- 您现在的位置：买卖IC网 > PDF目录98191 > TDA4863 (INFINEON TECHNOLOGIES AG) POWER FACTOR CONTROLLER, PDIP8 PDF资料下载
参数资料
| 型号： | TDA4863 |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 稳压器 |
| 英文描述： | POWER FACTOR CONTROLLER, PDIP8 |
| 封装： | PLASTIC, DIP-8 |
| 文件页数： | 2/27页 |
| 文件大小： | 302K |
| 代理商： | TDA4863 |
第1页当前第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页
TDA4863
Functional Description
Version 2.1
10
2005-02-18
2.4
Overvoltage Regulator
Because of the integrators low bandwidth fast changes of the output voltage can’t be
regulated within an adequate time. Fast output changes occur during initial start-up,
sudden load removal, or output arcing. While the integrators differential input voltage
remains zero during this fast changes a peak current is flowing through the external
capacitor into pin VAOUT. If this current exceeds an internal defined margin the
overvoltage regulator circuitry reduces the multiplier output voltage. As a result the on
time of the MOSFET is reduced.
2.5
Multiplier
The one quadrant multiplier regulates the gate driver with respect of the DC output
voltage and the AC half wave rectified input voltage. Both inputs are designed to achieve
good linearity over a wide dynamic range to represent an AC line free from distortion.
Special efforts are made to assure universal line applications with respect to a 90 to
270 V AC range.
The multiplier output is internally clamped at 1.3 V. So the MOSFET is protected against
critical operating during start up.
2.6
Current Sense Comparator, LEB and RS Flip-Flop
An external sense resistor transfers the source current of the MOSFET into a sense
voltage.The multiplier output voltage is compared with this sense voltage.
To protect the current comparator input from negative pulses a current source is inserted
which sends current out of the ISENSE pin every time when VISENSE-signal is falling
below ground potential. The switch-on current peak of the MOSFET is blanked out via a
leading edge blanking circuit with a blanking time of typically 200 ns.
The RS Flip-Flop ensures that only one single switch-on and switch-off pulse appears at
the gate drive output during a given cycle (double pulse suppression).
2.7
Zero Current Detector
The zero current detector senses the inductor current via an auxiliary winding and
ensures that the next on-time of the MOSFET is initiated immediately when the inductor
current has reached zero. This diminishes the reverse recovery losses of the boost
converter diode. The MOSFET is switched off when the voltage drop of the shunt resistor
reaches the voltage level of the multiplier output. So the boost current waveform has a
triangular shape and there are no deadtime gaps between the cycles. This leads to a
continuous AC line current limiting the peak current to twice of the average current.
To prevent false tripping the zero current detector is designed as a Schmitt-Trigger with
a hysteresis of 0.5 V. An internal 5 V clamp protects the input from overvoltage
相关PDF资料 |
PDF描述 |
|---|---|
| TDA4863G | POWER FACTOR CONTROLLER, PDSO8 |
| TDA4866J | VERTICAL DEFLECTION IC, PZIP9 |
| TDA4882N | SPECIALTY CONSUMER CIRCUIT, PDIP20 |
| TDA4884N | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP20 |
| TDA4885N | SPECIALTY CONSUMER CIRCUIT, PDIP32 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA4863_05 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:Power Factor Controller IC for High Power Factor and Low THD |
| TDA48632 | 功能描述:功率因数校正 IC RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| TDA4863-2 | 功能描述:功率因数校正 IC BOOST CONTROLLER FOR HI PWR FACTOR/LW THD RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| TDA4863-2_05 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:Power-Factor Controller (PFC) IC for High Power Factor and Low THD |
| TDA48632G | 功能描述:功率因数校正 IC RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。