NCP1380 ON Semiconductor, NCP1380 Datasheet

NCP1380

Manufacturer Part Number

NCP1380

Description

Quasi-Resonant Current Mode Controller

Manufacturer

ON Semiconductor

Datasheet

1.NCP1380.pdf (26 pages)

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Current page: 1 of 26
Download datasheet (459Kb)

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NCP1380

Quasi-Resonant

Current-Mode Controller for

High-Power Universal

Off-Line Supplies

powering quasi−resonant converters. Capitalizing on a proprietary

valley−lockout system, the controller shifts gears and reduces the

switching frequency as the power loading becomes lighter. This

results in a stable operation despite switching events always occurring

in the drain−source valley. This system works down to the 4

and toggles to a variable frequency mode beyond, ensuring an

excellent standby power performance.

an Over Power Protection (OPP) circuit which clamps the delivered

power at high−line. Safety−wise, a fixed internal timer relies on the

feedback voltage to detect a fault. Once the timer elapses, the

controller stops and stays latched for option A and C or enters

auto−recovery mode for option B and D.

features a pin to implement either a combined overvoltage /

overtemperature protection (Version A and B) or a combined

brown−out/overvoltage protection (Version C and D).

Features

•

Typical Applications

•

December, 2009 − Rev. 1

The NCP1380 hosts a high−performance circuitry aimed to

To improve the safety in overload situations, the controller includes

Particularly well suited for adapter applications, the controller

Operation

Efficiency

Versions)

Quasi−Resonant Peak Current−Mode Control Operation

Valley Switching Operation with Valley−Lockout for Noise−Immune

Frequency Foldback at Light Load to Improve the Light Load

Adjustable Over Power Protection

Auto−Recovery or Latched Internal Output Short−Circuit Protection

Fixed Internal 80 ms Timer for Short−Circuit Protection

Combined Overvoltage and Overtemperature Protection (A and B

Combined Overvoltage Protection and Brown−Out (C and D

+500 mA / −800 mA Peak Current Source/Sink Capability

Internal Temperature Shutdown

Direct Optocoupler Connection

Extended V

Extremely Low No−Load Standby Power

SO−8 Package

These Devices are Pb−Free and are RoHS Compliant

High Power ac−dc Converters for TVs, Set−Top Boxes etc.

Offline Adapters for Notebooks

Range Operation Up to 28 V

valley

See detailed ordering and shipping information in the package

dimensions section on page 25 of this data sheet.

CONTROLLER FOR HIGH

QUASI−RESONANT PWM

1380X = Specific Device Code

POWER AC−DC WALL

GND

ZCD

ORDERING INFORMATION

PIN CONNECTIONS

= Device Option (A, B, C, or D)

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

http://onsemi.com

ADAPTERS

CASE 751

D SUFFIX

SOIC−8

Publication Order Number:

DIAGRAMS

MARKING

FAULT

VCC

DRV

ALYWX

NCP1380/D

1380X

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