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NCP1200A/D

更新时间: 2024-09-14 22:06:59
品牌 Logo 应用领域
安森美 - ONSEMI 控制器
页数 文件大小 规格书
16页 137K
描述
PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Low Standby Power

NCP1200A/D 数据手册

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NCP1200A  
PWM Current−Mode  
Controller for Universal  
Off−Line Supplies Featuring  
Low Standby Power  
Housed in SOIC−8 or PDIP−8 package, the NCP1200A enhances  
the previous NCP1200 series by offering a reduced optocoupler  
current together with an increased drive capability. Due to its novel  
concept, the circuit allows the implementation of complete off−line  
AC−DC adapters, battery charger or a SMPS where standby power is a  
key parameter.  
With an internal structure operating at a fixed 40 kHz, 60 kHz or  
100 kHz, the controller supplies itself from the high−voltage rail,  
avoiding the need of an auxiliary winding. This feature naturally eases  
the designer task in battery charger applications. Finally,  
current−mode control provides an excellent audio−susceptibility and  
inherent pulse−by−pulse control.  
When the current setpoint falls below a given value, e.g. the output  
power demand diminishes, the IC automatically enters the so−called  
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.  
The NCP1200A features an efficient protective circuitry which, in  
presence of an overcurrent condition, disables the output pulses while  
the device enters a safe burst mode, trying to restart. Once the default  
has gone, the device auto−recovers.  
http://onsemi.com  
MINIATURE PWM  
CONTROLLER FOR HIGH  
POWER AC−DC WALL  
ADAPTERS AND OFFLINE  
BATTERY CHARGERS  
MARKING  
DIAGRAMS  
8
SOIC−8  
D SUFFIX  
CASE 751  
200Ay  
ALYW  
8
1
1
8
1200APxxx  
AWL  
PDIP−8  
P SUFFIX  
CASE 626  
8
YYWW  
Features  
1
1
Pb−Free Packages are Available  
No Auxiliary Winding Operation  
xxx  
y
= Specific Device Code  
(40, 60 or 100)  
= Specific Device Code  
(4 for 40, 6 for 60, 1 for 100)  
= Assembly Location  
Auto−Recovery Internal Output Short−Circuit Protection  
Extremely Low No−Load Standby Power  
Current−Mode Control with Skip−Cycle Capability  
Internal Temperature Shutdown  
Internal Leading Edge Blanking  
250 mA Peak Current Capability  
A
WL, L = Wafer Lot  
Y, YY = Year  
W, WW = Work Week  
Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz  
Direct Optocoupler Connection  
PIN CONNECTIONS  
SPICE Models Available for TRANsient and AC Analysis  
Pin to Pin Compatible with NCP1200  
Adj  
FB  
HV  
NC  
V
1
2
3
4
8
7
6
5
Typical Applications  
CS  
CC  
AC−DC Adapters for Portable Devices  
Offline Battery Chargers  
GND  
Drv  
Auxiliary Power Supplies (USB, Appliances, TVs, etc.)  
(Top View)  
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 13 of this data sheet.  
Semiconductor Components Industries, LLC, 2004  
1
Publication Order Number:  
October, 2004− Rev. 5  
NCP1200A/D  

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