- 您现在的位置：买卖IC网 > PDF目录97995 > L6714TR (STMICROELECTRONICS) SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 PDF资料下载
参数资料
| 型号： | L6714TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| 封装： | 10 X 10 MM, LEAD FREE, TQFP-64 |
| 文件页数： | 24/70页 |
| 文件大小： | 694K |
| 代理商： | L6714TR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页当前第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页
Power dissipation
L6714
30/70
9
Power dissipation
L6714 embeds high current MOSFET drivers for both high side and low side MOSFET: it is
then important to consider the power the device is going to dissipate in driving them in order
to avoid overcoming the maximum junction operative temperature. In addition, since the
device has an exposed pad to better dissipate the power, the thermal resistance between
junction and ambient consequent to the layout is also important: thermal pad need to be
soldered to the PCB ground plane through several VIAs in order to facilitate the heat
dissipation.
Two main terms contribute to the device power dissipation: bias power and drivers' power.
The first one (PDC) depends on the static consumption of the device through the supply pins
and is simply quantifiable as follows (assuming to supply HS and LS drivers with the same
VCC of the device):
where N is the number of phases.
Drivers' power is the power needed by the driver to continuously switch on and off the
external MOSFET; it is a function of the switching frequency and total gate charge of the
selected MOSFET. It can be quantified considering that the total power PSW dissipated to
switch the MOSFET (easy calculable) is dissipated by three main factors: external gate
resistance (when present), intrinsic MOSFET resistance and intrinsic driver resistance. This
last term is the important one to be determined to calculate the device power dissipation.
The total power dissipated to switch the MOSFET results:
External gate resistors help the device to dissipate the switching power since the same
power PSW will be shared between the internal driver impedance and the external resistor
resulting in a general cooling of the device. When driving multiple MOSFET in parallel, it is
suggested to use one gate resistor for each MOSFET.
P
DC
V
CC
I
CC
NI
CCDRx
NI
BOOTx
++
()
=
P
SW
NF
SW
Q
GHS
V
BOOT
Q
GLS
V
CCDRx
+
()
=
相关PDF资料 |
PDF描述 |
|---|---|
| L6714 | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| L6725TR | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| L6728ATR | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
| L6728A | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
| L6728D | 30 A SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6716 | 制造商:STMicroelectronics 功能描述:DC DC Cntrlr Quad-OUT Sync Step Down 48-Pin VFQFPN EP Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:2/3/4 Phase Controlr Embedded Driver |
| L6716TR | 功能描述:开关变换器、稳压器与控制器 2/3/4 phase CNTRL Embedded Drivers RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L6717 | 制造商:STMicroelectronics 功能描述:High-Efficiency Hybrid AM2r2 Controller 48-Pin VFQFPN Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
| L6717A | 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
| L6717ATR | 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller T/R 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Tape and Reel 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
发布紧急采购，3分钟左右您将得到回复。