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| 型号： | LM5046SQ |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 540 kHz SWITCHING FREQ-MAX, QCC28 |
| 封装： | 5 X 5 MM, LLP-28 |
| 文件页数： | 21/32页 |
| 文件大小： | 888K |
| 代理商： | LM5046SQ |
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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
28
LM5046
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM5046SQ/NOPB | 功能描述:电流型 PWM 控制器 Phase-Shifted Full- Bridge PWM Cntrlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| LM5046SQX | 制造商:TI 制造商全称: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 类别:集成电路 (IC) >> PMIC - AC-DC 转换器，离线开关 系列:PowerWise® 标准包装:1 系列:FPS™ 输出隔离:隔离 频率范围:61kHz ~ 73kHz 输入电压:8 V ~ 26 V 输出电压:650V 功率（瓦特）:12W 工作温度:-40°C ~ 115°C 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-MDIP 包装:Digi-Reel® 其它名称: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 制造商全称:Texas Instruments 功能描述:High Side OR-ing FET Controller |
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