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NCP1280DR2 Datasheet

  • NCP1280DR2

  • Active Clamp Voltage Mode PWM Controller for Off-Line Applic...

  • 18頁

  • ONSEMI

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NCP1280
Active Clamp Voltage Mode
PWM Controller for Off鈭扡ine
Applications
The NCP1280 provides a highly integrated solution for off鈭抣ine
power supplies requiring high鈭抏fficiency and low parts count. This
voltage mode controller provides control outputs for driving a forward
converter primary MOSFET and an auxiliary MOSFET for active
clamp circuit. The second output with its programmable delay can also
be used for driving a synchronous rectifier on the secondary or for
asymmetric half bridge circuits. Incorporation of high voltage start鈭抲p
circuitry (with 700 V capability) reduces parts count and system
power dissipation. Additional features such as line UV/OV protection,
soft start, single resistor programmable (high) frequency oscillator,
line voltage feedforward, dual mode overcurrent protection and
maximum duty cycle control, allow converter optimization at minimal
cost. Compared to a traditional forward converter, an NCP1280 based
converter can offer significant efficiency improvements and system
cost savings.
Features
http://onsemi.com
MARKING
DIAGRAM
16
SO鈭?6
D SUFFIX
CASE 751B
1
1
NCP1280 = Device Code
A
= Assembly Location
WL
= Wafer Lot
Y
= Year
WW
= Work Week
NCP1280
AWLYWW
16
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Internal High Voltage Start鈭扷p Regulator (25 V to 700 V)
Dual Control Outputs with Adjustable Overlap Delay
Programmable Maximum Duty Cycle Control
Single Resistor Oscillator Frequency Setting
Fast Line Feedforward
Line Under/Overvoltage Lockout
Dual Mode Overcurrent Protection
Programmable Soft Start
Precision 5.0 V Reference
Off鈭扡ine Power Converters in 100鈭?00 W Range
Desktop Power Supplies (High鈭扙nd)
Industrial Power Supplies
Plasma/LCD TV Front鈭扙nd
TX1
+
V
in
鈭?/div>
V
in
FF
NCP1280
UV/OV
t
D
Opto
OUT1
OUT2
Driver
(100 V 鈭?425 V)
Feedforward
Start鈭抲p
C
clamp
SR
Drive
PIN CONNECTIONS
1
V
in
NC
UV/OV
FF
CS
C
SKIP
R
T
DC
MAX
16
V
AUX
OUT1
GND
OUT2
t
D
V
REF
V
EA
SS
ORDERING INFORMATION
Device
NCP1280DR2
Package
SO鈭?6
Shipping鈥?/div>
2500/Tape & Reel
Typical Applications
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.
L
out
+
C
out
V
out
(3.3 V)
鈭?/div>
Overlap
Delay
Error
Amplifier
Figure 1. Forward Converter for Off鈭抣ine Applications Using PFC Inputs
漏
Semiconductor Components Industries, LLC, 2004
1
April, 2004 鈭?Rev. 1
Publication Order Number
NCP1280/D

NCP1280DR2 產(chǎn)品屬性

  • 2,500

  • 集成電路 (IC)

  • PMIC - AC-DC 轉(zhuǎn)換器，離線開關(guān)

  • -

  • 隔離

  • 140kHz ~ 320kHz

  • 7 V ~ 25 V

  • -

  • -

  • -40°C ~ 150°C

  • 16-SOIC（0.154"，3.90mm 寬）

  • 16-SOIC N

  • 帶卷 (TR)

NCP1280DR2相關(guān)型號PDF文件下載

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