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参数资料
| 型号： | L6714 |
| 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： | 46/70页 |
| 文件大小： | 694K |
| 代理商： | L6714 |
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Over current protection
L6714
50/70
18
Over current protection
Depending on the current reading method selected, the device limits the peak or the bottom
of the inductor current entering in constant current until setting UVP as below explained.
The Over Current threshold has to be programmed, by designing the Rg resistors, to a safe
value, in order to be sure that the device doesn't enter OCP during normal operation of the
device. This value must take into consideration also the extra current needed during the
Dynamic VID Transition ID-VID and, since the device reads across MOSFET RdsON or
inductor DCR, the process spread and temperature variations of these sensing elements.
Moreover, since also the internal threshold spreads, the Rg design has to consider the
minimum value IOCTH(min) of the threshold as follow:
where IOCPx is the current measured by the current reading circuitry when the device enters
Quasi-Constant-Current. IOCPx must be calculated starting from the corresponding output
current value IOUT(OCP) as follow (ID-VID must also be considered when D-VID are
implemented) considering that the device performs Track & Hold only for the LS sense
mode:
where IOUT(OCP) is still the output current value at which the device enters Quasi-Constant-
Current, IPP is the inductor current ripple in each phase ID-VID is the additional current
required by D-VID (when applicable) and N the number of phases. In particular, since the
device limits the peak or the valley of the inductor current (according to DAC/CS_SEL
status), the ripple entity, when not negligible, impacts on the real OC threshold value and
must be considered.
Rg
I
OCPx max
()
R
SENSE max
()
I
OCTH min
()
-----------------------------------------------------------------------
=
I
OCPx
I
OUT OCP
()
N
---------------------------
I
PP
2
------------
I
DVID
–
N
------------------
+
–
LowSideMosfetSense
I
OUT OCP
()
N
---------------------------
I
PP
2
------------
I
DVID
–
N
------------------
++
InductorDCRSense
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6714TR | 功能描述:功率驱动器IC 4 Phase Controller RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| 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 |
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