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參數資料
| 型號： | L6706 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, QCC40 |
| 封裝： | 6 X 6 MM, ROHS COMPLIANT, VFQFPN-40 |
| 文件頁數： | 30/47頁 |
| 文件大?。?/td> | 623K |
| 代理商： | L6706 |
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Output voltage monitor and protections
L6706
36/47
Doc ID 15698 Rev 2
OCP during normal operation of the device. This value must take into consideration also the
transitions for details):
The device detects an over current when the IINFO overcome the threshold IOCTH externally
programmable through OCSET pin.
where
ΔIL is the inductor ripple current (peak-to-peak).
Since the device always senses the current across the inductor, the IOCTH crossing will
happen during the HS conduction time: as a consequence of OCP detection, the device will
turn OFF the HS MOSFET and turns ON the LSMOSFET until IINFO re-cross the threshold
or until the next clock cycle. This implies that the device limits the peak of the inductor
current.
In any case, the inductor current won't overcome the IOCP value and this will represent the
maximum peak value to consider in the OC design.
The device works in constant-current, and the output voltage decreases as the load
increase, until the output voltage reaches the UVP threshold. When this threshold is
crossed, MOSFETs are turned off and the device stops working. Cycle the power supply or
the OUTEN pin to restart operation.
Figure 20.
Overcurrent protection connection
Note:
In order to avoid the OCP intervention during the DVID, the device automatically increases
the OCP threshold to 150% of the selected OCP threshold during every VID transition
(adding an extra 15 s of delay).
Since the device reads the current information across inductor DCR, the process spread
and temperature variations of these sensing elements has to be considered. Also the
programmable threshold spread (IOCTH current spread as a consequence of VOCSET
IOUT
OCP
IOUT
MAX
I
DVID
–
+
>
I
OCTH
V
OCSET
R
OCSET
----------------------
1.260 typ
()
R
OCSET
----------------------------
==
I
INFO
OCP
DCR
Rg
-------------
I
OUT
OCP
ΔIL
2
---------
+
=
ROCSET
OCSET
VOCSET =1.260V (TYP)
I OCTH
R
OCSET
V
OCSET MIN
()
DCR MAX
)
()
Rg
-----------------------------------
I
OUT OCP
() ΔIL
2
---------
+
77
μA
+
-----------------------------------------------------------------------------------------------------------------------
=
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相關代理商/技術參數 |
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|---|---|
| L6706TR | 功能描述:DC/DC 開關控制器 VR11.1 SINGLE PHASE CNTRL W/INT DRI RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| L6709 | 功能描述:功率驅動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6709TR | 功能描述:功率驅動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6710 | 功能描述:功率驅動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6710TR | 功能描述:功率驅動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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