- 您現(xiàn)在的位置：買賣IC網(wǎng) > Datasheet目錄46 > TEA1750T/N1,518 (NXP Semiconductors)IC PFC CONTROLLER DCM16SOIC Datasheet資料下載
參數(shù)資料
| 型號： | TEA1750T/N1,518 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 17/29頁 |
| 文件大?。?/td> | 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： | 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) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁當(dāng)前第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁
TEA1750_2
?NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 02 15 December 2008
17 of 29
NXP Semiconductors
TEA1750
GreenChip III SMPS control IC
7.3.7 Maximum on-time
The yback controller limits the on-time of the external MOSFET to 25 祍 (typ). When the
on-time is longer than 25 祍, the IC stops switching and enters the safe restart mode.
7.3.8 Overvoltage protection (FBAUX pin)
An output overvoltage protection is implemented in the GreenChip III series. This works
for the TEA1750 by sensing the auxiliary voltage via the current owing into pin FBAUX
during the secondary stroke. The auxiliary winding voltage is a well-dened replica of the
output voltage. Voltage spikes are averaged by an internal lter.
If the output voltage exceeds the OVP trip level, an internal counter starts counting
subsequent OVP events. The counter has been added to prevent incorrect OVP detection
which might occur during ElectroStatic Discharge (ESD) or lightning events. If the output
voltage exceeds the OVP trip level a few times and not again in a subsequent cycle, the
internal counter counts down at twice the speed it uses when counting up. However, when
typically 8 cycles of subsequent OVP events are detected, the IC assumes a true OVP
and the OVP circuit switches the power MOSFET off. As the protection is latched, the
converter only restarts after the internal latch is reset. In a typical application the mains
should be interrupted to reset the internal latch.
The output voltage V
ovp(FBAUX)
at which the OVP function trips, can be set by the
demagnetization resistor, R
FBAUX
:
where N
s
is the number of secondary turns and N
aux
is the number of auxiliary turns of the
transformer. Current I
ovp(FBAUX)
is internally trimmed.
The value of R
FBAUX
can be adjusted to the turns ratio of the transformer, thus making an
accurate OVP detection possible.
Fig 12. Soft start-up of yback
014aaa020
SOFT START
CONTROL
OCP
+
10
FBSENSE
0.5 V
I
start(soft)fb d 60 礎(chǔ)
S2
R
SS2
C
SS2
R
SENSE2
V
o ovp
(
)
N
s
N
aux
----------- - I
ovp FBAUX
(
)
R
FBAUX
?/DIV>
V
clamp FBAUX
(
)
+
(
)
=
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，3分鐘左右您將得到回復(fù)。