參數(shù)資料
型號(hào)： TEA1750T/N1,518
廠商： NXP Semiconductors
文件頁(yè)數(shù)： 8/29頁(yè)
文件大小： 163K
描述： IC PFC CONTROLLER DCM16SOIC
標(biāo)準(zhǔn)包裝： 2,500
系列： GreenChip™ III
模式： 間歇導(dǎo)電（DCM）
頻率 - 開關(guān)： 100kHz ~ 150kHz
電流 - 啟動(dòng)： 60µA
安裝類型： 表面貼裝
封裝/外殼： 16-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SO
包裝： 帶卷 (TR)
TEA1750_2
?NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 02  15 December 2008
8 of 29
NXP Semiconductors
TEA1750
GreenChip III SMPS control IC
7.1.4   Fast latch reset
In a typical application, the mains can be interrupted briey to reset the latched protection.
The PFC bus capacitor, C
bus
, does not have to discharge for this latched protection to
reset.
Typically the PFC bus capacitor, C
bus
, has to discharge for the V
CC
 to drop to this reset
level. When the latched protection is set, the clamping circuit of the VINSENSE circuit is
disabled (see also
Section
7.2.8). As soon as the VINSENSE voltage drops below
750 mV (typ) and then is raised to 870 mV (typ), the latched protection is reset.
The latched protection will also be reset by removing both the voltage on pin V
CC
 and on
pin HV.
7.1.5   Overtemperature protection (OTP)
An accurate internal temperature protection is provided in the circuit. When the junction
temperature exceeds the thermal shutdown temperature, the IC only stops switching. As
long as OTP is active, the V
CC
 capacitor is not recharged from the HV mains. The OTP
circuit is supplied from the HV pin if the V
CC
 supply voltage is not sufcient.
OTP is a latched protection. It can be reset by removing both the voltage on pin V
CC
 and
on pin HV or by the fast latch reset function, see
Section
7.1.4
7.2  Power factor correction circuit
The power factor correction circuit operates in quasi-resonant or discontinuous conduction
mode with valley switching. The next primary stroke is only started when the previous
secondary stroke has ended and the voltage across the PFC MOSFET has reached a
minimum value. The voltage on the PFCAUX pin is used to detect transformer
demagnetization and the minimum voltage across the external PFC MOSFET switch.
7.2.1   t
on
 control
The power factor correction circuit is operated in t
on
control. The resulting mains harmonic
reduction of a typical application is well within the class-D requirements.
7.2.2   Valley switching and demagnetization (PFCAUX pin)
The PFC MOSFET is switched on after the transformer is demagnetized. Internal circuitry
connected to the PFCAUX pin detects the end of the secondary stroke. It also detects the
voltage across the PFC MOSFET. The next stroke is started if the voltage across the PFC
MOSFET is at its minimum in order to reduce switching losses and electromagnetic
interference (EMI) (valley switching).
If no demagnetization signal is detected on the PFCAUX pin, the controller generates a
zero current signal (ZCS), 50 祍 (typ) after the last PFC gate signal.
If no valley signal is detected on the PFCAUX pin, the controller generates a valley signal
4 祍 (typ) after demagnetization was detected.
To protect the internal circuitry, for example during lightning events, it is advisable to add
a 5 k& series resistor to this pin. To prevent incorrect switching due to external
disturbance, the resistor should be placed close to the IC on the printed circuit board.
相關(guān)PDF資料
PDF描述
TEA1751T/N1,518 IC CTRLR GREENCHIP SMPS 16-SOIC
TEA1761T/N2,118 IC CTRLR GREENCHIP SYNC 8-SOIC
TEA1762T/N2/DG,118 IC CTLR SMPS SW SO14
TEA1791T/N1,118 IC CTRLR GREENCHIP SYNC 8-SOIC
TMP03FS-REEL IC SENSOR TEMP/SERIAL OC 8SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TEA1750T-T 功能描述:DC/DC 開關(guān)控制器 GREENCHIPIII RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TEA1751AT/N1,518 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TEA1751AT/N1518 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述:
TEA1751LT 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChip III SMPS control IC
TEA1751LT/N1 制造商:NXP Semiconductors 功能描述:AC-DC PFC FLYBACK CNTRL 16SOIC 制造商:NXP Semiconductors 功能描述:AC-DC, PFC, FLYBACK, CNTRL, 16SOIC 制造商:NXP Semiconductors 功能描述:GreenChip III SMPS Control 16-Pin SO
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*