參數(shù)資料
型號(hào)： LM5046SQ
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 540 kHz SWITCHING FREQ-MAX, QCC28
封裝： 5 X 5 MM, LLP-28
文件頁(yè)數(shù)： 17/32頁(yè)
文件大?。?/td> 888K
代理商： LM5046SQ
30147838
FIGURE 15. Basic UVLO Configuration
30147839
FIGURE 16. Basic OVP Configuration
The UVLO and OVP can also be set together using a 3 re-
sistor divider ladder as shown in Figure 17. R
1 is calculated
as explained in the basic UVLO divider selection. Using the
same values, as in the above two examples, for the UVLO
and OVP set points, R
1 and R3 remain the same at 100k
and 1.5k
. The R
2 is 2.7k obtained by subtracting R3 from
4.2k
.
Remote configuration of the controller’s operational modes
can be accomplished with open drain device(s) connected to
the UVLO pin as shown in Figure 18.
Figure 19 shows an application of the OVP comparator for
Remote Thermal Protection using a thermistor (or multiple
thermistors) which may be located near the main heat
sources of the power converter. The negative temperature
coefficient (NTC) thermistor is nearly logarithmic, and in this
example a 100k
thermistor with the β material constant of
4500 Kelvin changes to approximately 2k
at 130C. Setting
R
1 to one-third of this resistance (665) establishes 130C as
the desired trip point (for VREF = 5V). In a temperature band
from 20C below to 20C above the OVP threshold, the volt-
age divider is nearly linear with 25mV per C sensitivity.
R
2 provides temperature hysteresis by raising the OVP com-
parator input by R
2 x 20A. For example, if a 22k resistor is
selected for R
2, then the OVP pin voltage will increase by 22k
x 20A = 506mV. The NTC temperature must therefore fall
by 506mV / 25mV per C = 20C before the LM5046 switches
from standby mode to the normal mode.
www.national.com
24
LM5046
相關(guān)PDF資料
PDF描述
LM5046MHX SWITCHING CONTROLLER, 540 kHz SWITCHING FREQ-MAX, PDSO28
LM5067SDX-2 2-CHANNEL POWER SUPPLY SUPPORT CKT, DSO10
LM5067SD-2 2-CHANNEL POWER SUPPLY SUPPORT CKT, DSO10
LM555H PULSE; RECTANGULAR, TIMER, MBCY8
LM555H/883B PULSE; RECTANGULAR, TIMER, MBCY8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM5046SQ/NOPB 功能描述:電流型 PWM 控制器 Phase-Shifted Full- Bridge PWM Cntrlr RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
LM5046SQX 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:LM5046 Phase-Shifted Full-Bridge PWM Controller with Integrated MOSFET Drivers
LM5046SQX/NOPB 功能描述:IC PWM CTRLR FULL BRIDG 28LLP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - AC-DC 轉(zhuǎn)換器，離線(xiàn)開(kāi)關(guān) 系列:PowerWise® 標(biāo)準(zhǔn)包裝:1 系列:FPS™ 輸出隔離:隔離 頻率范圍:61kHz ~ 73kHz 輸入電壓:8 V ~ 26 V 輸出電壓:650V 功率（瓦特）:12W 工作溫度:-40°C ~ 115°C 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-MDIP 包裝:Digi-Reel® 其它名稱(chēng):FSL206MRBNFSDKR
LM505 制造商:LM TECHNOLOGIES 功能描述:ADAPTER BLUETOOTH NANO EDR 40M USB 制造商:LM TECHNOLOGIES 功能描述:BLUETOOTH ADAPTER, USB, BCM2045, EDR 制造商:LM TECHNOLOGIES 功能描述:BLUETOOTH ADAPTER, USB, BCM2045, 40M, EDR; Data Rate:2.166Mbps; Operating Temperature Min:-20C; Operating Temperature Max:75C; Operating Frequency Range:2.402GHz to 2.48GHz; Operating Temperature Range:-20C to +75C ;RoHS Compliant: Yes
LM5050-1 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:High Side OR-ing FET Controller
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

*
*
*