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NCP1239D Datasheet

  • NCP1239D

  • Low-Standby High Performance PWM Controller

  • 36頁

  • ETC

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NCP1239
Low鈭扴tandby High
Performance PWM Controller
Housed in SO鈭?6 the NCP1239 represents a major leap toward
ultra鈭抍ompact Switch Mode Power Supplies specifically tailored for
medium to high power off鈭抣ine applications, e.g. notebook adapters.
The NCP1239 offers everything needed to build a rugged and efficient
power supply, including a dedicated event management to drive a
Power Factor Correction front鈭抏nd circuitry. The circuit disables the
front鈭抏nd PFC stage while still in fault or standby conditions by
interrupting the PFC controller powering for improved no鈭抣oad
consumption figures. As soon as normal operating mode recovers, the
NCP1239 feeds back the PFC that wakes鈭抲p.
When power demand is low, the IC automatically enters the
so鈭抍alled skip cycle mode and provides excellent efficiency at light
loads. Because this occurs at a user adjustable low peak current, no
acoustic noise takes place.
Features
http://onsemi.com
MARKING
DIAGRAM
16
SO鈭?6
FD SUFFIX
CASE 751B
1
1
NCP1239 = Device Code
A
= Assembly Location
WL
= Wafer Lot
Y
= Year
WW
= Work Week
NCP1239FD
AWLYWW
16
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鈥?/div>
鈥?/div>
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Current鈭扢ode Operation with Internal Ramp Compensation
Internal High鈭扸oltage Current Source for loss鈭抣ess Start鈭抲p
Adjustable Skip鈭扖ycle Capability
Selectable Soft鈭扴tart Period
Internal Frequency Dithering for Improved EMI Signature
Go鈭抰o鈭扴tandby Signal for PFC Front鈭扴tage
Large Vcc Operation from 12.2 V to 25 V
500 mV Over鈭扖urrent Limit
鹵5%
500 mA/鈭?00 mA Peak Current Capability
5 V / 10 mA Pinned鈭抩ut Reference Voltage
Adjustable Switching Frequency up to 250 kHz.
Over鈭扡oad Protection Independent of the Auxiliary Vcc
Adjustable Over鈭扨ower Compensation
PIN CONNECTIONS
1
GTS
REF5V
Fault Detect
Rt
Brown鈭抩ut
SS / Timer
Skip Adjust
FB
16
HV
NC
NC
Vcc
Drv
Gnd
CS
Over Power
Limit
ORDERING INFORMATION
Device
NCP1239FDR2
Package
SO鈭?6
Shipping鈥?/div>
2500/Tape & Reel
Typical Applications
鈥?/div>
High Power AC/DC Adapters for Notebooks etc.
鈥?/div>
Offline Battery Chargers
鈥?/div>
Set鈭扵op Boxes Power Supplies, TV, Monitors etc.
鈥燜or information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
漏
Semiconductor Components Industries, LLC, 2004
1
February, 2004 鈭?Rev. 0
Publication Order Number
NCP1239/D

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  • 英文版
    Sub 1.0 V Precision Adjustable Shunt Regulator
    ONSEMI
  • 英文版
    Sub 1.0 V Precision Adjustable Shunt Regulator
    ONSEMI [ON...
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby-Power Offl...
    ON SEMICONDUCTOR
  • 英文版
    Integrated Off-Line Switching Regulator
    ONSEMI
  • 英文版
    Integrated Off-Line Switching Regulator
    ONSEMI [ON...
  • 英文版
    Integrated Off-Line Switching Regulator
    ONSEMI
  • 英文版
    Integrated Off-Line Switching Regulator
    ONSEMI [ON...
  • 英文版
    Integrated Off-Line Switching Regulator
    ONSEMI
  • 英文版
    Integrated Off-Line Switching Regulator
    ONSEMI [ON...
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby- Power Off...
    ONSEMI
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby- Power Off...
    ONSEMI [ON...
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby- Power Off...
    ONSEMI
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby- Power Off...
    ONSEMI [ON...
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby- Power Off...
    ONSEMI
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby- Power Off...
    ONSEMI [ON...
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby- Power Off...
    ONSEMI
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby- Power Off...
    ONSEMI [ON...
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby- Power Off...
    ONSEMI
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby- Power Off...
    ONSEMI [ON...
  • 英文版
    Self-Supplied Monolithic Switcher for Low Standby- Power Off...
    ONSEMI [ON Semi...

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