- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67754 > L6717 (STMICROELECTRONICS) DUAL SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, QCC48 PDF資料下載
參數(shù)資料
| 型號： | L6717 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, QCC48 |
| 封裝： | 7 X 7 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFQFPN-48 |
| 文件頁數(shù)： | 48/56頁 |
| 文件大?。?/td> | 1081K |
| 代理商： | L6717 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁當前第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁
Layout guidelines
L6717
52/56
Doc ID 17326 Rev 1
13
Layout guidelines
Layout is one of the most important things to consider when designing high current
applications. A good layout solution can generate a benefit in lowering power dissipation on
the power paths, reducing radiation and a proper connection between signal and power
ground can optimize the performance of the control loops.
Two kind of critical components and connections have to be considered when laying-out a
VRM based on L6717: power components and connections and small signal components
connections.
13.1
Power components and connections
These are the components and connections where switching and high continuous current
flows from the input to the load. The first priority when placing components has to be
reserved to this power section, minimizing the length of each connection and loop as much
as possible. To minimize noise and voltage spikes (EMI and losses) these interconnections
must be a part of a power plane and anyway realized by wide and thick copper traces: loop
must be anyway minimized. The critical components, i.e. the power transistors, must be
close one to the other. The use of multi-layer printed circuit board is recommended.
Traces between the driver section and the MOSFETs should be wide to minimize the
inductance of the trace so minimizing ringing in the driving signals. Moreover, VIAs count
needs to be minimized to reduce the related parasitic effect.
Locate the bypass capacitor (VCC, VCCDR and BOOT capacitors) close to the device with
the shortest possible loop and use wide copper traces to minimize parasitic inductance.
Systems that do not use Schottky diodes in parallel to the low-side MOSFET might show big
negative spikes on the phase pin. This spike can be limited as well as the positive spike but
it causes the bootstrap capacitor to be over-charged. This extra-charge can cause, in the
worst case condition of maximum input voltage and during particular transients, that boot-to-
phase voltage overcomes the abs.max.ratings also causing device failures. It is then
suggested in this cases to limit this extra-charge by adding a small resistor RBOOT in series
to the boot capacitor or the boot diode. The use of RBOOT also contributes in the limitation of
the spike present on the BOOT pin.
Figure 20.
Driver turn-on and turn-off paths
RGATE
RINT
CGD
CGS
CDS
VCCDR
LSx DRIVER
LS MOSFET
GND (PAD)
LGATEx
RGATE
RINT
CGD
CGS
CDS
BOOTx
HSx DRIVER
HS MOSFET
PHASEx
HGATEx
R
BOOT
相關PDF資料 |
PDF描述 |
|---|---|
| L6728HTR | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO10 |
| L6728H | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO10 |
| L6728 | 1.5 A SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, DSO10 |
| L6728TR | 1.5 A SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, DSO10 |
| L6731BTR | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| L6717TR | 功能描述:開關變換器、穩(wěn)壓器與控制器 High-Efficienc AM2r2 Hybrid Controller RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L6718TR | 功能描述:其他電源管理 Multiphase Dual PWM VR12 25MHz LTB RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| L6720 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。