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參數資料
| 型號： | NCP1282BDR2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Performance Active Clamp/Reset PWM Controller Featuring 500 V Startup |
| 中文描述： | 2.5 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | LEAD FREE, SOP-16 |
| 文件頁數： | 1/23頁 |
| 文件大?。?/td> | 287K |
| 代理商： | NCP1282BDR2G |
Semiconductor Components Industries, LLC, 2006
December, 2006
Rev. 0
1
Publication Order Number:
NCP1282/D
NCP1282
High Performance Active
Clamp/Reset PWM Controller
Featuring 500 V Startup
The NCP1282 is a voltage mode controller designed for ac
dc or
dc
dc converters requiring high
efficiency and low parts count. This
controller incorporates two in phase outputs with an overlap delay to
prevent simultaneous conduction and facilitates soft switching. The
main output is designed for driving a forward converter primary
MOSFET. The secondary output is designed for driving an active
clamp circuit MOSFET, a synchronous rectifier on the secondary
side, or an asymmetric half bridge circuit.
The NCP1282 reduces component count and system size by
incorporating high accuracy on critical specifications such as
maximum duty cycle limit, undervoltage detector and overcurrent
threshold. Two distinctive features of the NCP1282 are soft
stop and
a cycle skip current limit with a time threshold. Soft
stop circuitry
powers down the converter in a controlled manner if a severe fault is
detected. The cycle skip detector enables a soft
stop sequence if a
continuous overcurrent condition is present.
Additional features found in the NCP1282 include line feed
forward, frequency synchronization up to 1.0 MHz, cycle
by
cycle
current limit with leading edge blanking (LEB), independent under
and overvoltage detectors, adjustable output overlap delay,
programmable maximum duty cycle, internal startup circuit and
soft
start.
Features
Dual Control Outputs with Adjustable Overlap Delay
>2.0 A Output Drive Capability
Soft
Stop Powers Down Converter in a Controlled
Manner
Cycle
by
Cycle Current Limit
Cycle Skip Initiated if Continuous Current Limit
Condition Exists
Voltage Mode Operation with Input Voltage
Feedforward
Fixed Frequency Operation up to 1.0 MHz
Bidirectional Frequency Synchronization
Independent Line Undervoltage and Overvoltage
Detectors
Minimum Operating Voltage of 8.5 V Ensures Enough
Voltage is Available for Driving High Voltage MOSFETs
Accurate Programmable Maximum Duty Cycle Limit
Programmable Maximum Volt
Second Product
Programmable Soft
Start
Internal 500 V Startup Circuit
Precision 5.0 V Reference
This is a Pb
Free Device*
Typical Applications
High Power Consumer Electronics
High Power AC
DC Converters
High Power DC
DC Converters
ATX Power Supplies
*For additional information on our Pb
Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques Reference
Manual, SOLDERRM/D.
A
WL, L
Y
WW, W = Work Week
G
= Pb
Free Package
= Assembly Location
= Wafer Lot
= Year
MARKING
DIAGRAM
http://onsemi.com
SO
16
D SUFFIX
CASE 751B
NCP1282BG
AWLYWW
Device
Package
Shipping
ORDERING INFORMATION
NCP1282BDR2G
SO
16
(Pb
Free)
2500 / Tape & Reel
For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
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