參數(shù)資料
型號(hào)： L6917D
廠商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO28
封裝： SO-28
文件頁(yè)數(shù)： 15/27頁(yè)
文件大小： 411K
代理商： L6917D
L6917
22/27
Figure 16. PCB and Components Layouts
Design Example.
s
Output Voltage (nominal) 1.700V
s
Output Current (nominal) 45A
s
Static tolerance
+100mV; -50mV
Considering the high slope for the load transient, a high switching frequency has to be used. In addition to fast
reaction, this helps in reducing output and input capacitor. Inductance value is also reduced.
A switching frequency of 300kHz for each phase is then considered allowing large bandwidth for the compen-
sation network.
s
Current Reading Network and Over Current:
Since the maximum output current is 45A, the over current threshold has to be set at 140% of the
maximum nominal current, the over-current threshold has then to be set at 31.5A. Considering to sense
the output current across the low-side mosfet RdsON, STB90NF03L has 6.5m
max at 25° that
becomes 9.1m
considering the temperature variation (+40%); the resulting transconductance resistor
Rg has to be:
(R3 to R6)
s
Droop function Design:
Considering a voltage drop of 100mV at full load, the feedback resistor RFB has to be
(R7)
voltage drop at OCP threshold results in 140mV.
Internal SGND Plane
Solder Side
Rg
I
MA X
RdsON
35
-------------------------------------- -
31.5 9.1m
35
------------------------------
8.2k
==
=
R
FB
100mV
50
A
-------------------
2k
==
相關(guān)PDF資料
PDF描述
L6918ADTR SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PDSO28
L6918AD SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PDSO28
L6919CD SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO28
L6919E SWITCHING CONTROLLER, PDSO28
L6920DTR 1.2 A SWITCHING REGULATOR, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6917DTR 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Analog IC
L6918 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER
L6918A 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER
L6918AD 功能描述:DC/DC 開(kāi)關(guān)控制器 Prog Multi-Phase Cnt RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)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
L6918ADTR 功能描述:DC/DC 開(kāi)關(guān)控制器 Prog Multi-Phase Cnt RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)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
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

*
*
*