Datasheet > 1203P60

1203P60

更新时间： 2022-11-24 21:43:50

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
14页	148K
描述
PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Standby and Short Circuit

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1203P60 数据手册

NCP1203

PWM Current−Mode

Controller for Universal

Off−Line Supplies Featuring

Standby and Short Circuit

Protection

http://onsemi.com

Housed in SOIC−8 or PDIP−8 package, the NCP1203 represents a

major leap toward ultra−compact Switchmode Power Supplies and

represents an excellent candidate to replace the UC384X devices. Due

to its proprietary SMARTMOSt Very High Voltage Technology, the

circuit allows the implementation of complete off−line AC−DC

adapters, battery charger and a high−power SMPS with few external

components.

With an internal structure operating at a fixed 40 kHz, 60 kHz or

100 kHz switching frequency, the controller features a high−voltage

startup FET which ensures a clean and loss−less startup sequence. Its

current−mode control naturally provides good 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 improved efficiency at light loads

while offering excellent performance in standby conditions. Because

this occurs at a user adjustable low peak current, no acoustic noise

takes place.

The NCP1203 also includes an efficient protective circuitry which,

in presence of an output over load 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. Finally, a

temperature shutdown with hysteresis helps building safe and robust

power supplies.

MARKING

DIAGRAMS

SOIC−8

D1, D2 SUFFIX

CASE 751

xxxxxx

ALYW

xxxxxxxxx

AWL

PDIP−8

N SUFFIX

CASE 626

YYWW

= Specific Device Code

= Assembly Location

WL, L = Wafer Lot

Y, YY = Year

W, WW = Work Week

PIN CONNECTIONS

Adj

Features

• Pb−Free Packages are Available

• High−Voltage Startup Current Source

• Auto−Recovery Internal Output Short−Circuit Protection

• Extremely Low No−Load Standby Power

• Current−Mode with Adjustable Skip−Cycle Capability

• Internal Leading Edge Blanking

GND

Drv

(Top View)

• 250 mA Peak Current Capability

ORDERING INFORMATION

• Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz

• Direct Optocoupler Connection

See detailed ordering and shipping information in the package

dimensions section on page 12 of this data sheet.

• Undervoltage Lockout at 7.8 V Typical

• SPICE Models Available for TRANsient and AC Analysis

• Pin to Pin Compatible with NCP1200

Applications

• AC−DC Adapters for Notebooks, etc.

• Offline Battery Chargers

• Auxiliary Power Supplies (USB, Appliances, TVs, etc.)

Semiconductor Components Industries, LLC, 2004

Publication Order Number:

October, 2004− Rev. 4

NCP1203/D

12 3 4 5 6 7...14

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