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參數(shù)資料
| 型號： | TEA1742T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A POWER FACTOR CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 3.90 MM, PLASTIC, MS-012, SOT96-1, SOP-8 |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 99K |
| 代理商： | TEA1742T |
TEA1742T_1
NXP B.V. 2009. All rights reserved.
Objective data sheet
Rev. 01 — 10 February 2009
6 of 17
NXP Semiconductors
TEA1742T
GreenChip PFC controller
7.1.2 Supply management
All internal reference voltages are derived from a temperature compensated and trimmed
on-chip band gap circuit. Internal reference currents are derived from a temperature
compensated and trimmed on-chip current reference circuit.
7.1.3 OverTemperature Protection (OTP)
An accurate internal temperature protection is provided in the circuit. When the junction
temperature exceeds the thermal shut-down temperature, the IC stops switching.
OTP is a latched protection. It can be reset by removing the voltage on pin VCC.
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 ton control
The power factor correction circuit is operated in ton control. The resulting mains harmonic
reduction of a typical application is well within the class-D requirements.
Fig 4.
Start-up sequence, normal operation and restart sequence
VCC
PFCSENSE
PFCDRIVER
VOSENSE
apply
mains
and VCC
starting
converter
normal
operation
protection
restart
soft start
Vstop(VINSENSE)
VSTART
VUVLO
VINSENSE
014aaa737
Vstart(VINSENSE)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TEA1742T/N1,118 | 功能描述:DC/DC 開關控制器 GreenChip PFC controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
| TEA1750 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:The TEA1750 combines a controller for Power Factor Correction (PFC) and a flyback controller. |
| TEA1750T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChip III SMPS control IC |
| TEA1750T,518 | 制造商:NXP Semiconductors 功能描述:SYNC RECTIFIER (SR) CONTROLLER |
| TEA1750T/N1,518 | 功能描述:DC/DC 開關控制器 GREENCHIPIII RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
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