
Typical Applications
• Multi Output ATX Power Supplies (A version)
• Flat TVs Power Supplies (B version)
© Semiconductor Components Industries, LLC, 2012
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December, 2012 − Rev. 1
Publication Order Number:
NCP1910/D