- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄384586 > L6741 (意法半導(dǎo)體) High current MOSFET driver PDF資料下載
參數(shù)資料
| 型號(hào)： | L6741 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | High current MOSFET driver |
| 中文描述： | 高電流MOSFET驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 9/16頁(yè) |
| 文件大?。?/td> | 265K |
| 代理商： | L6741 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)當(dāng)前第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)
L6741
Device description and operation
9/16
Bootstrap capacitor needs to be designed in order to show a negligible discharge due to the
High-Side MOSFET turn-on. In fact it must give a stable voltage supply to the High-Side
driver during the MOSFET turn-on also minimizing the power dissipated by the embedded
Boot Diode.
Figure 5
gives some guidelines on how to select the capacitance value for the
bootstrap according to the desired discharge and depending on the selected mosfet.
Figure 5.
Bootstrap capacitance design
5.4
Gate driver voltage flexibility
L6741 allows the user to freely-select the gate drive voltage in order to optimize the effi-
ciency of the application.
The Low-Side MOSFET driving voltage depends on the voltage applied to VCC and can
range between 5V to 12V buses.
The High-Side MOSFET driving voltage depends on the voltage applied to PVCC (directly
impacting the bootstrap capacitor voltage) and can range between 5V to 12V buses.
5.5
Power dissipation
L6741 embeds high current drivers for both High-Side and Low-Side MOSFETs: it is then
important to consider the power that the device is going to dissipate in driving them in order
to avoid overcoming the maximum junction operative temperature.
Two main terms contribute in the device power dissipation: bias power and drivers' power.
Device Power (P
DC
) depends on the static consumption of the device through the
supply pins and it is simply quantifiable as follow:
P
DC
V
CC
I
CC
V
PVCC
I
PVCC
+
=
●
●
Drivers' power is the power needed by the driver to continuously switch ON and OFF
the external MOSFETs; it is a function of the switching frequency and total gate charge
of the selected MOSFETs. It can be quantified considering that the total power P
SW
dissipated to switch the MOSFETs dissipated by three main factors: external gate
resistance (when present), intrinsic MOSFET resistance and intrinsic driver resistance.
0.0
0.5
1.0
1.5
2.0
2.5
0
10
20
30
40
50
60
70
80
90
100
High-Side MOSFET Gate Charge [nC]
B
Cboot = 47nF
Cboot = 100nF
Cboot = 220nF
Cboot = 330nF
Cboot = 470nF
0
500
1000
1500
2000
2500
0.0
0.2
0.4
0.6
0.8
1.0
Boot Cap Delta Voltage [V]
B
Qg = 10nC
Qg = 25nC
Qg = 50nC
Qg = 100nC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6741TR | High current MOSFET driver |
| L6743 | High current MOSFET driver |
| L6743Q | High current MOSFET driver |
| L6919E | 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT |
| L6919ETR | 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(lèi)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(lèi)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 |
| L6743B | 功能描述:功率驅(qū)動(dòng)器IC Hi-current MOSFET Driver RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類(lèi)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 |
| L6743BTR | 功能描述:功率驅(qū)動(dòng)器IC HIGH CURRENT MOSFET DRIVER DC-DC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類(lèi)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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。