參數(shù)資料
型號(hào)： L6599ATDTR
廠商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
封裝： SOP-16
文件頁(yè)數(shù)： 4/31頁(yè)
文件大?。?/td> 861K
代理商： L6599ATDTR
Application information
L6599AT
12/31
Doc ID 15534 Rev 3
6
Application information
The L6599AT is an advanced double-ended controller specifically designed for resonant
half-bridge topology (see Figure 4.). In these converters the switches (MOSFETs) of the
half-bridge leg are alternately switched on and off (180° out-of-phase) for exactly the same
time interval. This is commonly referred to as operation at “50% duty cycle”, although the
real duty cycle, that is the ratio of the on-time of either switch to the switching period, is
actually less than 50%. The reason is that there is an internally fixed dead-time TD inserted
between the turn-off of either MOSFET and the turn-on of the other, where both MOSFETs
are off. This dead- time is essential for the converter to work correctly; it ensures soft-
switching and enable high-frequency operation with high efficiency and low EMI emissions.
To perform output voltage regulation of the converter, the device is capable of operating in
different modes (Figure 3), depending on the load conditions:
1.
Variable frequency at heavy and medium/light load. A relaxation oscillator (see
Section 6.1: Oscillator for more details) generates a symmetrical triangular waveform,
to which the MOSFETs' switching is locked. The frequency of this waveform is related
to a current that is modulated by the feedback circuitry. As a result, the tank circuit
driven by the half-bridge is stimulated at a frequency dictated by the feedback loop to
keep the output voltage regulated, thus exploiting its frequency-dependent transfer
characteristics.
2.
Burst-mode control with no or very light load. When the load falls below a certain value,
the converter enters a controlled intermittent operation, where a series of a few
switching cycles at a nearly fixed frequency are spaced out by long idle periods where
both MOSFETs are in an OFF-state. A further load decrease is translated into longer
idle periods, and then into a reduction of the average switching frequency. When the
converter is completely unloaded, the average switching frequency can go down to
even a few hundred hertz, thus minimizing any magnetizing current losses as well as all
frequency-related losses, and making it easier to comply with energy saving
recommendations.
Figure 3.
Multi-mode operation of the L6599AT
相關(guān)PDF資料
PDF描述
L6599D 0.8 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
L6599N 0.8 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP16
L6599TR 0.8 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
L6610D 6-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO24
L6610N 6-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6599ATN 制造商:STMicroelectronics 功能描述:
L6599D 功能描述:軟開(kāi)關(guān) PWM 控制器 Hi Vltg resonant Controller RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
L6599DTR 功能描述:軟開(kāi)關(guān) PWM 控制器 Hi Vltg resonant Controller RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
L6599N 功能描述:軟開(kāi)關(guān) PWM 控制器 Hi Vltg resonant Controller RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
L6599NR 功能描述:電壓模式 PWM 控制器 HV resonant CNTRL RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
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(xiě)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

*
*
*