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參數(shù)資料
| 型號(hào)： | NCP1225 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Low Standby Power SMPS Controller |
| 中文描述： | 低待機(jī)功耗開關(guān)電源控制器 |
| 文件頁(yè)數(shù)： | 1/6頁(yè) |
| 文件大?。?/td> | 44K |
| 代理商： | NCP1225 |
Semiconductor Components Industries, LLC, 2003
November, 2003 Rev. P0
1
Publication Order Number:
NCP1225/D
NCP1225
Product Preview
Low Standby Power
SMPS Controller
NCP1225 is a low standby power SwitchMode Power Supply,
SMPS controller IC specially designed for low power ACDC
adapter applications. The device operates in Discontinuous
Conduction Mode (DCM) with Pulse Frequency Modulation (PFM)
control scheme. PFM operation can provide high operating
efficiency even at light loading conditions and the device itself takes
extremely low operating current. With careful circuit design, low
standby power down to 300 mW can be achieved for universal line
input low power adapters. This specific feature can help the end
products to comply with immediate and future international power
saving regulations easily.
An innovative feedback compensation scheme is integrated in
NCP1225 to eliminate the expensive optocoupler in the feedback
path. By only using simple auxiliary winding feedback, the regulator
still can achieve good output voltage regulation usually not possible
with common SMPS controller ICs without optocoupler. For even
better regulation applications, optocoupler feedback can still be used
in place. Additionally, valueadded features as overvoltage
protection, undervoltage lockout and overcurrent protection
functions are also included. This controller is an ideal solution for
low power adapters and mobile phone chargers. With all valuable
features, this device is available in the tiny TSOP5 package.
Features
Current Mode Operation
CycleByCycle Current Limiting
High Efficiency Pulse Frequency Modulation (PFM) Control
Low Device Operating Current, 0.5 mA Typical
No Optocoupler Feedback Control
Extremely Low Standby Power
Internal Leading Edge Blanking
Input Undervoltage Lockout Protection
Output Overvoltage Protection
Optional Optocoupler Feedback
Micro Miniature TSOP5 Package
Typical Applications
Low Power Wall Mount Adapters
Mobile Phone Adapter Chargers
TV/Computer Auxiliary Power Supply
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
TSOP5
SN SUFFIX
CASE 483
PIN CONNECTIONS
Device
Package
Shipping
ORDERING INFORMATION
TBD
TSOP5
TBD
http://onsemi.com
TBD = Device Code
M
= Date Code
MARKING
DIAGRAM
1
5
1
5
TBD
M
1
3
CS
V
CC
2
GND
VDRIVE
4
GATE
5
(Top View)
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