參數(shù)資料
型號: LM5046MHX
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 540 kHz SWITCHING FREQ-MAX, PDSO28
封裝: TSSOP-28
文件頁數(shù): 21/32頁
文件大?。?/td> 888K
代理商: LM5046MHX
301478101
FIGURE 23. Circuit to Speed-up the Turn-off Process
Depending on the gate charge characteristics of the primary
FET, if it is required to speed up both the turn-on and the turn-
off time, a bipolar totem pole structure as shown in Figure
24 can be used. When LO1 goes high, the gate to source
current is sourced through the NPN transistor Q1 and similar
to the circuit shown in Figure 23 when LO1 goes low the PNP
transistor Q2 expedites the turn-off process.
301478102
FIGURE 24. Bipolar Totem Pole Arrangement
Alternatively, a low side gate driver such as LM5112 can be
utilized instead of the discrete totem pole. The LM5112 comes
in a small package with a 3A source and a 7A sink capability.
While driving the high-side FET, the HS1 acts as a local
ground and the boot capacitor between the BST and HS pins
acts as VCC.
www.national.com
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LM5046
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LM5046SQ 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM5046 Phase-Shifted Full-Bridge PWM Controller with Integrated MOSFET Drivers
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LM5046SQX 制造商:TI 制造商全稱: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 類別:集成電路 (IC) >> PMIC - AC-DC 轉(zhuǎn)換器,離線開關 系列:PowerWise® 標準包裝: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) 供應商設備封裝:8-MDIP 包裝:Digi-Reel® 其它名稱:FSL206MRBNFSDKR