參數(shù)資料
型號: L6716
廠商: STMICROELECTRONICS
元件分類: 穩(wěn)壓器
英文描述: DUAL SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, QCC48
封裝: 7 X 7 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFQFP-48
文件頁數(shù): 38/57頁
文件大?。?/td> 829K
代理商: L6716
L6716
Output voltage monitor and protections
Doc ID 14521 Rev 3
43/57
18.5
Feedback disconnection
L6716 allows to protect the load from dangerous overvoltage also in case of feedback
disconnection. The device is able to recognize both FB pin and FBG pin disconnections, as
shown in the Figure 26.
When VSEN pin is more than 500 mV higher then VPROG, the device recognize a FBG
disconnections. Viceversa, when CS1- is more than 700 mV higher then VSEN, the device
recognize a FB disconnection.
In both of the previous condition the device stops switching with all the MOSFETs
permanently OFF and drives high the OSC/FAULT pin. The condition is latched until VCC or
OUTEN cycled.
Figure 26.
Feedback disconnection
COMP
To GND_core
(Remote Sense)
ERROR
AMPLIFIER
FB
FBG
RF
CF
VSEN
I
DROOP
To VCC_core
(Remote Sense)
RFB
VPROG
VREF
FBG
GND DROP
RECOVERY
CP
L1
DCR1
PHASE1
VOUT
CS1+
CS1-
R
C
Rg
FB
DISCONNECTED
700mV
FBG
DISCONNECTED
500mV
I
OS
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