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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)： | 43/56頁 |
| 文件大?。?/td> | 1081K |
| 代理商： | L6717 |
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High current embedded drivers
L6717
48/56
Doc ID 17326 Rev 1
10.2
Power dissipation
It is important to consider the power that the device is going to dissipate in driving the exter-
nal MOSFETs 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 (PDC) depends on the static consumption of the device through the
supply pins and it is simply quantifiable as follow:
●
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 PSW
dissipated to switch the MOSFETs 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 MOSFETs for each phase featuring embedded
driver results:
Where QGHSx is the total gate charge of the HS MOSFETs and QGLSx is the total gate
charge of the LS MOSFETs for both CORE and NB sections (only Phase1 and Phase2
for CORE section); VBOOTx is the driving voltage for the HSx MOSFETs.
P
DC
V
CC
I
CC
V
VCCDR
I
VCCDR
+
=
P
SWx
F
SW
Q
GLSx
VCCDR
Q
GHSx
VBOOTx
+
()
=
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相關代理商/技術(shù)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: |
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