Datasheet > NCP1378_06

NCP1378_06

更新时间： 2024-09-19 04:37:59

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	285K
描述
PWM Current−Mode Controller for Free−Running Quasi−Resonant Operation

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NCP1378_06 数据手册

NCP1378

PWM Current−Mode

Controller for Free−Running

Quasi−Resonant Operation

The NCP1378 combines a true current mode modulator and

a demagnetization detector to ensure full borderline/critical

Conduction Mode in any load/line conditions and minimum drain

voltage switching (Quasi−Resonant operation). Due to its inherent

skip cycle capability, the controller enters burst mode as soon as the

power demand falls below a predetermined level. As this happens at

low peak current, no audible noise can be heard. An internal 8.0 ms

timer prevents the free−run frequency to exceed 100 kHz (therefore

below the 150 kHz CISPR−22 EMI starting limit), while the skip

adjustment capability lets the user select the frequency at which the

burst foldback takes place.

http://onsemi.com

MARKING

DIAGRAMS

SOIC−8

D SUFFIX

CASE 751

1378

ALYW

The transformer core reset detection is done through an auxiliary

winding which, brought via a dedicated pin, also enables fast Over

Voltage Protection (OVP). Once an OVP has been detected, the IC

permanently latches off.

The NCP1378 also features an efficient protective circuitry that, in

presence of an overcurrent condition, disables the output pulses and

enters a safe burst mode, trying to restart. Once the default has gone,

the device auto−recovers. Finally an internal 1.0 ms Soft−Start

eliminates the traditional startup stress.

PDIP−7

P SUFFIX

CASE 626B

1378P

AWL

YYWWG

L, WL

Y, YY

= Assembly Location

= Wafer Lot

= Year

The NCP1378 is tailored for low voltage applications having

UVLO thresholds of 8.4 V (on) and 7.5 V (off).

W, WW = Work Week

G or G

= Pb−Free Package

Features

• Free−Running Borderline/Critical Mode Quasi−Resonant Operation

• Latched Overvoltage Protection

PIN CONNECTIONS

• Auto−Recovery Short−Circuit Protection Via UVLO Crossover

• Current−Mode with Adjustable Skip Cycle Capability

• Internal 1.0 ms Soft−Start

Dmg

• Internal Temperature Shutdown

• Internal Leading Edge Blanking

GND

Drv

• 500 mA Peak Current Source/Sink Capability

• External Latch Triggering, e.g. Via Overtemperature Signal

• Direct Optocoupler Connection

(Top View)

ORDERING INFORMATION

• SPICE Models Available for TRANsient Analysis

• Internal 8.0 ms Minimum T

†

OFF

Device

Package

Shipping

• Pb−Free Packages are Available*

NCP1378DR2

SOIC−8

2500 Tape & Reel

NCP1378DR2G

SOIC−8

(Pb−Free)

Typical Applications

• Battery−Based Operations

NCP1378P

PDIP−7

50 Units/Rail

NCP1378PG

PDIP−7

(Pb−Free)

†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.

*For additional information on our Pb−Free strategy and soldering details, please

downloadthe ON Semiconductor Soldering and Mounting Techniques Reference

Manual, SOLDERRM/D.

Semiconductor Components Industries, LLC, 2006

Publication Order Number:

October, 2006 − Rev. 4

NCP1378/D

12 3 4 5 6 7...16

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与NCP1378_06相关器件

型号	品牌	获取价格	描述	数据表
NCP1378DR2	ONSEMI	获取价格	PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation
NCP1378DR2G	ONSEMI	获取价格	PWM Current−Mode Controller for Free−Running Quasi−Resonant Operation
NCP1378P	ONSEMI	获取价格	PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation
NCP1378PG	ONSEMI	获取价格	PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation
NCP1379	ONSEMI	获取价格	Quasi-Resonant Current-Mode Controller for High-Power Universal Off-line Supplies
NCP1379_11	ONSEMI	获取价格	Quasi-Resonant Current-Mode Controller for High-Power Universal Off-line Supplies
NCP1379DR2G	ONSEMI	获取价格	Quasi-Resonant Current-Mode Controller for High-Power Universal Off-line Supplies
NCP137AFCT045T2G	ONSEMI	获取价格	700 mA, Very Low Dropout Bias Rail CMOS Voltage Regulator
NCP137AFCT105T2G	ONSEMI	获取价格	700 mA, Very Low Dropout Bias Rail CMOS Voltage Regulator
NCP137AFCT110T2G	ONSEMI	获取价格	700 mA, Very Low Dropout Bias Rail CMOS Voltage Regulator

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