- 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： | 55/70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页当前第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
L6714
System control loop compensation
59/70
Compensation network can be simply designed placing
ωF=ωLC and imposing the cross-over
frequency
ωT as desired obtaining (always considering that ωT might be not higher than
1/10th of the switching frequency FSW):
21.1
Compensation network guidelines
The Compensation Network design assures to having system response according to the
cross-over frequency selected and to the output filter considered: it is anyway possible to
further fine-tune the compensation network modifying the bandwidth in order to get the best
response of the system as follow (See Figure 24):
●
Increase RF to increase the system bandwidth accordingly;
●
Decrease RF to decrease the system bandwidth accordingly;
●
Increase CF to move ωF to low frequencies increasing as a consequence the system
phase margin.
Having the fastest compensation network gives not the confidence to satisfy the
requirements of the load: the inductor still limits the maximum dI/dt that the system can
afford. In fact, when a load transient is applied, the best that the controller can do is to
“saturate” the duty cycle to its maximum (dMAX) or minimum (0) value. The output voltage
dV/dt is then limited by the inductor charge / discharge time and by the output capacitance.
In particular, the most limiting transition corresponds to the load removal since the inductor
results being discharged only by VOUT (while it is charged by dMAXVIN-VOUT during a load
appliance).
Referring to Figure 24-left, further tuning the Compensation network cannot give any
improvements unless the output filter changes: only modifying the main inductors ot the
output capacitance improves the system response.
Figure 24. RF-CF impact on bandwidth.
R
F
R
FB
V
OSC
V
IN
-------------------------------------
5
4
---
ω
T
L
NR
DROOP
ESR
+
()
-----------------------------------------------------------
=
C
F
C
O
L
N
----
R
F
------------------------
=
dB
ω
ZF(s)
GLOOP(s)
K
ω
LC = ωF
ω
ESR
ω
T
RF[dB]
RF
CF
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。