參數(shù)資料
型號(hào)： L6740L
廠商： STMICROELECTRONICS
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PQFP48
封裝： 7 X 7 MM, 1 MM HEIGHT, HTQFP-48
文件頁(yè)數(shù)： 30/44頁(yè)
文件大?。?/td> 755K
代理商： L6740L
Main oscillator
L6740L
8
Main oscillator
The controller embeds a dual-oscillator: one section is used for the CORE and it is a multi
phase programmable oscillator managing equal phase-shift among all phases and the other
section is used for the NB section. Phase-shift between the CORE and NB ramps is
automatically adjusted according to the CORE phase # programmed.
The internal oscillator generates the triangular waveform for the PWM charging and
discharging with a constant current an internal capacitor. The switching frequency for each
channel, FSW, is internally fixed at 150 kHz: the resulting switching frequency for the CORE
section at the load side results in being multiplied by N (number of configured phases).
The current delivered to the oscillator is typically 22
μA (corresponding to the free running
frequency FSW = 150 kHz) and it may be varied using an external resistor (ROSC) typically
connected between the OSC pin and SGND. Since the OSC pin is fixed at 1.240 V, the
frequency is varied proportionally to the current sunk from the pin considering the internal
gain of 6.8 kHz/
μA (See Figure 15).
Connecting ROSC to SGND the frequency is increased (current is sunk from the pin),
according to the following relationships:
Figure 15.
ROSC vs. switching frequency
F
SW
150kHz
1.240V
R
OSC kΩ
()
---------------------------- 6.8
kHz
μA
-----------
+
150kHz
8.432 10
6
R
OSC kΩ
()
-----------------------------
+
==
相關(guān)PDF資料
PDF描述
L9705D013TR SPECIALTY ANALOG CIRCUIT, PDSO20
L9953LXPTR SPECIALTY CONSUMER CIRCUIT, PDSO36
L9953LXP SPECIALTY CONSUMER CIRCUIT, PDSO36
LA1177 1-BAND, AUDIO TUNER, PSIP9
LA1178M 1-BAND, AUDIO TUNER, PDSO10
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6740LTR 功能描述:DC/DC 開關(guān)控制器 Hybrid controller 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
L6741 功能描述:功率驅(qū)動(dòng)器IC SnglPphase Dual MOSFET Driver RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
L6741TR 功能描述:功率驅(qū)動(dòng)器IC SnglPphase Dual MOSFET Driver RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
L6743 功能描述:功率驅(qū)動(dòng)器IC SnglPphase Dual MOSFET Driver RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
L6743_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:High current MOSFET driver
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

*
*
*