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參數(shù)資料
| 型號(hào)： | L6711 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 3 PHASE CONTROLLER WITH DYNAMIC VID AND SELECTABLE DACs |
| 中文描述： | 3相控制器，動(dòng)態(tài)VID和可選數(shù)模轉(zhuǎn)換器 |
| 文件頁數(shù)： | 33/38頁 |
| 文件大?。?/td> | 591K |
| 代理商： | L6711 |
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L6711
absorb energy and it can cause damages. The voltage spikes must be limited by proper layout; by the
use of gate resistors, Schottky diodes in parallel to the low side mosfets and/or snubber network on the
low side mosfets, and cannot overcome 26V, for 20nSec, at F
SW
= 600kHz.
■
Boot Capacitor Extra Charge.
Systems that do not use Schottky diodes might show big negative spikes
on the phase pin. This spike can be limited as well as the positive spike but has an additional
consequence: 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 in series to the boot diode (one resistor can be
enough for all the three diodes if placed upstream the diode anode, see Figure 24).
18.3 Current Sense Connections.
Remote Buffer:
The input connections for this component must be routed as parallel nets from the FBG/
FBR pins to the load in order to compensate losses along the output power traces and also to avoid the
pick-up of any common mode noise. Connecting these pins in points far from the load will cause a non-
optimum load regulation, increasing output tolerance.
Current Reading:
The Rg resistors have to be placed as close as possible to the CSx- and CSx+ pins in
order to limit the noise injection into the device; this is still valid also for the R
g(RC)
-Cg network used when
sensing current across the inductor. The PCB traces connecting these resistors to the reading point must
use dedicated nets, routed as parallel traces in order to avoid the pick-up of any common mode noise.
Figure 25. Device orientation (left) and sense nets routing (right: red for Lsense, black for LSsense)
It's also important to avoid any offset in the measurement and, to get a better precision, to connect the
traces as close as possible to the sensing elements. Symmetrical layout is also suggested.
Small filtering capacitor can be needed between VOUT and SGND on the CSx- line, placed near the con-
troller, allowing higher layout flexibility in the current sense connection.
H
L
H
L
L
H
VCCDR
V
V
T
O
C
T
(
T
(
C
R
R
R
C
C
C
C
C
R
R
R
C
R
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6711TR | 3 PHASE CONTROLLER WITH DYNAMIC VID AND SELECTABLE DACs |
| L6714 | 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs |
| L6714TR | 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs |
| L6726A | Single phase PWM controller |
| L6726ATR | Single phase PWM controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6711_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3 Phase controller with dynamic VID and selectable DACs |
| L6711TR | 功能描述:DC/DC 開關(guān)控制器 3 PHASE CONTROLLER RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| L6712 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712_05 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
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