参数资料
型号: L5985TR
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: 2 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
封装: 3 X 3 MM, 1.08 MM HEIGHT, LEAD FREE, VFQFPN-8
文件页数: 16/37页
文件大小: 856K
代理商: L5985TR
L5985
Application information
Doc ID 13006 Rev 5
23/37
Figure 13.
Type II compensation network
The singularities of the network are:
In Figure 14 the Bode diagram of the PWM and LC filter transfer function (GPW0 GLC(f))
and the open loop gain (GLOOP(f) = GPW0 GLC(f) GTYPEII(f)) are drawn.
Figure 14.
Open loop gain: module Bode diagram
The guidelines for positioning the poles and the zeroes and for calculating the component
values can be summarized as follow:
1.
Choose a value for R1, usually between 1 kΩ and 5 kΩ, in order to have values of C4
and C5 not comparable with parasitic capacitance of the board.
2.
Choose a gain (R4/R1) in order to have the required bandwidth (BW), that means:
f
Z1
1
2
π R
4
C
4
------------------------------
=
f
P0
0
=
f
P1
1
2
π R
4
C
4
C
5
C
4
C
5
+
--------------------
--------------------------------------------
=
,,
相关PDF资料
PDF描述
L5989DTR 5.06 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16
L5989D 5.06 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16
L5991D013TR 1.5 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
L6258EX STEPPER MOTOR CONTROLLER, 1.5 A, PDSO36
L6470PD STEPPER MOTOR CONTROLLER, 7 A, PDSO36
相关代理商/技术参数
参数描述
L5986 功能描述:直流/直流开关调节器 2.5 A buck switching regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
L5986A 功能描述:直流/直流开关调节器 2.5 A STEP-DOWN SWITCH REG RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
L5986ATR 功能描述:直流/直流开关调节器 Step-down switch regulator, 2.5A RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
L5986TR 功能描述:直流/直流开关调节器 2.5 A Step-down Switch Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
L5987 功能描述:直流/直流开关调节器 3 A buck switching regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5