NCP1338

更新时间： 2024-09-19 05:52:03

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
15页	155K
描述
PWM Current-Mode Controller for Free Running Quasi-Resonant Operation

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中文翻译

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NCP1338 数据手册

NCP1338

PWM Current-Mode

Controller for Free Running

Quasi-Resonant Operation

The NCP1338 combines a true current mode modulator and a

demagnetization detector which ensures full Borderline/Critical

Conduction Mode in any load/line conditions together with

minimum drain voltage switching (Quasi-Resonant operation). The

transformer core reset detection is done internally, without using any

external signal, due to the Soxyless concept. The frequency is

internally limited to 130 kHz, preventing the controller from

operating above the 150 kHz CISPR-22 EMI starting limit.

By monitoring the feedback pin activity, the controller enters

ripple mode as soon as the power demand falls below a

predetermined level. As each restart is softened by an internal

Soft-Skipt, and as the frequency cannot go below 25 kHz, no

audible noise can be heard.

http://onsemi.com

MARKING

DIAGRAM

NCP1338P

AWL

YYWWG

PDIP-7

P SUFFIX

CASE 626B

The NCP1338 also features an efficient protective circuitry which,

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. Also included is a bulk voltage

monitoring function (known as brown-out protection), an adjustable

P1338

ALYWꢁG

SOIC-7

D SUFFIX

CASE 751U

overpower compensation, and a V OVP. Finally, an internal 4.0 ms

Soft-Skip eliminates the traditional startup stress. NCP1338 can be

used in applications where the V supply voltage is delivered by an

external dc voltage source.

= Assembly Location

WL, L = Wafer Lot

YY, Y = Year

WW, W = Work Week

G, G

= Pb-Free Package

Features

(Note: Microdot may be in either location)

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

•ꢀCurrent-Mode

PIN CONNECTIONS

•ꢀSoft-Skip Mode with Minimum Switching Frequency for Standby

•ꢀAuto-Recovery Short-Circuit Protection Independent of Auxiliary

Voltage

•ꢀOvervoltage Protection

VCC

DRV

•ꢀBrown-Out Protection

GND

•ꢀTwo Externally Triggerable Fault Comparators (one for a disable

function, and the other for a permanent latch)

•ꢀInternal 4.0 ms Soft-Skip

(Top View)

ORDERING INFORMATION

•ꢀ500 mA Peak Current Drive Sink Capability

•ꢀ130 kHz Max Frequency

Device

Package

Shipping†

•ꢀInternal Leading Edge Blanking

NCP1338PG

PDIP-7

50 Units/Rail

•ꢀInternal Temperature Shutdown

(Pb-Free)

•ꢀDirect Optocoupler Connection

NCP1338DR2G

SOIC-7

2500 Tape & Reel

•ꢀDynamic Self-Supply with Levels of 12 V (On) and 10 V (Off)

•ꢀSPICE Models Available for TRANsient and AC Analysis

•ꢀThese are Pb-Free Devices

(Pb-Free)

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

Typical Applications

•ꢀAc-dc Adapters for Notebooks, etc.

•ꢀOffline Battery Chargers

•ꢀConsumer Electronics (DVD Players, Set-Top Boxes, TVs, etc.)

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

April, 2008 - Rev. 0

Publication Order Number:

NCP1338/D

12 3 4 5 6 7...15

中文翻译

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与NCP1338相关器件

型号	品牌	获取价格	描述	数据表
NCP1338DR2G	ONSEMI	获取价格	PWM Current-Mode Controller for Free Running Quasi-Resonant Operation
NCP1338PG	ONSEMI	获取价格	PWM Current-Mode Controller for Free Running Quasi-Resonant Operation
NCP1339	ONSEMI	获取价格	High-Voltage, Quasi-Resonant Controller featuring Valley Lock-Out
NCP1339_16	ONSEMI	获取价格	High-Voltage, QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode
NCP1339CDR2G	ONSEMI	获取价格	High-Voltage, QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode
NCP1339DDR2G	ONSEMI	获取价格	High-Voltage, QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode
NCP1339EDR2G	ONSEMI	获取价格	High-Voltage, QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode
NCP1339FDR2G	ONSEMI	获取价格	High-Voltage, QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode
NCP1339GDR2G	ONSEMI	获取价格	High-Voltage, QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode
NCP1339HDR2G	ONSEMI	获取价格	High-Voltage, QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode

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