- 您现在的位置：买卖IC网 > PDF目录299014 > E-L6917BD (STMICROELECTRONICS) SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO28 PDF资料下载
参数资料
| 型号： | E-L6917BD |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封装： | ROHS COMPLIANT, SO-28 |
| 文件页数： | 9/33页 |
| 文件大小： | 465K |
| 代理商： | E-L6917BD |
第1页第2页第3页第4页第5页第6页第7页第8页当前第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
17/33
L6917B
s
Current Sharing (CS) Control Loop
Active current sharing is implemented using the information from Tran conductance differential amplifier in an
average current mode control scheme. A current reference equal to the average of the read current (IAVG)is
internally built; the error between the read current and this reference is converted to a voltage with a proper gain
and it is used to adjust the duty cycle whose dominant value is set by the error amplifier at COMP pin (See fig.
11).
The current sharing control is a high bandwidth control loop allowing current sharing even during load transients.
The current sharing error is affected by the choice of external components; choose precise Rg resistor (
±1% is
necessary) to sense the current. The current sharing error is internally dominated by the voltage offset of Tran
conductance differential amplifier; considering a voltage offset equal to 2mV across the sense resistor, the cur-
rent reading error is given by the following equation:
Where
IREAD is the difference between one phase current and the ideal current (IMAX/2).
For Rsense = 4m
and Imax = 40A the current sharing error is equal to 2.5%, neglecting errors due to Rg and
Rsense mismatches.
Figure 11. Current Sharing Control Loop
s
Average Current Mode (ACM) Control Loop
The average current mode control loop is reported in figure 12. The current information IFB sourced by the FB
pin flows into RFB implementing the dependence of the output voltage from the read current.
The ACM control loop gain results (obtained opening the loop after the COMP pin):
Where:
–
is the equivalent output resistance determined by the droop function;
–ZP(s) is the impedance resulting by the parallel of the output capacitor (and its ESR) and the applied
load Ro;
I
R EAD
I
MA X
--------------------
2m V
R
SENSE IMAX
----------------------------------------
=
L1
L2
+
PWM1
1/5
IINFO2
IINFO1
PWM2
COMP
VOUT
CURRENT
SHARING
DUTY CYCLE
CORRECTION
D02IN1393
G
LOOP s
()
PWM Z
F s
() R
D ROOP
Z
P s
()
+
()
Z
P s
() Z
L s
()
+
()
Z
F s
()
As
()
---------------
1
As
()
------------
+
R
FB
+
------------------------------------------------------------------------------------------------------------------
=
R
DROOP
R
sense
R
g
------------------- R
FB
=
相关PDF资料 |
PDF描述 |
|---|---|
| E-L8150TR | BRUSHLESS DC MOTOR CONTROLLER, PDSO28 |
| E-L9935013TR | STEPPER MOTOR CONTROLLER, 2.5 A, PDSO20 |
| E1L33-3BOA6-02 | T-1 SINGLE COLOR LED, BLUE, 3 mm |
| E1L35-3G0A7-02 | T-1 SINGLE COLOR LED, GREEN, 3 mm |
| E1L35-3G0A5-02 | T-1 SINGLE COLOR LED, GREEN, 3 mm |
相关代理商/技术参数 |
参数描述 |
|---|---|
| E-L6917BDTR | 功能描述:DC/DC 开关控制器 Prog Dual-Phase Cont RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| E-L6919E | 功能描述:电流型 PWM 控制器 5-Bit Dual Ph Contlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| E-L6919ETR | 功能描述:电流型 PWM 控制器 5-Bit Dual Ph Contlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| E-L6920D | 功能描述:直流/直流开关转换器 0.6 to 5.5V Step-Up RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| E-L6920DTR | 功能描述:直流/直流开关转换器 0.6 to 5.5V Step-Up RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
发布紧急采购，3分钟左右您将得到回复。