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參數資料
| 型號： | NCP4326DR2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 模擬信號調理 |
| 英文描述： | Secondary Controller for Multi−Output Quasi−Resonant Switchmode Power Supplies |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | LEAD FREE, SOIC-16 |
| 文件頁數： | 1/30頁 |
| 文件大小： | 432K |
| 代理商： | NCP4326DR2G |
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Semiconductor Components Industries, LLC, 2005
September, 2005 Rev. 1
1
Publication Order Number:
NCP4326/D
NCP4326
Secondary Controller for
MultiOutput
QuasiResonant
Switchmode Power
Supplies
This secondary controller significantly improves the overall
efficiency and crossregulation figures when used in a Switchmode
Power Supply. Compared to traditional regulation schemes, the
NCP4326 provides superior performance in crossregulation by
individually regulating outputs. Powered from a main winding, the
device actuates two independent switches that precisely adjust the
considered outputs to resistorselectable voltages. This controller also
integrates a precision reference voltage, which together with a
dedicated operational amplifier reduces the feedback loop elements to
the minimum. In the end three independent output voltages can be
controlled by a single device.
A skip cycle feature improves the stand by power in light load
condition. Finally, dedicated shutdown pins offer an easy mean to
disable the secondary outputs in applications where a low standby
power performance is key.
Features
0% to 100% Duty Cycle Range
Integrated Shunt Regulator for Optocoupler Control
Internal Voltage Reference (1.25 V, 1% @ 25
°
C)
2 Independent Power MOSFET Drivers
Enable/Disable for Each Driver
Independent SoftStarts on both Output Drivers
Independent Skip Cycle on both Output Drivers
Standby Pin
580 / 650 mA Peak Current Source/Sink Driver Capability
Synchronization Pin
5 V Undervoltage LockOut on Vcc
PbFree Package is Available
Applications
Consumer Electronics Applications:
DVD, Set Top Box, CDR, Game Console
Any MultiOutput Voltage QuasiResonant SMPS
http://onsemi.com
MARKING DIAGRAM
SOIC16
D SUFFIX
CASE 751B
NCP4326DG
AWLYWW
1
A
WL = Wafer Lot
Y
= Year
WW = Work Week
G
= PbFree Device
= Assembly Location
(Bottom View)
Device
Package
Shipping
ORDERING INFORMATION
NCP4326DR2
3000 Tape & Reel
SOIC16
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.
PIN CONNECTIONS
CP1
FB1
EN2
CP2
FB2
Ct
Sync
CPm
EN1
GND
Flux
DRV1
Vcc
DRV2
STBY
FBm
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NCP4326DR2G
3000 Tape & Reel
SOIC16
(PbFree)
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